Finite element analysis of relationship between tightening torque and initial load of bolted connections
|
|
- Emil Fields
- 6 years ago
- Views:
Transcription
1 Research Article Finite element analysis of relationship between tightening torque and initial load of bolted connections Advances in Mechanical Engineering 2015, Vol. 7(5) 1 8 Ó The Author(s) 2015 DOI: / aime.sagepub.com Qingmin Yu, Honglei Zhou and Libin Wang Abstract Proper initial load is necessary to ensure the stability of the bolted connections. In order to apply appropriate torque, the relationship between tightening torque and initial load should be determined. In this study, a detailed threedimensional finite element model of bolted joints was established with consideration of helix angle, pitch, thread type, tooth-type angle, and other details. The process of pre-tightening of bolted joints was simulated to validate the finite element model. The curves for the relationship between the torque and initial load obtained from finite element analysis agree well with those calculated from theoretical equations. Then, the influence of the friction coefficient, pitch, elastic modulus, assembly clearance, and strain-hardening exponent on the relationship was studied. The results show that the friction coefficient between nut and joint has great influence on the relationship between torque and initial load, that is, the larger the friction coefficient, the smaller the initial load of bolt at the same tightening torque. In contrast, the pitch, assembly clearance, Young s modulus, and strain-hardening exponent have little influence on torque initial load relation. The method used in this study provides a theoretical basis for accurately determining the tightening torque for bolted joints. Keywords Bolted connections, tightening torque, initial load, finite element Date received: 17 January 2015; accepted: 16 April 2015 Academic Editor: Jia-Jang Wu Bolted joints are widely used in mechanical structures as they are easy to be assembled and disassembled. Threaded joints must be tightened when installed so that the connected components are compressed while the bolt is stretched. The force acting on the bolt introduced by pre-tightening is named initial load. 1 The purpose of pre-tightening is to strengthen reliability and compactness of the connections. However, an excessive initial load will lead to yield and even fracture in the bolt; on the other hand, an insufficient initial load cannot provide the adequate clamping force which is required for maintaining the integrity of the joint and eventually causes structure loosening and failure. So, determining an appropriate initial load is quite important for bolted connections. It is hard to measure the initial load during the assembly process, so the common practice is using torque wrench to regulate the tightening torque. Thus, determining the relationship between the tightening torque and initial load is of remarkable significance in maintaining the reliability of the bolted joints. School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi an, China Corresponding author: Qingmin Yu, School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, No. 1 Dongxiang Road, Chang an Campus, P.O. Box 883, Xi an , China. qingminyu@163.com Creative Commons CC-BY: This article is distributed under the terms of the Creative Commons Attribution 3.0 License ( which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages ( openaccess.htm).
2 2 Advances in Mechanical Engineering Many factors can affect the relationship between torque and initial load. Lin and colleagues 2,3 studied the influence of lubrication conditions, surface treatment, materials of joints and bolt, size, and other factors. Izumi et al. 4 used three-dimensional (3D) finite element method (FEM) to explore the mechanism of the tightening and loosening processes under shear loading. The experimental results were compared with theoretical results, and the relation between tightening torque and initial load under elastic range of tightening process and the load distribution of threads was evaluated by 3D FEM. Nassar and Zaki 5 conducted experiments to explore the effects of surface coating, tightening speed, and repetitive tightening on the relationship between torque and initial load. Croccolo and colleagues 6 9 provided a useful experimental methodology to determine the friction coefficients in bolted joints and then to determine the relation between torque and initial load precisely. The assessment of the correct design methodology that allows selecting the appropriate screw to be used in high-duty bolted joints was conducted. The influence of tightening procedures and lubrication conditions on titanium screw joints for lightweight applications was completed. Failure analysis of bolted joints used in the front of motorbike suspensions to connect steering plates and legs and quantitative impact analysis of lubrication, forming process, surface treatment, and tightening times on the torque tension relationship were completed during tightening. Hwang 10 conducted a numerical simulation using FEM to set the installation torque for a joint in vehicle design process based on torque angle curves. A detailed 3D model of bolted joints was constructed. LS-DYNA was used to simulate the installation process of bolted joints by applying a torque gradually. Then, the relationship between torque and initial load was obtained and compared with experiment results. Wang et al. 11 made an experimental study of pre-tightening force for M16 galvanized bolts commonly used in transmission tower, and the effects of bolt strength grade, the presence or absence of washer, and the presence of lubrication on torque coefficient of bolted joints were analyzed. Furthermore, the control of torque coefficient and some key engineering problems about bolted connections were also discussed. Ganeshmurthy and Nassar 12 presented a precise method to establish bolt and nut models, taking into account the helix angle of threads. The 3D finite element analysis was conducted to simulate and evaluate different process control methods that are commonly used for automating the assembly of bolted joints in a mass production environment. The effects of friction coefficients and assembly clearance between bolt and joint on the torque coefficient of bolted joints were investigated. Many researchers have studied the stress and strain distribution over bolt using simplified model; however, few people studied using 3D finite element model of bolted joints accounting for helix angle to analyze the relation between tightening torque and initial load and factors affecting the torque coefficient. In this study, 3D detailed models of bolted joints were established with consideration of the helix angle of mating threads. Pre-tightening process of bolted joints used in aircraft gas turbine engine was simulated using 3D FEM. Load distribution of bolted joint was presented, and the relationship of torque and initial load was drawn and compared with the theoretical results. The effects of friction coefficient, pitch, Young s modulus, assembly clearance, and strain-hardening exponent on torque coefficient were discussed. Theoretical relation between torque and initial load For general nuts and bolts with rolled thread without lubrication, the short-form torque initial load equation could be represented in equation (1) 13 T = Pdk ð1þ where T is the input torque, P is the achieved initial load, d is the nominal diameter of thread, and k is a non-dimensional nut factor whose value is affected by the friction and contact condition between surfaces. k can vary widely from 0.09 to However, the scatter of this factor is too high to give an accurate prediction of the initial load for given torque, especially for critical joint applications. In order to obtain the relation between torque and initial load precisely, a more accurate equation provided by Motosh 14 neglecting the helix angle of threads is as follows T M = P 2p + m tr t cos b + m br b F ð2þ where T M is the tightening torque, m t is the coefficient of threads friction, m b is the friction coefficient of surfaces between nut and joint, r t is the effective threads contact radius, r b is the effective contact radius of surfaces between nut and joint, and b is half of the threads profile angle. The friction coefficient between nut and joint can be determined through mechanical experiment and calculated based on the following equation 15 dt df = m br b ð3þ The slope dt=df in equation (3) is obtained from the numerical differentiation of the T F relationship from the experiment.
