Indentation tests of aluminium honeycombs

Size: px
Start display at page:

Download "Indentation tests of aluminium honeycombs"

Transcription

1 Journal of Physics: Conference Series OPEN ACCESS Indentation tests of aluminium honeycombs To cite this article: A Ashab et al 213 J. Phys.: Conf. Ser View the article online for updates and enhancements. This content was downloaded from IP address on 17//218 at 18:38

2 D2FAM 213 Indentation tests of aluminium honeycombs A Ashab 1, Y C Wong 1, G Lu 2 and D Ruan 1, 3 1 Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia 2 School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore druan@swin.edu.au Abstract. Aluminium honeycomb is a type of cellular material which has high strength to weigh ratio and is a good energy absorber. They are used as structural components in various engineering applications. Comprehensive study has been conducted on the compressive behavior of aluminium honeycombs. However, the research of aluminium honeycombs subjected to other type of loading, such as indentation, is still limited. In this paper, quasi-static and dynamic indentation tests were conducted to study the deformation and energy absorption of three types of HEXCELL aluminium honeycombs with different cell sizes and cell wall thicknesses. Quasi-static tests were conducted by using a universal MTS machine at velocities of.5 mm/s,.5 mm/s and 5 mm/s, respectively. Dynamic tests were conducted by using a high speed INSTRON machine at a velocity of 5 m/s. Force-displacement curves were plotted in which the total energy absorbed was calculated. The deformation of aluminium honeycombs in indentation tests includes the compression of honeycomb cells under the indenter and tearing of honeycomb cell walls along the indenter edges. The energy dissipated in compression and tearing were calculated and discussed. The effects of cell size, cell wall thickness and loading velocity or strain rate on the plateau stress and energy absorption were analyzed. 1. Introduction Aluminium honeycombs are lightweight and have good energy absorption capabilities. They are widely used as core materials in various fields of engineering such as aerospace and automotive because of their extensive engineering properties. Some of the applications of aluminium honeycombs are landing gear door and flaps of aircraft. For example crushable aluminium honeycombs had been used in the Apollo 11 lading module. The large plastic deformation in hexagonal honeycombs is the main energy absorption region. It has been demonstrated that the plastic deformation and energy absorption characteristics of aluminium honeycombs depends on both the geometrical configuration and mechanical properties of cell wall materials [1, 2]. Cell size, cell wall thickness and strain rate are important parameters that affect plateau stress as well as impact response of aluminium honeycombs. Gibson and Ashby [1] pointed out that the deformation pattern and compressive strength varied with the direction of loads, for example, aluminium honeycombs strength is higher in the out-of plane direction compared with the two in-plane directions. A schematic diagram of aluminum honeycomb structure is shown in Figure 1. The cell wall thickness, t and 2t are known as single wall and double wall respectively. The cell edge length is denoted as l while h is the thickness of honeycomb. 3 To whom any correspondence should be addressed. Content from this work may be used under the terms of the Creative Commons Attribution 3. licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by Ltd 1

3 D2FAM 213 Buckling, folding, stretching, de-bonding and tearing are the major failure mechanisms of aluminium honeycombs. Many researchers [3-6] studied aluminium honeycombs experimentally, numerically and theoretically, to characterize their crushing behaviour and failure mechanism under both quasi-static and dynamic compression. Zhou and Mayer [7] conducted compressive and indentation punch tests on two types of aluminium honeycombs with different cell sizes (6.4 mm and 19.1 mm respectively). In compression, the honeycomb with larger cell size was found to be strain rate dependent, while the 3honeycomb with smaller cell size did not show evident strain rate sensitivity. Quasi-static tearing strength of honeycomb was defined, measured and calculated from the indentation punch tests. Two types of honeycombs deformed differently. However, since no dynamic indentation punch test was conducted, the strain rate sensitivity is still unknown. Figure 1. Schematic diagram of an aluminium honeycomb structure. In the present paper, out-of-plane quasi-static and dynamic indentations, and compressive tests have been conducted using MTS and high speed INSTRON machines to investigate tearing and compressive strengths. Three types of aluminium honeycombs having different cell sizes and wall thicknesses have been used in the experiment. For quasi-static tests, velocities of.5 mm/s,.5 mm/s and 5 mm/s were used and for dynamic tests a velocity of 5 m/s was used. The tearing and compressive strengths were calculated from the experimental results and the dependency of the dissipated energy on the loading speed was also discussed. 2. Experiments 2.1. Specification of materials and specimens HEXCELL aluminium honeycombs with different cell sizes and wall thicknesses were used in the experiments. The specific material used is aluminium alloy 52 with an H39 temper. The properties of three types of honeycombs are listed in Table 1. Each of the hexagonal honeycomb cell contain four single walls and two adjacent double walls of which all the cells are inter-connected to each other. The thickness of the double walls is twice of the single wall thickness. In compressive tests, honeycomb specimens used were 9 mm 9 mm. In indentation tests, honeycomb specimens used were 18 mm 18 mm. All honeycomb specimens were mm in height. The dimension of the indenter used in the indentation tests was a 9 mm 9 mm which covers at least 9 9 cells of all types of honeycombs studied. This cross-section of the indenter used was to ensure almost uniform compression of honeycomb cells. A circular plate with holes was used as fixed 2

4 D2FAM 213 platen where the honeycomb specimen was placed. In order to avoid specimen dis-connected with the platen rubber bands double sided tape was used to fasten the specimen in the platen. The holes in the circular plate are for the entrapped air to escape during testing. Therefore in this experiment the effect of entrapped air could be ignored. Table 1. HEXCELL 52 aluminium hexagonal honeycomb. Name Material Cell size D (mm) Cell wall thickness t (mm) Nominal Density ρ (kg/m 3 ) Modulus (GPa) Crush Strength (MPa) No. of cells covered by Indenter A 3.1-3/ N B 4.2-3/ N C 4.5-1/ N Quasi-static tests Figure 2. Out-of-plane quasi-static indentation tests conducted on the kn MTS machine. Out-of-plane quasi-static tests were conducted on an MTS machine (Model LPS.4) which had a load capacity of kn that could reach a velocity of mm/s. In the quasi-static tests, the specimens were placed on the lower fixed circular platen. The fixed platen consisted of holes around the centre to allow the entrapped air to escape during testing. Figure 2 shows the experimental setup of the MTS machine for quasi-static tests. The indenter was connected to the upper load cell which moved downwards to crush the specimens. Fixed position of the specimens on the circular platen was maintained for all the tests. Both indentation and compressive tests were conducted using the MTS machine at velocities of.5 mm/s,.5 mm/s and 5 mm/s respectively. The corresponding nominal strain rates were -3, -2 and -1 s -1 respectively for the specimen with a thickness of mm. Compressive force, F c, was measured in the compressive tests. The total force measured in the 3

5 D2FAM 213 indentation tests, F T, was the sum of the compressive force, F c, and tearing force, F t. Thus the tearing force could be calculated as, F t = F T F c Dynamic Tests Figure 3. Out-of-plane dynamic indentation tests conducted on the high speed INSTRON machine. Out-of-plane dynamic tests were conducted on a high speed INSTRON (VHS88) machine which has capacity to generate a maximum velocity of m/s. Both indentation and compressive tests were conducted at a velocity of 5 m/s. Figure 3 shows the experimental setup of the INSTRON machine for dynamic indentation tests. In the experiment the circular fixed platen was connected to the upper load cell. The specimens were attached to the fixed upper platen by using rubber bands for the indentation tests and specimens were fasten to the indenter by double-sided tape in compressive tests. The indenter was connected to the lower piston of the machine which moved upwards to apply the impact force to the specimens. 3. Results and Discussions The force-displacement curves of three types of aluminium honeycombs subjected to indentation and compressive loads at velocities of.5 mm/s,.5 mm/s 5 mm/s and 5 m/s are shown in Figures 4-7 respectively. It can be seen from Figures 4-7 that the plateau forces in the quasi-static tests (Figures 4-6) for all types of honeycomb specimens are generally constant. While in the dynamic tests (5 m/s, Figure 7) the transient forces fluctuate significantly in the plateau region. The average plateau force was calculated by taking the average force within a displacement range of 3-38 mm. The mean plateau stress was calculated as the ratio of average force to the crosssectional area of the honeycomb specimen. The mean plateau stresses of three different honeycomb materials at different velocities,.5 mm/s,.5 mm/s, 5mm/s and 5m/s are listed in Table 2. It has been observed that the mean plateau stress in both indentation and compressive tests increases with the increase in velocity. However, the tearing strength, F t = F T F c, did not show any trend with the change of the velocity. The area under the force-displacement curve is the total energy absorbed by honeycombs. The energy absorbed by honeycombs in compression, E c, is the area under the force-displacement curves recorded in compressive tests. 4

6 D2FAM A1 B1 C (a) 4 A2 B2 C (b) Figure 4. Quasi-static force-displacement curves of three types of aluminium honeycombs at a loading velocity of.5 mm/s in: (a) indentation tests; (b) compressive tests. 5

7 D2FAM A3 B3 C (a) 4 A4 B4 C (b) Figure 5. Quasi-static force-displacement curves of three types of aluminium honeycombs at a loading velocity of.5 mm/s in: (a) indentation tests; (b) compressive tests 6