3 Yu et al. 3 As we can see from equation (3), the friction coefficient between nut and joint is a function of initial load, and Jiang et al. 15 found that it decreases when the initial load is continuously increasing. In this article, we assume that it remains constant during pre-tightening. The expression of torque tension relation given by the Mechanism and Machine Theory is 16 T = 2 ð R3 r 3 Þf 3ðR 2 r 2 Þ + d 2 tanðl + rþ 2 P = 2 ð R3 r 3 Þf 3ðR 2 r 2 Þ + d 2 t cos b + f 0 ð4þ ð pd 2 Þ 2ðpd 2 cos b + tf 0 P Þ where T is the tightening torque, P is the initial load, d 2 is the pitch diameter of thread, l is the lead angle, tan l = t=pd 2, t is the pitch, f is the friction coefficient of surfaces between nut and joint, r is the equivalent friction angle of screw thread pair, tan r is the equivalent friction coefficient of screw thread pair, tan r = f 0 = cos b, b is the half angle of thread, b = 308 for triangular thread, f 0 is the friction coefficient of thread, R is the outer radius of nut bearing surface, and r is the inner radius of nut bearing surface. Since tf 0 is very small and f 0 = f under normal circumstances, equation (4) can be simplified as T = 2 ð R3 r 3 Þf 3ðR 2 r 2 Þ + t 2p + fd 2 P ð5þ 2 cos b The torque initial load relation in elastic tightening region proposed by Yamamoto based on the balance between the friction force on the contact surface and tightening torque can be expressed in equation (6) 4 T Y = 1 2 F P s p + 1:155m sd p + m w D v D v = 2 d3 w d3 h 3 dw 2 d2 h ð6þ where T Y is the tightening torque; F s is the initial load; P is the pitch of thread; m s and m w are the friction coefficients on the thread surface and nut bearing surface, respectively; d p is the effective diameter of the thread; D v is the equivalent friction diameter of nut bearing surface; and d w and d h are the diameters of nut bearing surface and the bolt hole, respectively. Finite element analysis The 3D finite element model was used to simulate the tightening process of bolted joints. The relationship between the tightening torque and initial load and the factors affecting the torque coefficient were investigated in this article. Figure 1. Finite element model and mesh. Finite element model The 3D finite element model consists of an M bolt, nut, and a joint, which is a hollow cylinder as shown in Figure 1. The inner and outer diameters of the hollow cylinder are 13 and 30 mm, respectively. The detailed thread model with consideration of the helix angle, basic profile, and angle of the thread is constructed through rotating thread profile around the axis of bolt or nut using the commercial finite element package ABAQUS, 17 which is also used to perform finite element analysis for pre-tightening process of bolted joint structures. Mesh The bolt and nut models are meshed using tetrahedral (C3D4) and hexahedral elements (C3D8R), respectively, and the joint model is meshed using hexahedral elements (C3D8R). In order to improve the accuracy and reduce time consumption of calculation, external threads of bolt and internal threads of nut are meshed with finer elements, whereas other regions and joint are meshed with coarse elements as shown in Figure 1. There are 39,617 elements in bolt, 24,866 elements in nut, and 26,028 elements in bolted joint model. Material properties The base material of bolt, nut, and joint is Nickel-based superalloy GH and steel. The Young s modulus for GH4169 and steel is 204 and 206 GPa, respectively; the density for GH4169 and steel is 8.24E-9 and 7.8E- 9 ton/mm 3, respectively; and the Poisson ratio for both materials is 0.3.
4 4 Advances in Mechanical Engineering Figure 2. Tightening torque applied by shear stress. Contact conditions Three contact interactions are established for all sliding surfaces in the finite element model, including the interfaces between the mating threads, nut face, and the upper surface of joint, bolt head surface, and the lower surface of joint. Bolt shank and bolt hole are not in contact with clearance fit. Surface-to-surface contact is set up using finite sliding formulation in ABAQUS. 17 Identical contact properties assigned for all contact interactions are assumed, which are hard contact and friction contact of normal and tangential behaviors, respectively. Friction coefficients between all contact surfaces are assumed to be the same. We define the friction coefficient as 0.15 using penalty method. Boundary conditions and load All nodes in the edges of the bottom surface of bolt head are fixed. Nodes of the outer surface of hollow cylinder are constrained in the radial direction but not along the bolt axis so that the joint can produce axial deformation during the process of pre-tightening. A target-tightening torque is applied to nut by way of applying equal and opposite shear stress distributed evenly on two corresponding sides of the hex nut as shown in Figure 2. The value of torque is calculated by T = tsl, where t is the shear stress distributed evenly on nut side, S is the area of nut side, and L is the distance between two sides. The torque value is selected as 110 N m in this study. Results and discussion Equivalent stress distributions over bolt and the cross section of bolted joint are obtained through finite element simulation when torque T = 110 Nm as presented in Figure 3. Initial load on the cross section of bolt is extracted at different tightening torques, and therefore, torque initial load curve is obtained and compared with curves drew through equations (2), (5), and (6), which are presented in Figure 4. Figure 3. Equivalent stress distribution at the end of tightening process as torque reaches 110 N m. Figure 4. Relation curves of tightening torque initial load. As can be seen from Figure 3, the highest stress occurred at the root of the first engaged thread between the bolt and nut because of stress concentration, with maximum stress up to 953 MPa. Stress at following engaged thread roots decreases gradually. From equation (1), the slope of the torque initial load curve is the product of k multiplied by d(kd). The value of k is from finite element analysis result, and k equals 0.210, 0.218, and calculated by equations (2), (5), and (6), respectively. The data show good agreement among four results. It is also observed from Figure 4 that the relation curve between torque and initial load based on finite element analysis is in reasonable agreement with that based on analytical equations derived by Motosh, Yamamoto, and given by the Mechanism and Machine Theory, especially with the equation provided by Motosh. Results of the comparison illustrate that the FEM and analytical procedures utilized in this article can simulate the process of tightening for bolted joint structures accurately.