8 D2FAM A5 B5 C (a) 4 A6 B6 C (b) Figure 6. Quasi-static force-displacement curves of three types of aluminium honeycombs at a loading velocity of 5 mm/s in: (a) indentation tests; (b) compressive tests 7

9 D2FAM A7 B7 C (a) 6 4 A8 B8 C (b) Figure 7. Dynamic force-displacement curves of three types of aluminium honeycombs at a loading velocity of 5 m/s in: (a) indentation tests; (b) compressive tests The total energy absorbed by honeycombs in indentation, E T, is the area under the forcedisplacement curves recorded in indentation tests and listed in Table 3. Since both compression of 8

10 D2FAM 213 honeycomb cells and tearing along the 4 edges of honeycomb specimen occurred simultaneously in the indentation of honeycombs, the total energy dissipated in tearing, E t, is calculated by the difference of E T and E c. The percentages of compressive energy, E c, and tearing energy, E t, at different strain rates are listed in the Table 3. For honeycombs material 3.1-3/ N (A1, A3, A5, A7) the percentage of compression and tearing energies varied in the range of 83% - 87% and 13% - 17% respectively. For the honeycomb material 4.5-1/ N (B1, B3, B5, B7) the percentages for compression energy and tearing energies were similar to those for honeycombs material 3.1-3/ N. However, for honeycombs material 4.2-3/ N the percentages of compression and tearing energies varied in the range of 7% - 74% and 26% - % respectively, i.e. the tearing energy was higher than that of the other two types honeycomb materials. This is mainly due to the thicker cell walls of honeycomb material (4.2-3/ N) compared with the other two types of honeycomb materials. However, the tearing energy, E t = E T E c, did not change significantly with loading velocity. Table 2. Summary of experimental results Test no. Material Test type t/l Velocity (m/s) Mean plateau stress σ pl (MPa) Total Dissipated energy (J) A / N Indentation A / N Compression A / N Indentation A / N Compression A / N Indentation A / N Compression A / N Indentation A / N Compression B / N Indentation B / N Compression B / N Indentation B / N Compression B / N Indentation B / N Compression B / N Indentation B / N Compression C / N Indentation C / N Compression C / N Indentation

11 D2FAM 213 C / N Compression C / N Indentation C / N Compression C / N Indentation C / N Compression Test no. Table 3. Effect of strain rate on the dissipated energy Strain rate (s -1 ) Compression energy % Tearing energy % A A A A B1 3 7 B3 2 7 B B C C C C Conclusions The out-of-plane indentation and compression behaviours of three types of aluminium honeycombs were investigated experimentally by using an MTS machine and a high speed INSTRON machine. In both quasi-static and dynamic tests, constant velocity was achieved in all tests. Force-displacement curves were recorded in all tests and presented. Mean plateau stress and energy absorbed in compression and indentation of honeycombs were calculated. Results indicated that both mean plateau stress and total energy absorbed in compression and indentation increased with the density of honeycombs and loading velocity or strain rate. The tearing strength and tearing energies increased with the cell wall thickness of honeycomb, no trend was observed with the change of loading velocity or strain rate in this study. Further detailed study will be carried out in the near future with a focus on the strain rate effect on tearing strength and energy. Acknowledgements The authors are grateful to Swinburne University of Technology for the financial support through a postgraduate scholarship, the Australia Research Council for the financial support through a Discovery grant and Dr Shanqing Xu for his help in the experiments.

12 D2FAM 213 References [1] Gibson L J and Ashby M F 1997 Cellular solids: structure and properties 2nd ed. (Cambridge: Cambridge University Press) [2] Yamashita M and Gotoh M 25 Int. J. of Impact Eng [3] Zhang J and Ashby M F 1992 Int. J. of Mech. Sci [4] Xu S, Beynon J H, Ruan D and Lu G 212 Compos. Struct [5] Masters I G and Evans K E 1996 Compos. Struct [6] Wierzbicki T 1983 Int. J. of Impact Eng [7] Zhou Q and Mayer R R 22 J. Eng. Mater.-T ASME

INDENTATION RESISTANCE OF AN ALUMINIUM FOAM

INDENTATION RESISTANCE OF AN ALUMINIUM FOAM Scripta mater. 43 (2000) 983 989 www.elsevier.com/locate/scriptamat INDENTATION RESISTANCE OF AN ALUMINIUM FOAM O.B. Olurin, N.A. Fleck and M.F. Ashby Cambridge University Engineering Department, Cambridge,

More information

Shock wave speed and stress-strain relation of aluminium honeycombs under dynamic compression

Shock wave speed and stress-strain relation of aluminium honeycombs under dynamic compression EPJ Web of Conferences 83, 7 (8) DYMAT 8 https://doi.org/.5/epjconf/8837 Shock wave speed and stress-strain relation of aluminium honeycombs under dynamic compression Peng Wang,*, Jun Zhang, Haiying Huang,