5 Yu et al. 5 Figure 5. Effect of friction coefficient on torque initial load relation when pitch is 1.75 mm and assembly clearance is 0.5 mm. Figure 6. Effect of pitch on torque initial load relation when friction coefficient is 0.15 and assembly clearance is 0.5 mm. Effect of friction For bolted joints, the larger the friction coefficient, the greater the proportion of torque consumed to overcome the frictional resistance during the process of tightening, thus the smaller the initial load. Finite element simulations of pre-tightening process are conducted when friction coefficient is 0.1, 0.15, and 0.2 in order to analyze the effect of friction coefficient on torque initial load relation. The torque initial load curves corresponding to different friction coefficients are obtained and compared with the theoretical curves plotted through equations (2), (5), and (6), which are presented in Figure 5. It is observed that the torque initial load curves corresponding to different friction coefficients based on finite element analysis are consistent with the theoretical results. On the other hand, Figure 5 also shows that friction coefficient has great influence on the relationship between torque and initial load, namely, the larger the friction coefficient, the smaller the initial load of bolt at the same tightening torque. Effect of pitch Pitch is one of the parameters in equations (2), (5), and (6). In order to analyze the influence of pitch on torque initial load relation, coarse thread model for M12 bolt when pitch is 1.75 mm and fine thread models when pitch is 1.5 and 1.25 are established when other parameters are kept constant. The value of nut factor is 0.207, 0.210, and calculated by equation (2) when the pitch of thread is 1.75, 1.5, and 1.25, respectively. The torque initial load curves corresponding to different pitches are obtained and compared with the theoretical curves plotted through equations (2), (5), and (6), Figure 7. Effect of assembly clearance on torque initial load relation when friction coefficient is 0.15 and pitch is 1.75 mm. which are presented in Figure 6. It is observed that pitch almost has no influence on relation between torque and initial load, even if the results of finite element analysis are in accordance with theoretical results. Dk=DP 1:2%, where Dk and DP are the variations of nut factor and pitch, respectively. Effect of assembly clearance Connection between the bolt and the bolt hole is clearance fit; the greater the assembly clearance, the greater the effective contact radius of the contact between the nut face and the upper surface of joint. In this article, the effect of assembly clearance is investigated by the torque initial load curves shown in Figure 7 obtained through finite element analysis when assembly
6 6 Advances in Mechanical Engineering Figure 9. Equivalent stress and strain distribution contours at the end of pre-tightening process. Figure 8. Effect of elastic modulus on torque initial load relation when friction coefficient is 0.15, pitch is 1.75 mm, and assembly clearance is 0.5 mm. clearance is 0.5, 1, 2, 3, and 4 mm. Figure 7 reveals that the torque initial load relationship is not significantly affected by assembly clearance for the same target torque of 110 N m. Effect of Young s moduli When tightened at the same torque of 110 N m, the greater the elastic modulus of joint material, the less the deformation caused by compression. R is defined as the ratio of Young s modulus of joint material and Young s modulus of bolt material R = E j E b where E j is the Young s modulus of joint material and E b is the Young s modulus of bolt and nut materials. The torque initial load curves corresponding to different modulus ratios are shown in Figure 8 obtained through finite element analysis when the value of R is 0.1, 1, 5, and 20. It is observed that the torque initial load relationship is not significantly affected by Young s modulus for the same target torque of 110 N m similar to the effect of assembly clearance. Effect of strain-hardening exponent Stress at the root of thread, especially at the first engaged thread root, may exceed yield strength of bolt material due to stress concentration; therefore, plastic deformation starts from the first engaged thread in the process of tightening. Stress strain relation curve is no longer linear when stress exceeds yield strength of material, where an appropriate model is needed to describe the elastoplastic behavior of material. In this study, we chose the power-hardening model, 19 which is the most widely used in describing the constitutive relations of material e = ( s E, s y s E s y 1=n, s s y s sy ð7þ where s is the stress, e is the strain, E is the elastic modulus, s y is the yield strength, and n is the strainhardening exponent. The relation between stress and plastic strain when s s y can be expressed as follows 2 Ee n E e e y + 3n ep s = s y = s y 4 5 ð8þ s y s y where e e y is the elastic strain after the material yield and e p is the plastic strain. Taking E = 204 GPa and s y = 1200 MPa, the elastoplastic constitutive relations with different strainhardening exponents of the material can be calculated by equation (8). Elastic plastic finite simulation of tightening process is conducted when torque is 200 N m, friction coefficient is 0.15, and n = 0:1. Equivalent stress and strain distribution contours at the end of pre-tightening process are shown in Figure 9. As can be seen from Figure 9, the maximum stress, whose value is 1263 MPa, occurs at the root of the first engaged thread of mating threads. Plastic deformation occurs at the location where stress exceeds the yield limit of material and the maximum equivalent strain is In order to analyze the influence of strain-hardening exponent on torque initial load relation, the torque initial load curves presented in Figure 10 are obtained when n = 0:1, n = 0:5, and n = 1. There is no longer a linear relationship between tightening torque and initial load with the increase in torque after plastic
7 Yu et al. 7 during the process of pre-tightening for bolted joint. Declaration of conflicting interests The authors declare that there is no conflict of interest. Funding This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. Figure 10. Effect of strain-hardening exponent on torque initial load relation. deformation, but tightening torque initial load straight line becomes a curve at the top with the increase in torque after the bolt starts to yield. Conclusion A 3D finite element model of bolted structure of aircraft gas turbine engine is created with consideration of helix angle, pitch, thread type, tooth-type angle, and other details. Then, the pre-tightening process of bolted joint structures was investigated. The torque initial load relationship was obtained, and the effects of friction coefficient, pitch, Young s modulus, assembly clearance, and strain-hardening exponent were all investigated. Based on a comparison with theoretical relationships between torque and initial load, the following conclusions can be drawn: 1. Relation of tightening torque and initial load obtained from finite element analysis in this article agrees well with theoretical curves based on analytical equations derived by Motosh, Yamamoto, and given by the Mechanism and Machine Theory. It verifies the method used in this study and provides a theoretical basis for determining the tightening torque for bolted joint structures. 2. Friction coefficient has great influence on the relationship between torque and initial load. In contrast, pitch, assembly clearance, Young s modulus, and strain-hardening exponent have little influence on torque preload relation. On the other hand, plastic deformation of bolt will cause tightening torque initial load straight line to become a curve at the top with the increase in torque after the bolt starts to yield. Therefore, plastic deformation of bolt should be avoided References 1. Klebanov BM, Barlam DM and Nystrom FE. Machine elements: life and design. Boca Raton, FL: CRC Press, Lin SF and Se GF. Study on the relation of between tightening torque axial force of bolt. Aeronaut Stand Qual 1991; 6: Cao ZQ and Lin SF. Influence factors on the bolt tightening torque coefficient. Aeronaut Manuf Technol 1994; 4: Izumi S, Yokoyama T, Iwasaki A, et al. Three-dimensional finite element analysis of tightening and loosening mechanism of threaded fastener. Eng Fail Anal 2005; 12: Nassar SA and Zaki AM. Effect of coating thickness on the friction coefficients and torque tension relationship in threaded fasteners. J Tribol Trans ASME 2009; 131: Croccolo D, De Agostinis M and Vincenzi N. Failure analysis of bolted joints: effect of friction coefficients in torque preloading relationship. Eng Fail Anal 2011; 18: Croccolo D, De Agostinis M and Vincenzi N. Experimental analysis on the tightening torque preloading force relationship in threaded fasteners. In: ASME 2010 international mechanical engineering congress and exposition, Vancouver, BC, Canada, November 2010, pp New York: ASME. 8. Croccolo D and Vincenzi N. Tightening tests and friction coefficients definition in the steering shaft of front motorbike suspension. Strain 2011; 47: Croccolo D, De Agostinis M and Vincenzi N. Influence of tightening procedures and lubrication conditions on titanium screw joints for lightweight applications. Tribol Int 2012; 55: Hwang H-Y. Bolted joint torque setting using numerical simulation and experiments. J Mech Sci Technol 2013; 27: Wang P, Chen AS, Zhang HW, et al. Experimental study of the factors effecting on bolt torque coefficient. J Exp Mech 2013; 28: Ganeshmurthy S and Nassar SA. Finite element simulation of process control for bolt tightening in joints with nonparallel contact. J Manuf Sci E Trans ASME 2014; 136: Bickford JH. Introduction to the design and behavior of bolted joints, fourth edition: non-gasketed joints. Boca Raton, FL: CRC Press, 2007.