More information

Expansion of circular tubes by rigid tubes as impact energy absorbers: experimental and theoretical investigation

Expansion of circular tubes by rigid tubes as impact energy absorbers: experimental and theoretical investigation Expansion of circular tubes by rigid tubes as impact energy absorbers: experimental and theoretical investigation M Shakeri, S Salehghaffari and R. Mirzaeifar Department of Mechanical Engineering, Amirkabir

More information

Size Effects In the Crushing of Honeycomb Structures

Size Effects In the Crushing of Honeycomb Structures 45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics & Materials Conference 19-22 April 2004, Palm Springs, California AIAA 2004-1640 Size Effects In the Crushing of Honeycomb Structures Erik C.

More information

SIZE EFFECTS IN THE COMPRESSIVE CRUSHING OF HONEYCOMBS

SIZE EFFECTS IN THE COMPRESSIVE CRUSHING OF HONEYCOMBS 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Con 22-25 April 2002, Denver, Colorado SIZE EFFECTS IN THE COMPRESSIVE CRUSHING OF HONEYCOMBS Erik C. Mellquistand Anthony M.

More information

Analysis of flow characteristics of a cam rotor pump

Analysis of flow characteristics of a cam rotor pump IOP Conference Series: Materials Science and Engineering OPEN ACCESS Analysis of flow characteristics of a cam rotor pump To cite this article: Y Y Liu et al 2013 IOP Conf. Ser.: Mater. Sci. Eng. 52 032023

More information

Lateral Crushing of Square and Rectangular Metallic Tubes under Different Quasi-Static Conditions

Lateral Crushing of Square and Rectangular Metallic Tubes under Different Quasi-Static Conditions Vol:, No:1, 2 Lateral Crushing of Square and Rectangular Metallic Tubes under Different Quasi-Static Conditions Sajjad Dehghanpour, Ali Yousefi International Science Index, Mechanical and Mechatronics

More information

New insights into the collapsing of cylindrical thin-walled tubes under axial impact load

New insights into the collapsing of cylindrical thin-walled tubes under axial impact load 869 New insights into the collapsing of cylindrical thin-walled tubes under axial impact load M Shakeri, R Mirzaeifar, and S Salehghaffari Department of Mechanical Engineering, Amirkabir University of

More information

EXPERIMENTAL AND FINITE ELEMENT ANALYSIS OF MULTILAYERED HONEYCOMB COMPOSITE MATERIAL SUBJECT TO STATIC LOADING

EXPERIMENTAL AND FINITE ELEMENT ANALYSIS OF MULTILAYERED HONEYCOMB COMPOSITE MATERIAL SUBJECT TO STATIC LOADING U.P.B. Sci. Bull., Series B, Vol. 79, Iss. 3, 2017 ISSN 1454-2331 EXPERIMENTAL AND FINITE ELEMENT ANALYSIS OF MULTILAYERED HONEYCOMB COMPOSITE MATERIAL SUBJECT TO STATIC LOADING Cormos RAUL 1, Horia-Alexandru

More information

The University of Melbourne Engineering Mechanics

The 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 information

CHAPTER 3 THE EFFECTS OF FORCES ON MATERIALS

CHAPTER 3 THE EFFECTS OF FORCES ON MATERIALS CHAPTER THE EFFECTS OF FORCES ON MATERIALS EXERCISE 1, Page 50 1. A rectangular bar having a cross-sectional area of 80 mm has a tensile force of 0 kn applied to it. Determine the stress in the bar. Stress

More information

Reliability analysis of different structure parameters of PCBA under drop impact

Reliability 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 information

Lecture 4 Honeycombs Notes, 3.054

Lecture 4 Honeycombs Notes, 3.054 Honeycombs-In-plane behavior Lecture 4 Honeycombs Notes, 3.054 Prismatic cells Polymer, metal, ceramic honeycombs widely available Used for sandwich structure cores, energy absorption, carriers for catalysts

More information

Mechanics of Materials and Structures

Mechanics of Materials and Structures Journal of Mechanics of Materials and Structures QUASI-STATIC PUNCH INDENTATION OF A HONEYCOMB SANDWICH PLATE: EXPERIMENTS AND MODELLING Dirk Mohr, Zhenyu Xue and Ashkan Vaziri Volume 1, Nº 3 March 2006

More information

Three-dimensional stiff cellular structures with negative Poisson's ratio

Three-dimensional stiff cellular structures with negative Poisson's ratio ! Three-dimensional stiff cellular structures with negative Poisson's ratio Dong Li a, Jie Ma a, Liang Dong b and Roderic S. Lakes c a College of Sciences, Northeastern University, Shenyang 110819, PR