8 8 Advances in Mechanical Engineering 14. Motosh N. Development of design charts for bolts preloaded up to the plastic range. J Manuf Sci E Trans ASME 1976; 98: Jiang Y, Zhang M, Park T-W, et al. An experimental investigation on frictional properties of bolted joints. In: ASME 2002 pressure vessels and piping conference, Vancouver, BC, Canada, 5 9 August 2002, pp New York: ASME. 16. Qiu XH, Guo KQ and Wu ZZ. Machine design. Beijing, China: Higher Education Press, Hibbitt, Karlsson & Sorensen. ABAQUS user s manual, version 58. Plymouth, MI: Hibbitt, Karlsson & Sorensen, Inc., Shi CX, Yan MG and Liu BC. China aeronautical materials handbook. Beijing, China: Standards Press of China, Tvergaard V. Effect of stress-state and spacing on voids in a shear-field. Int J Solid Struct 2012; 49:
A new computational method for threaded connection stiffness
Research Article A new computational method for threaded connection stiffness Advances in Mechanical Engineering 2016, Vol. 8(12) 1 9 Ó The Author(s) 2016 DOI: 10.1177/1687814016682653 aime.sagepub.com
More informationInvestigation into the Self-loosening Trend of Bolt Joints on the Tower Crane ShengChun Wang1,a, PeiWei Ni1,b, Ye Zhang1,c and MingXiao Dong1,2,d
2nd International Conference on Advances in Mechanical Engineering and Industrial Informatics (AMEII 2016) Investigation into the Self-loosening Trend of Bolt Joints on the Tower Crane ShengChun Wang1,a,
More informationStress Analysis of Tensioning Bolt based on MATLAB
191 A publication of CHEMICAL ENGINEERING TRANSACTIONS VOL. 51, 016 Guest Editors: Tichun Wang, Hongyang Zhang, Lei Tian Copyright 016, AIDIC Servizi S.r.l., ISBN 978-88-95608-4-; ISSN 8-916 The Italian
More informationResearch Article An Analytical Model for Rotation Stiffness and Deformation of an Antiloosening Nut under Locking Force
Rotating Machinery, Article ID 410813, 8 pages http://dx.doi.org/10.1155/2014/410813 Research Article An Model for Rotation Stiffness and Deformation of an Antiloosening Nut under Locking Force X. J. Jiang,
More informationmy!wind Ltd 5 kw wind turbine Static Stability Specification
my!wind Ltd 5 kw wind turbine Static Stability Specification 1 P a g e 0 3 / 0 4 / 2 0 1 4 Contents Contents... 2 List of Changes... 2 Appendixes... 2 General remarks... 3 1. Introduction... 4 2. Geometry...
More informationmy!wind Ltd 5 kw wind turbine Static Stability Specification
my!wind Ltd 5 kw wind turbine Static Stability Specification 1 P a g e 0 3 / 0 4 / 2 0 1 4 Contents Contents... 2 List of Changes... 2 Appendixes... 2 General remarks... 3 1. Introduction... 4 2. Geometry...
More informationExperimental test of static and dynamic characteristics of tilting-pad thrust bearings
Special Issue Article Experimental test of static and dynamic characteristics of tilting-pad thrust bearings Advances in Mechanical Engineering 2015, Vol. 7(7) 1 8 Ó The Author(s) 2015 DOI: 10.1177/1687814015593878
More informationA novel technique of friction and material property measurement by tip test in cold forging
A novel technique of friction and material property measurement by tip test in cold forging Y T Im*, S H Kang, and J S Cheon Department of Mechanical Engineering, Korea Advanced Institute of Science and
More informationA PREDICTION METHOD FOR LOAD DISTRIBUTION IN THREADED CONNECTIONS
JOURNAL OF THEORETICAL AND APPLIED MECHANICS 56,, pp. 57-68, Warsaw 208 DOI: 0.5632/jtam-pl.56..57 A PREDICTION METHOD FOR LOAD DISTRIBUTION IN THREADED CONNECTIONS Dongmei Zhang School of Mechanical and
More informationTheoretical Calculation and Experimental Study On Sung Torque And Angle For The Injector Clamp Tightening Bolt Of Engine
Applied Mechanics and Materials Online: 201-08-08 ISSN: 1662-7482, Vols. 51-52, pp 1284-1288 doi:10.4028/www.scientific.net/amm.51-52.1284 201 Trans Tech Publications, Switzerland Theoretical Calculation
More informationStress Analysis Lecture 3 ME 276 Spring Dr./ Ahmed Mohamed Nagib Elmekawy
Stress Analysis Lecture 3 ME 276 Spring 2017-2018 Dr./ Ahmed Mohamed Nagib Elmekawy Axial Stress 2 Beam under the action of two tensile forces 3 Beam under the action of two tensile forces 4 Shear Stress
More informationSamantha Ramirez, MSE. Stress. The intensity of the internal force acting on a specific plane (area) passing through a point. F 2
Samantha Ramirez, MSE Stress The intensity of the internal force acting on a specific plane (area) passing through a point. Δ ΔA Δ z Δ 1 2 ΔA Δ x Δ y ΔA is an infinitesimal size area with a uniform force
More informationFor ASME Committee use only.
ð15þ KD-232 PROTECTION AGAINST LOCAL FAILURE In addition to demonstrating protection against plastic collapse as defined in KD-231, the local failure criteria below shall be satisfied. KD-232.1 Elastic
More informationMECHANICS OF MATERIALS
2009 The McGraw-Hill Companies, Inc. All rights reserved. Fifth SI Edition CHAPTER 3 MECHANICS OF MATERIALS Ferdinand P. Beer E. Russell Johnston, Jr. John T. DeWolf David F. Mazurek Torsion Lecture Notes:
More informationMODULE F: SIMPLE CONNECTIONS
MODULE F: SIMPLE CONNECTIONS This module of CIE 428 covers the following subjects Connector characterization Failure modes of bolted shear connections Detailing of bolted connections Bolts: common and
More informationMethodology for the evaluation of yield strength and hardening behavior of metallic materials by indentation with spherical tip
JOURNAL OF APPLIED PHYSICS VOLUME 94, NUMBER 1 1 JULY 2003 Methodology for the evaluation of yield strength and hardening behavior of metallic materials by indentation with spherical tip Dejun Ma Department
More informationOptimization of blank dimensions to reduce springback in the flexforming process
Journal of Materials Processing Technology 146 (2004) 28 34 Optimization of blank dimensions to reduce springback in the flexforming process Hariharasudhan Palaniswamy, Gracious Ngaile, Taylan Altan ERC
More informationOpen Access Damping Prediction Technique of the Bolted Joint Structure Considering Pretension Force
Send Orders for Reprints to reprints@benthamscience.ae 622 The Open Civil Engineering Journal, 2015, 9, 622-626 Open Access Damping Prediction Technique of the Bolted Joint Structure Considering Pretension
More informationClassic Mini ( ) Transmission Bearing Load Estimates During Service
Classic Mini (1959 2000) Transmission Bearing Load Estimates During Service Purpose The removal and replacement of the nuts at the ends of the first and third motion shafts in the classic Mini transmission
More informationContact pressure distribution in joints formed by V-band clamps Simon M Barrans 1,a, Goodarz Khodabakhshi 1,b and Qiang Xu 1,c
Contact pressure distribution in joints formed by V-band clamps Simon M Barrans 1,a, Goodarz Khodabakhshi 1,b and Qiang Xu 1,c 1 School of Computing and Engineering, University of Huddersfield, Queensgate,
More informationStrength Study of Spiral Flexure Spring of Stirling Cryocooler
Sensors & Transducers 2013 by IFSA http://www.sensorsportal.com Strength Study of Spiral of Stirling Cryocooler WANG Wen-Rui, NIE Shuai, ZHANG Jia-Ming School of Mechanical Engineering, University of Science
More informationPREDICTION OF OUT-OF-PLANE FAILURE MODES IN CFRP
PREDICTION OF OUT-OF-PLANE FAILURE MODES IN CFRP R. R. Pinto 1, P. P. Camanho 2 1 INEGI - Instituto de Engenharia Mecanica e Gestao Industrial, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal 2 DEMec,
More information2012 MECHANICS OF SOLIDS
R10 SET - 1 II B.Tech II Semester, Regular Examinations, April 2012 MECHANICS OF SOLIDS (Com. to ME, AME, MM) Time: 3 hours Max. Marks: 75 Answer any FIVE Questions All Questions carry Equal Marks ~~~~~~~~~~~~~~~~~~~~~~
More informationEMA 3702 Mechanics & Materials Science (Mechanics of Materials) Chapter 3 Torsion
EMA 3702 Mechanics & Materials Science (Mechanics of Materials) Chapter 3 Torsion Introduction Stress and strain in components subjected to torque T Circular Cross-section shape Material Shaft design Non-circular
More information3-D Finite Element Analysis of Bolted Flange Joint of Pressure Vessel
ISSN No. 2230 7699 MIT Publications 35 3-D Finite Element Analysis of Bolted Flange Joint of Pressure Vessel Nomesh Kumar, P.V.G. Brahamanandam and B.V. Papa Rao Advanced Systems Laboratory, Defence Research
More informationCHAPTER 7 FINITE ELEMENT ANALYSIS OF DEEP GROOVE BALL BEARING
113 CHAPTER 7 FINITE ELEMENT ANALYSIS OF DEEP GROOVE BALL BEARING 7. 1 INTRODUCTION Finite element computational methodology for rolling contact analysis of the bearing was proposed and it has several
More informationEffect of Mandrel, Its Clearance and Pressure Die on Tube Bending Process via Rotary Draw Bending Method
Int J Advanced Design and Manufacturing Technology, Vol. 5/ No. 5/ December - 212 47 Effect of Mandrel, Its Clearance and Pressure Die on Tube Bending Process via Rotary Draw Bending Method H. Masoumi
More informationNonlinear Finite Element Modeling of Nano- Indentation Group Members: Shuaifang Zhang, Kangning Su. ME 563: Nonlinear Finite Element Analysis.
ME 563: Nonlinear Finite Element Analysis Spring 2016 Nonlinear Finite Element Modeling of Nano- Indentation Group Members: Shuaifang Zhang, Kangning Su Department of Mechanical and Nuclear Engineering,
More informationExperimental and analytical studies on the pullout strength of round thread casing connections
Indian Journal of Engineering & Materials Science Vol. 20, December 2013, pp. 497-503 Experimental and analytical studies on the pullout strength of round thread casing connections Lianxin Gao a * & Jiaoqi
More informationStrength Analysis and Experiment of High Speed Railway Gearbox Bracket
Send Orders for Reprints to reprints@benthamscience.ae 66 The Open Mechanical Engineering Journal, 015, 9, 66-70 Open Access Strength Analysis and Experiment of High Speed Railway Gearbox Bracket Jianwei
More informationAn Innovative Planetary Gear Reducer with Overcoming the Dead Point
Send Orders for Reprints toreprints@benthamscience.net 70 The Open Mechanical Engineering Journal, 2013, 7, 70-75 Open Access An Innovative Planetary Gear Reducer with Overcoming the Dead Point Feng Guan,
More informationCONNECTION DESIGN. Connections must be designed at the strength limit state
CONNECTION DESIGN Connections must be designed at the strength limit state Average of the factored force effect at the connection and the force effect in the member at the same point At least 75% of the
More informationNote to reviewers: See next page for basis for the change shown on this page. L-3160 TANGENTIAL CONTACT BETWEEN FLANGES OUTSIDE THE BOLT CIRCLE
ASME BPVC.III.A-2017 ð17þ L-3160 TANGENTIAL CONTACT BETWEEN FLANGES OUTSIDE THE BOLT CIRCLE The design procedure is based on the assumption that the flanges are in tangential contact at their outside diameter
More informationMechanics of Solids. Mechanics Of Solids. Suraj kr. Ray Department of Civil Engineering
Mechanics Of Solids Suraj kr. Ray (surajjj2445@gmail.com) Department of Civil Engineering 1 Mechanics of Solids is a branch of applied mechanics that deals with the behaviour of solid bodies subjected
More informationNew Representation of Bearings in LS-DYNA
13 th International LS-DYNA Users Conference Session: Aerospace New Representation of Bearings in LS-DYNA Kelly S. Carney Samuel A. Howard NASA Glenn Research Center, Cleveland, OH 44135 Brad A. Miller
More informationReliability analysis of different structure parameters of PCBA under drop impact
Journal of Physics: Conference Series PAPER OPEN ACCESS Reliability analysis of different structure parameters of PCBA under drop impact To cite this article: P S Liu et al 2018 J. Phys.: Conf. Ser. 986
More informationFinite element prediction of the ultimate axial load capacity of V-section band clamps
Journal of Physics: Conference Series Finite element prediction of the ultimate axial load capacity of V-section band clamps To cite this article: S M Barrans and M Muller 2009 J. Phys.: Conf. Ser. 181
More informationUnit I Stress and Strain
Unit I Stress and Strain Stress and strain at a point Tension, Compression, Shear Stress Hooke s Law Relationship among elastic constants Stress Strain Diagram for Mild Steel, TOR steel, Concrete Ultimate
More informationStructural Analysis I Chapter 4 - Torsion TORSION
ORSION orsional stress results from the action of torsional or twisting moments acting about the longitudinal axis of a shaft. he effect of the application of a torsional moment, combined with appropriate
More informationExperiment Study on Rheological Model of Soft Clay
Send Orders for Reprints to reprints@benthamscience.ae 344 The Open Civil Engineering Journal, 2014, 8, 344-350 Experiment Study on Rheological Model of Soft Clay Open Access Donglin Wang*, Qiuling Lv
More informationMECHANICS OF MATERIALS
GE SI CHAPTER 3 MECHANICS OF MATERIALS Ferdinand P. Beer E. Russell Johnston, Jr. John T. DeWolf David F. Mazurek Torsion Lecture Notes: J. Walt Oler Texas Tech University Torsional Loads on Circular Shafts
More informationResearch Article Finite Element Analysis of Flat Spiral Spring on Mechanical Elastic Energy Storage Technology
Research Journal of Applied Sciences, Engineering and Technology 7(5): 993-1000, 2014 DOI:10.19026/rjaset.7.348 ISSN: 2040-7459; e-issn: 2040-7467 2014 Maxwell Scientific Publication Corp. Submitted: January
More informationNORMAL STRESS. The simplest form of stress is normal stress/direct stress, which is the stress perpendicular to the surface on which it acts.