More information

Lecture 7, Foams, 3.054

Lecture 7, Foams, 3.054 Lecture 7, Foams, 3.054 Open-cell foams Stress-Strain curve: deformation and failure mechanisms Compression - 3 regimes - linear elastic - bending - stress plateau - cell collapse by buckling yielding

More information

Proceedings of the ASME th International Conference on Ocean, Offshore and Arctic Engineering OMAE2016 June 19-24, 2016, Busan, South Korea

Proceedings of the ASME th International Conference on Ocean, Offshore and Arctic Engineering OMAE2016 June 19-24, 2016, Busan, South Korea Proceedings of the ASME 26 35th International Conference on Ocean, Offshore and Arctic Engineering OMAE26 June 9-24, 26, Busan, South Korea OMAE26-54554 LOCAL STRAIN AND STRESS CALCULATION METHODS OF IRREGULAR

More information

Computational Simulation of Dynamic Response of Vehicle Tatra T815 and the Ground

Computational Simulation of Dynamic Response of Vehicle Tatra T815 and the Ground IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS Computational Simulation of Dynamic Response of Vehicle Tatra T815 and the Ground To cite this article: Jozef Vlek and Veronika

More information

Natural frequency analysis of fluid-conveying pipes in the ADINA system

Natural frequency analysis of fluid-conveying pipes in the ADINA system Journal of Physics: Conference Series OPEN ACCESS Natural frequency analysis of fluid-conveying pipes in the ADINA system To cite this article: L Wang et al 2013 J. Phys.: Conf. Ser. 448 012014 View the

More information

Compact energy absorbing cellular structure

Compact energy absorbing cellular structure Structures Under Shock and Impact IX 413 Compact energy absorbing cellular structure M. Ali 1, A. Qamhiyah 2, D. Flugrad 1 & M. Shakoor 1 1 Department of Mechanical Engineering, Iowa State University,

More information

Elastic Modulus Prediction of Corrugating Medium under Different Temperature and Relative Humidity

Elastic Modulus Prediction of Corrugating Medium under Different Temperature and Relative Humidity IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Elastic Modulus Prediction of Corrugating Medium under Different emperature and Relative Humidity o cite this article: Dongmei

More information

Composite Sandwich Structures with Honeycomb Core subjected to Impact

Composite Sandwich Structures with Honeycomb Core subjected to Impact Clemson University TigerPrints All Theses Theses 12-212 Composite Sandwich Structures with Honeycomb Core subjected to Impact Lei He Clemson University, he6@clemson.edu Follow this and additional works

More information

Self-weight loading of horizontal hydraulic cylinders with axial load

Self-weight loading of horizontal hydraulic cylinders with axial load Journal of Physics: Conference Series PAPER OPEN ACCESS Self-weight loading of horizontal hydraulic cylinders with axial load Related content - Stability analysis of large slenderness ratio horizontal

More information

BALLISTIC IMPACT RESPONSE OF AN ALUMINUM SANDWICH PANEL WITH AUXETIC HONEYCOMB CORE STRUCTURE

BALLISTIC IMPACT RESPONSE OF AN ALUMINUM SANDWICH PANEL WITH AUXETIC HONEYCOMB CORE STRUCTURE 16 Military Technical College Kobry El-Kobbah, Cairo, Egypt. 17 th International Conference on Applied Mechanics and Mechanical Engineering. BALLISTIC IMPACT RESPONSE OF AN ALUMINUM SANDWICH PANEL WITH

More information

Vibration analysis of concrete bridges during a train pass-by using various models

Vibration analysis of concrete bridges during a train pass-by using various models Journal of Physics: Conference Series PAPER OPEN ACCESS Vibration analysis of concrete bridges during a train pass-by using various models To cite this article: Qi Li et al 2016 J. Phys.: Conf. Ser. 744

More information

Mechanics of Energy Absorption by Progressive Plastic Deformation of a Square Column with an Ellipsoidal Bulge Base

Mechanics of Energy Absorption by Progressive Plastic Deformation of a Square Column with an Ellipsoidal Bulge Base Appl. Math. Inf. Sci. 9, No. 1L, 51-58 (015) 51 Applied Mathematics & Information Sciences An International Journal http://dx.doi.org/10.1785/amis/091l06 Mechanics of Energy Absorption by Progressive Plastic

More information

IOP Conference Series: Materials Science and Engineering. Related content PAPER OPEN ACCESS

IOP Conference Series: Materials Science and Engineering. Related content PAPER OPEN ACCESS IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Distributions of energy storage rate and microstructural evolution in the area of plastic strain localization during uniaxial

More information

Numerical Prediction of the Cracks Effect on the Square Origami Tube

Numerical Prediction of the Cracks Effect on the Square Origami Tube Master's Degree Thesis ISRN: BTH-AMT-EX--2013/D14--SE Numerical Prediction of the Cracks Effect on the Square Origami Tube Tianchen Feng Department of Mechanical Engineering Blekinge Institute of Technology

More information

Mechanics of Materials and Structures

Mechanics of Materials and Structures Journal of Mechanics of Materials and Structures THE SHEAR RESPONSE OF METALLIC SQUARE HONEYCOMBS François Cote, Vikram S. Deshpande and Norman A. Fleck Volume 1, Nº 7 September 26 mathematical sciences

More information

Effect of magnetostrictive material layer on the stress and deformation behaviour of laminated structure

Effect of magnetostrictive material layer on the stress and deformation behaviour of laminated structure IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Effect of magnetostrictive material layer on the stress and deformation behaviour of laminated structure To cite this article:

More information

Mechanics of Solids. Mechanics Of Solids. Suraj kr. Ray Department of Civil Engineering

Mechanics 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 information

Effect of Deformation Mode of Cylindrical Tubes with Corrugated Surface Dimensional Errors

Effect of Deformation Mode of Cylindrical Tubes with Corrugated Surface Dimensional Errors Proceedings of the 8th International Conference on Innovation & Management 5 Effect of Deformation Mode of Cylindrical Tubes with Corrugated Surface Dimensional Errors Shigeyuki Haruyama, Daiheng Chen,

More information

Bending Load & Calibration Module

Bending Load & Calibration Module Bending Load & Calibration Module Objectives After completing this module, students shall be able to: 1) Conduct laboratory work to validate beam bending stress equations. 2) Develop an understanding of

More information

Burst Pressure Prediction of Multiple Cracks in Pipelines

Burst Pressure Prediction of Multiple Cracks in Pipelines IOP Conference Series: Materials Science and Engineering OPEN ACCESS Burst Pressure Prediction of Multiple Cracks in Pipelines To cite this article: N A Razak et al 2013 IOP Conf. Ser.: Mater. Sci. Eng.

More information

Behavior of Tubular Hat Structure Under Three Point Bending

Behavior of Tubular Hat Structure Under Three Point Bending International Journal of Transportation Engineering and Technology 2016; 2(5-1): 18-24 http://www.sciencepublishinggroup.com j/ijtet doi: 10.11648/j.ijtet.s.2016020501.14 Behavior of Tubular Hat Structure

More information

ANALYSIS AND DEVELOPMENT OF ENERGY ABSORBING CRASH BOX

ANALYSIS AND DEVELOPMENT OF ENERGY ABSORBING CRASH BOX ANALYSIS AND DEVELOPMENT OF ENERGY ABSORBING CRASH BOX Dhananjay D.Desai 1, Prof.M.A.Kadam 2 1 Student, M.Tech CAD-CAM, Bharati Vidyapeeth Deemed University College of Engineering Pune, Maharashtra, India.

More information

SIMPLIFIED 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: 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 information

TESTING AND ANALYSIS OF COMPOSITE SANDWICH BEAMS

TESTING AND ANALYSIS OF COMPOSITE SANDWICH BEAMS TESTING AND ANALYSIS OF COMPOSITE SANDWICH BEAMS I. M. Daniel, J. L. Abot, and K. A. Wang Walter P. Murphy Professor, Departments of Civil and Mechanical Engineering, Robert R. McCormick School of Engineering

More information

Dynamic crushing of uniform and density graded cellular structures based on the circle arc model

Dynamic crushing of uniform and density graded cellular structures based on the circle arc model 1102 Dynamic crushing of uniform and density graded cellular structures based on the circle arc model Abstract A new circle-arc model was established to present the cellular structure. Dynamic response

More information

MODELLING OF THE BEHAVIOUR OF ARAMID FOLDED CORES UP TO GLOBAL CRUSHING

MODELLING OF THE BEHAVIOUR OF ARAMID FOLDED CORES UP TO GLOBAL CRUSHING MODELLING OF THE BEHAVIOUR OF ARAMID FOLDED CORES UP TO GLOBAL CRUSHING E. Baranger, C. Cluzel, P.-A. Guidault, O. Allix LMT-Cachan (ENS Cachan/CNRS/UPMC/PRES UniverSud Paris) 61 av. du Président Wilson,

More information

Indentation failure analysis of sandwich beams

Indentation failure analysis of sandwich beams Composite Structures 50 (2000) 311±318 www.elsevier.com/locate/compstruct Indentation failure analysis of sandwich beams A. Petras, M.P.F. Sutcli e * Department of Engineering, Cambridge University, Trumpington

More information

Design and Development of Impact Load Sensor for Dynamic Testing Purposes

Design and Development of Impact Load Sensor for Dynamic Testing Purposes IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Design and Development of Impact Load Sensor for Dynamic Testing Purposes To cite this article: E Permana and Yayat 2018 IOP Conf.