NORMAL STRESS The simplest form of stress is normal stress/direct stress, which is the stress perpendicular to the surface on which it acts. σ = force/area = P/A where σ = the normal stress P = the centric
More informationSTEEL. General Information
General Information General Information TYPICAL STRESS-STRAIN CURVE Below is a typical stress-strain curve. Each material has its own unique stress-strain curve. Tensile Properties Tensile properties indicate
More informationStresses Analysis of Petroleum Pipe Finite Element under Internal Pressure
ISSN : 48-96, Vol. 6, Issue 8, ( Part -4 August 06, pp.3-38 RESEARCH ARTICLE Stresses Analysis of Petroleum Pipe Finite Element under Internal Pressure Dr.Ragbe.M.Abdusslam Eng. Khaled.S.Bagar ABSTRACT
More informationSTRESS, STRAIN AND DEFORMATION OF SOLIDS
VELAMMAL COLLEGE OF ENGINEERING AND TECHNOLOGY, MADURAI 625009 DEPARTMENT OF CIVIL ENGINEERING CE8301 STRENGTH OF MATERIALS I -------------------------------------------------------------------------------------------------------------------------------
More informationTHREE DIMENSIONAL STRESS ANALYSIS OF THE T BOLT JOINT
THREE DIMENSIONAL STRESS ANALYSIS OF THE T BOLT JOINT Víctor Martínez 1, Alfredo Güemes 2, Norbert Blanco 1, Josep Costa 1 1 Escola Politècnica Superior. Universitat de Girona. Girona, Spain (17071) 2
More informationInitial Stress Calculations
Initial Stress Calculations The following are the initial hand stress calculations conducted during the early stages of the design process. Therefore, some of the material properties as well as dimensions
More informationA study of action point correction factor for L type flanges of wind turbine towers
Received: 16 November 2017 Revised: 10 January 2018 Accepted: 22 February 2018 DOI: 10.1002/we.2193 SHORT COMMUNICATION A study of action point correction factor for L type flanges of wind turbine towers
More information[5] Stress and Strain
[5] Stress and Strain Page 1 of 34 [5] Stress and Strain [5.1] Internal Stress of Solids [5.2] Design of Simple Connections (will not be covered in class) [5.3] Deformation and Strain [5.4] Hooke s Law
More informationKey words: Polymeric Composite Bearing, Clearance, FEM
A study on the effect of the clearance on the contact stresses and kinematics of polymeric composite journal bearings under reciprocating sliding conditions Abstract The effect of the clearance on the
More informationApplication nr. 7 (Connections) Strength of bolted connections to EN (Eurocode 3, Part 1.8)
Application nr. 7 (Connections) Strength of bolted connections to EN 1993-1-8 (Eurocode 3, Part 1.8) PART 1: Bolted shear connection (Category A bearing type, to EN1993-1-8) Structural element Tension
More informationAnalysis of the torsional load capacity of V-section band clamps Simon M Barrans 1,a, Adelle Waterworth 1,b and Salahaddin Sahboun 1,c
Analysis of the torsional load capacity of V-section band clamps Simon M Barrans 1,a, Adelle Waterworth 1,b and Salahaddin Sahboun 1,c 1 School of Computing and Engineering, University of Huddersfield,
More informationExperiment Two (2) Torsional testing of Circular Shafts
Experiment Two (2) Torsional testing of Circular Shafts Introduction: Torsion occurs when any shaft is subjected to a torque. This is true whether the shaft is rotating (such as drive shafts on engines,
More informationTHE EFFECT OF GEOMETRY ON FATIGUE LIFE FOR BELLOWS
Advanced Materials Development and Performance (AMDP2011) International Journal of Modern Physics: Conference Series Vol. 6 (2012) 343-348 World Scientific Publishing Company DOI: 10.1142/S2010194512003418
More informationDRIFTER PLOW-IN-A-BOX ASSEMBLY / OWNER S MANUAL
DRIFTER PLOW-IN-A-BOX ASSEMBLY / OWNER S MANUAL Part No: 10-0550 OPERATING INSTRUCTIONS Congratulations! You ve just purchased one of the industry s top plow systems. The DRIFTER Plow System works great
More informationStress Intensity Factor Determination of Multiple Straight and Oblique Cracks in Double Cover Butt Riveted Joint
ISSN (Online) : 2319-8753 ISSN (Print) : 2347-671 International Journal of Innovative Research in Science, Engineering and Technology Volume 3, Special Issue 3, March 214 214 International Conference on
More informationNumerical analysis of dynamic characteristics of wet friction temperature fields
Research Article Numerical analysis of dynamic characteristics of wet friction temperature fields Advances in Mechanical Engineering 2017, Vol. 9(12) 1 14 Ó The Author(s) 2017 DOI: 10.1177/1687814017745252
More informationChapter 7. Highlights:
Chapter 7 Highlights: 1. Understand the basic concepts of engineering stress and strain, yield strength, tensile strength, Young's(elastic) modulus, ductility, toughness, resilience, true stress and true
More informationQUESTION BANK SEMESTER: III SUBJECT NAME: MECHANICS OF SOLIDS
QUESTION BANK SEMESTER: III SUBJECT NAME: MECHANICS OF SOLIDS UNIT 1- STRESS AND STRAIN PART A (2 Marks) 1. Define longitudinal strain and lateral strain. 2. State Hooke s law. 3. Define modular ratio,
More informationThe Design of Reactor Internals Hold-Down Spring
MATEC Web of Conferences 40, 02002 ( 2016) DOI: 10.1051/ matecconf/ 2016400200 2 C Owned by the authors, published by EDP Sciences, 2016 The Design of Reactor Internals Hold-Down Spring Xue Guohong 1,a,
More informationNUMERICAL SIMULATION ON THERMAL CONTACT RESISTANCE OF PRACTICAL SOLID SURFACES
Proceedings of the Asian Conference on Thermal Sciences 2017, 1st ACTS March 26-30, 2017, Jeju Island, Korea ACTS-P00642 NUMERICAL SIMULATION ON THERMAL CONTACT RESISTANCE OF PRACTICAL SOLID SURFACES Yan-Jun
More informationTable of Contents. Preface...xvii. Part 1. Level
Preface...xvii Part 1. Level 1... 1 Chapter 1. The Basics of Linear Elastic Behavior... 3 1.1. Cohesion forces... 4 1.2. The notion of stress... 6 1.2.1. Definition... 6 1.2.2. Graphical representation...