More information

Process for design optimization of honeycomb core sandwich panels for blast load mitigation

Process for design optimization of honeycomb core sandwich panels for blast load mitigation Struct Multidisc Optim DOI 10.1007/s00158-012-0845-x INDUSTRIAL APPLICATION Process for design optimization of honeycomb core sandwich panels for blast load mitigation S. K. Nayak A. K. Singh A. D. Belegundu

More information

Damping of materials and members in structures

Damping of materials and members in structures Journal of Physics: Conference Series Damping of materials and members in structures To cite this article: F Orban 0 J. Phys.: Conf. Ser. 68 00 View the article online for updates and enhancements. Related

More information

Damage accumulation model for aluminium-closed cell foams subjected to fully reversed cyclic loading

Damage accumulation model for aluminium-closed cell foams subjected to fully reversed cyclic loading Fatigue & Fracture of Engineering Materials & Structures doi: 10.1111/j.1460-2695.2011.01591.x Damage accumulation model for aluminium-closed cell foams subjected to fully reversed cyclic loading H. PINTO

More information

IOP Conference Series: Materials Science and Engineering. Related content PAPER OPEN ACCESS

IOP Conference Series: Materials Science and Engineering. Related content PAPER OPEN ACCESS IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Comparative study of the influence of friction forces on cold forming processes in conventional ECAP die and ECAP die with low

More information

The Pennsylvania State University. The Graduate School. Department of Mechanical and Nuclear Engineering

The Pennsylvania State University. The Graduate School. Department of Mechanical and Nuclear Engineering The Pennsylvania State University The Graduate School Department of Mechanical and Nuclear Engineering OPTIMIZATION OF HONEYCOMB CORE SANDWICH PANEL TO MITIGATE THE EFFECTS OF AIR BLAST LOADING A Thesis

More information

Quasi-static response and multi-objective crashworthiness. optimization of oblong tube under lateral loading

Quasi-static response and multi-objective crashworthiness. optimization of oblong tube under lateral loading Quasi-static response and multi-objective crashworthiness optimization of oblong tube under lateral loading A.Baroutaji a, E.Morris a, A.G.Olabi b (a) School of Mechanical and Manufacturing Engineering,

More information

Assessment Methods of Mechanical Properties of Composite Materials

Assessment Methods of Mechanical Properties of Composite Materials Mechanics and Mechanical Engineering Vol. 21, No. 4 (2017) 1005 1018 c Lodz University of Technology Assessment Methods of Mechanical Properties of Composite Materials Monika Kamocka Radoslaw J. Mania

More information

Stress Distribution in Graded Cellular Materials Under Dynamic Compression

Stress Distribution in Graded Cellular Materials Under Dynamic Compression 1251 Stress Distribution in Graded Cellular Materials Under Dynamic Compression Abstract Dynamic compression behaviors of density-homogeneous and density-graded irregular honeycombs are investigated using

More information

Lecture #10: Anisotropic plasticity Crashworthiness Basics of shell elements

Lecture #10: Anisotropic plasticity Crashworthiness Basics of shell elements Lecture #10: 151-0735: Dynamic behavior of materials and structures Anisotropic plasticity Crashworthiness Basics of shell elements by Dirk Mohr ETH Zurich, Department of Mechanical and Process Engineering,

More information

LARGE DEFLECTION OF GEOMETRICALLY ASYMMETRIC METAL FOAM CORE SANDWICH BEAM TRANSVERSELY LOADED BY A FLAT PUNCH

LARGE DEFLECTION OF GEOMETRICALLY ASYMMETRIC METAL FOAM CORE SANDWICH BEAM TRANSVERSELY LOADED BY A FLAT PUNCH International Journal of Aerospace and Lightweight Structures Vol. 1, No. 1 (2011) 23 46 c Research Publishing Services DOI: 10.3850/S2010428611000079 LARGE DEFLECTION OF GEOMETRICALLY ASYMMETRIC METAL

More information

Experimental and numerical investigations of heat transfer and thermal efficiency of an infrared gas stove

Experimental and numerical investigations of heat transfer and thermal efficiency of an infrared gas stove IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Experimental and numerical investigations of heat transfer and thermal efficiency of an infrared gas stove To cite this article:

More information

NORMAL 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. 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 information

Energy absorption of an egg-box material

Energy absorption of an egg-box material Journal of the Mechanics and Physics of Solids 51 (2003) 187 208 www.elsevier.com/locate/jmps Energy absorption of an egg-box material V.S. Deshpande, N.A. Fleck Department of Engineering, Cambridge University,