More informationChapter 12. Static Equilibrium and Elasticity
Chapter 12 Static Equilibrium and Elasticity Static Equilibrium Equilibrium implies that the object moves with both constant velocity and constant angular velocity relative to an observer in an inertial
More informationDETERMINING THE STRESS PATTERN IN THE HH RAILROAD TIES DUE TO DYNAMIC LOADS 1
PERIODICA POLYTECHNICA SER. CIV. ENG. VOL. 46, NO. 1, PP. 125 148 (2002) DETERMINING THE STRESS PATTERN IN THE HH RAILROAD TIES DUE TO DYNAMIC LOADS 1 Nándor LIEGNER Department of Highway and Railway Engineering
More informationAnalysis of a Lap Joint Including Fastener Hole Residual Stress Effects
Analysis of a Lap Joint Including Fastener Hole Residual Stress Effects Guillaume Renaud, Gang Li, Guoqin Shi, Yan Bombardier, Min Liao Aerospace Portfolio AFGROW User Workshop 214, Layton, UT, September
More informationNUMERICAL SIMULATION OF FLANGE-BOLT INTERACTION IN WIND TUBRINE TOWER CONNECTIONS
8 th International Congress on Computational Mechanics Volos, 12 July 15 July 2015 NUMERICAL SIMULATION OF FLANGE-BOLT INTERACTION IN WIND TUBRINE TOWER CONNECTIONS Aikaterini I. Ntaifoti 1, Konstantina
More informationTorsion of shafts with circular symmetry
orsion of shafts with circular symmetry Introduction Consider a uniform bar which is subject to a torque, eg through the action of two forces F separated by distance d, hence Fd orsion is the resultant
More information12/25/ :27 PM. Chapter 14. Spur and Helical Gears. Mohammad Suliman Abuhaiba, Ph.D., PE
Chapter 14 Spur and Helical Gears 1 2 The Lewis Bending Equation Equation to estimate bending stress in gear teeth in which tooth form entered into the formulation: 3 The Lewis Bending Equation Assume
More informationSIMPLIFIED MODELING OF THIN-WALLED TUBES WITH OCTAGONAL CROSS SECTION AXIAL CRUSHING. Authors and Correspondance: Abstract:
SIMPLIFIED MODELING OF THIN-WALLED TUBES WITH OCTAGONAL CROSS SECTION AXIAL CRUSHING Authors and Correspondance: Yucheng Liu, Michael L. Day Department of Mechanical Engineering University of Louisville
More informationQUESTION BANK DEPARTMENT: CIVIL SEMESTER: III SUBJECT CODE: CE2201 SUBJECT NAME: MECHANICS OF SOLIDS UNIT 1- STRESS AND STRAIN PART A
DEPARTMENT: CIVIL SUBJECT CODE: CE2201 QUESTION BANK SEMESTER: III SUBJECT NAME: MECHANICS OF SOLIDS UNIT 1- STRESS AND STRAIN PART A (2 Marks) 1. Define longitudinal strain and lateral strain. 2. State
More informationSIMPLE MODEL FOR PRYING FORCES IN T-HANGER CONNECTIONS WITH SNUG TIGHTENED BOLTS
SIMPLE MODEL FOR PRYING FORCES IN T-HANGER CONNECTIONS WITH SNUG TIGHTENED BOLTS By Fathy Abdelmoniem Abdelfattah Faculty of Engineering at Shoubra, Zagazig University, Banha Branch Mohamed Salah A. Soliman
More informationModeling Method Analysis of the Friction Torque for High Speed Spindle Bearing
MATEC Web of Conferences 75, 0308 (08) https://doi.org/0.05/matecconf/08750308 IFCAE-IOT 08 Modeling Method Analysis of the Friction Torque for High Speed Spindle Bearing Songsheng Li,, HuihangChen,, Haibing
More informationFailure analysis of serial pinned joints in composite materials
Indian Journal of Engineering & Materials Sciences Vol. 18, April 2011, pp. 102-110 Failure analysis of serial pinned joints in composite materials Alaattin Aktaş* Department of Mechanical Engineering,
More informationEXPERIMENTAL EVALUATION OF SHEAR STRENGTH OF WOVEN WEBBINGS
EXPERIMENTAL EVALUATION OF SHEAR STRENGTH OF WOVEN WEBBINGS Kevin L. Peil +, Ever J. Barbero +, Eduardo M. Sosa* + Department of Mechanical and Aerospace Engineering, West Virginia University (WVU), Morgantown,
More informationStudy on High-Temperature Glass Lens Molding Process Using FEM Simulation
Send Orders for Reprints to reprints@benthamscience.ae 14 The Open Materials Science Journal, 2015, 9, 14-19 Open Access Study on High-Temperature Glass Lens Molding Process Using FEM Simulation Zhang
More informationCHAPTER 8 SCREWS, FASTENERS, NONPERMANENT JOINTS
CHAPTER 8 SCREWS, FASTENERS, NONPERMANENT JOINTS This chapter deals with the design and analysis of nonpermanent fasteners such as bolts, power screws, cap screws, setscrews, eys and pins. 8- Standards
More informationPSD Analysis and Optimization of 2500hp Shale Gas Fracturing Truck Chassis Frame
Send Orders for Reprints to reprints@benthamscience.ae The Open Mechanical Engineering Journal, 2014, 8, 533-538 533 Open Access PSD Analysis and Optimization of 2500hp Shale Gas Fracturing Truck Chassis
More informationAnalysis and Calculation of Double Circular Arc Gear Meshing Impact Model
Send Orders for Reprints to reprints@benthamscienceae 160 The Open Mechanical Engineering Journal, 015, 9, 160-167 Open Access Analysis and Calculation of Double Circular Arc Gear Meshing Impact Model
More informationUNIT 1 STRESS STRAIN AND DEFORMATION OF SOLIDS, STATES OF STRESS 1. Define stress. When an external force acts on a body, it undergoes deformation.
UNIT 1 STRESS STRAIN AND DEFORMATION OF SOLIDS, STATES OF STRESS 1. Define stress. When an external force acts on a body, it undergoes deformation. At the same time the body resists deformation. The magnitude
More informationFinite-Element Analysis of Parts Stress State of Tight Joint Assembled by Press Fitting
Modern Mechanical Engineering, 04, 4, 98-06 Published Online November 04 in SciRes. http://www.scirp.org/journal/mme http://dx.doi.org/0.46/mme.04.4409 Finite-Element Analysis of Parts Stress State of
More informationDRIFTER PLOW-IN-A-BOX
DRIFTER PLOW-IN-A-BOX ASSEMBLY / OWNER S MANUAL Part No: 10-0550 OPERATING INSTRUCTIONS Congratulations! You ve just purchased one of the industry s top plow systems. The DRIFTER Plow System works great
More informationSHARK Snow Plow. 52 (132 cm) / 60 (152 cm) Complete system blade INSTRUCTIONS / ESTABLISHMENT
SHARK Snow Plow 52 (132 cm) / 60 (152 cm) Complete system blade INSTRUCTIONS / ESTABLISHMENT OPERATING INSTRUCTIONS Congratulations! You ve just purchased the most durable plow system in the industry.
More informationPES Institute of Technology
PES Institute of Technology Bangalore south campus, Bangalore-5460100 Department of Mechanical Engineering Faculty name : Madhu M Date: 29/06/2012 SEM : 3 rd A SEC Subject : MECHANICS OF MATERIALS Subject
More informationCIVL222 STRENGTH OF MATERIALS. Chapter 6. Torsion
CIVL222 STRENGTH OF MATERIALS Chapter 6 Torsion Definition Torque is a moment that tends to twist a member about its longitudinal axis. Slender members subjected to a twisting load are said to be in torsion.
More informationPrecision Ball Screw/Spline
58-2E Models BNS-A, BNS, NS-A and NS Seal Outer ring Shim plate Seal Spline nut Seal Collar Shim plate Seal End cap Ball Outer ring Ball screw nut Outer ring Ball Retainer Retainer Outer ring Point of
More informationAutomatic Level Maintenance Manual SAL-XX W/ AIR DAMPENED COMPENSATOR
Automatic Level Maintenance Manual SAL-XX W/ AIR DAMPENED COMPENSATOR CST/Berger 2001 SAL 20/24/28/32 PAGE 1 REV. C 071803 Automatic Level Maintenance Manual User Calibration and Testing... 3 Circular
More informationTightening control by ultrasound
19 th World Conference on Non-Destructive Testing 16 Tightening control by ultrasound Farid BELAHCENE 1, Pierre SAMSON 1 1 ULTRA RS, 145 Breviandes, France Contact e-mail: f.belahcene@ultrars.com Abstract.
More informationEvaporation of nanofluid droplet on heated surface
Research Article Evaporation of nanofluid droplet on heated surface Advances in Mechanical Engineering 1 8 Ó The Author(s) 2015 DOI: 10.1177/1687814015578358 aime.sagepub.com Yeung Chan Kim Abstract In
More informationNonlinear Finite Element Analysis of Gasketed Flange Joints under Combined Internal Pressure and Different Thermal Loading Conditions
Failure of Engineering Materials & Structures Code 50 UET TAXILA MECHNICAL ENGINEERING DEPARTMENT Nonlinear Finite Element Analysis of Gasketed Flange Joints under Combined Internal Pressure and Different
More informationSimulation of a Two-Roll Straightening Process and Analysis of Residual Stress After Straightening
Simulation of a Two-Roll Straightening Process and Analysis of Residual Stress After Straightening Yufeng Wang, Cai Liu * National Engineering Research Center for Equipment and Technology of Cold Strip
More informationApplicability of the Hertz Contact Theory to Rolling Rubber Cylinders Model
International Journal of Mechanical Engineering and Applications 2016; 4(6): 242-248 http://www.sciencepublishinggroup.com/j/ijmea doi: 10.11648/j.ijmea.20160406.15 ISSN: 2330-023X (Print); ISSN: 2330-0248
More informationOpen Access Prediction on Deflection of V-core Sandwich Panels in Weak Direction
Send Orders for Reprints to reprints@benthamscience.net The Open Ocean Engineering Journal, 2013, 6, Suppl-1, M5) 73-81 73 Open Access Prediction on Deflection of V-core Sandwich Panels in Weak Direction
More informationThe University of Melbourne Engineering Mechanics
The University of Melbourne 436-291 Engineering Mechanics Tutorial Four Poisson s Ratio and Axial Loading Part A (Introductory) 1. (Problem 9-22 from Hibbeler - Statics and Mechanics of Materials) A short
More information2 Experiment of GFRP bolt
16 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS FATIGUE LIFE EVALUATION OF BOLT MADE OF WOVEN FABRIC FRP Takeshi INOUE*, Hiroaki NAKAI**, Tetsusei KURASHIKI**, Masaru ZAKO**, Yuji KOMETANI*** *Graduate
More informationDESIGN OF STORAGE AND MATERIAL HANDLING SYSTEM FOR PIPE INDUSTRY A CASE STUDY
DESIGN OF STORAGE AND MATERIAL HANDLING SYSTEM FOR PIPE INDUSTRY A CASE STUDY Mr.S.S.Chougule 1, Mr.A.S.Chavan 2, Miss.S.M.Bhujbal 3, Mr.K.S.Falke 4 Prof.R.R.Joshi 5, Prof.M.B.Tandle 6 1,2,3,4 Student,
More informationArberi Ferraj. Wentworth Institute of Technology. Design of Machine Elements MECH 420
P a g e 1 Arberi Ferraj Wentworth Institute of Technology Design of Machine Elements MECH 420 P a g e 2 1. Executive Summary A scissor car jack was designed and must be reverse-engineered in order to discover
More informationEQUIVALENT FRACTURE ENERGY CONCEPT FOR DYNAMIC RESPONSE ANALYSIS OF PROTOTYPE RC GIRDERS
EQUIVALENT FRACTURE ENERGY CONCEPT FOR DYNAMIC RESPONSE ANALYSIS OF PROTOTYPE RC GIRDERS Abdul Qadir Bhatti 1, Norimitsu Kishi 2 and Khaliq U Rehman Shad 3 1 Assistant Professor, Dept. of Structural Engineering,
More informationTorsion Stresses in Tubes and Rods
Torsion Stresses in Tubes and Rods This initial analysis is valid only for a restricted range of problem for which the assumptions are: Rod is initially straight. Rod twists without bending. Material is
More informationExample-3. Title. Description. Cylindrical Hole in an Infinite Mohr-Coulomb Medium
Example-3 Title Cylindrical Hole in an Infinite Mohr-Coulomb Medium Description The problem concerns the determination of stresses and displacements for the case of a cylindrical hole in an infinite elasto-plastic
More information