More information

ME 243. Mechanics of Solids

ME 243. Mechanics of Solids ME 243 Mechanics of Solids Lecture 2: Stress and Strain Ahmad Shahedi Shakil Lecturer, Dept. of Mechanical Engg, BUET E-mail: sshakil@me.buet.ac.bd, shakil6791@gmail.com Website: teacher.buet.ac.bd/sshakil

More information

Prediction of Elastic Constants on 3D Four-directional Braided

Prediction of Elastic Constants on 3D Four-directional Braided Prediction of Elastic Constants on 3D Four-directional Braided Composites Prediction of Elastic Constants on 3D Four-directional Braided Composites Liang Dao Zhou 1,2,* and Zhuo Zhuang 1 1 School of Aerospace,

More information

Mechanical Properties of Materials

Mechanical Properties of Materials Mechanical Properties of Materials Strains Material Model Stresses Learning objectives Understand the qualitative and quantitative description of mechanical properties of materials. Learn the logic of

More information

Fluid structure interaction dynamic analysis of a mixed-flow waterjet pump

Fluid structure interaction dynamic analysis of a mixed-flow waterjet pump IOP Conference Series: Materials Science and Engineering OPEN ACCESS Fluid structure interaction dynamic analysis of a mixed-flow waterjet pump To cite this article: X W Pan et al 2013 IOP Conf. Ser.:

More information

Lecture #2: Split Hopkinson Bar Systems

Lecture #2: Split Hopkinson Bar Systems Lecture #2: Split Hopkinson Bar Systems by Dirk Mohr ETH Zurich, Department of Mechanical and Process Engineering, Chair of Computational Modeling of Materials in Manufacturing 2015 1 1 1 Uniaxial Compression

More information

Design of a fastener based on negative Poisson's ratio foam adapted from

Design of a fastener based on negative Poisson's ratio foam adapted from 1 Design of a fastener based on negative Poisson's ratio foam adapted from Choi, J. B. and Lakes, R. S., "Design of a fastener based on negative Poisson's ratio foam", Cellular Polymers, 10, 205-212 (1991).

More information

Free Body Diagram: Solution: The maximum load which can be safely supported by EACH of the support members is: ANS: A =0.217 in 2

Free Body Diagram: Solution: The maximum load which can be safely supported by EACH of the support members is: ANS: A =0.217 in 2 Problem 10.9 The angle β of the system in Problem 10.8 is 60. The bars are made of a material that will safely support a tensile normal stress of 8 ksi. Based on this criterion, if you want to design the

More information

Modeling the elastic properties of paper honeycomb panels using the finite element method

Modeling the elastic properties of paper honeycomb panels using the finite element method Proceedings of the XXVI th International Conference Research for Furniture Industry Modeling the elastic properties of paper honeycomb panels using the finite element method Viktor UTASSY, Levente DÉNES

More information

C.J. Bennett, W. Sun Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham NG7 2RD, UK

C.J. Bennett, W. Sun Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham NG7 2RD, UK Optimisation of material properties for the modelling of large deformation manufacturing processes using a finite element model of the Gleeble compression test C.J. Bennett, W. Sun Department of Mechanical,

More information

Schur decomposition in the scaled boundary finite element method in elastostatics

Schur decomposition in the scaled boundary finite element method in elastostatics IOP Conference Series: Materials Science and Engineering Schur decomposition in the scaled boundary finite element method in elastostatics o cite this article: M Li et al 010 IOP Conf. Ser.: Mater. Sci.

More information

(48) CHAPTER 3: TORSION

(48) CHAPTER 3: TORSION (48) CHAPTER 3: TORSION Introduction: In this chapter structural members and machine parts that are in torsion will be considered. More specifically, you will analyze the stresses and strains in members

More information

Optimization of cross section of mobile crane boom using lagrange multiplier s method

Optimization of cross section of mobile crane boom using lagrange multiplier s method IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Optimization of cross section of mobile crane boom using lagrange multiplier s method To cite this article: J Daniel Glad Stephen

More information

FCP Short Course. Ductile and Brittle Fracture. Stephen D. Downing. Mechanical Science and Engineering

FCP Short Course. Ductile and Brittle Fracture. Stephen D. Downing. Mechanical Science and Engineering FCP Short Course Ductile and Brittle Fracture Stephen D. Downing Mechanical Science and Engineering 001-015 University of Illinois Board of Trustees, All Rights Reserved Agenda Limit theorems Plane Stress

More information

Indentation Energy in Bending of Sandwich Beams with Composite Laminated Faces and Foam Core

Indentation Energy in Bending of Sandwich Beams with Composite Laminated Faces and Foam Core Indentation Energy in Bending of Sandwich Beams with Composite Laminated Faces and Foam Core M. SADIGHI, H. POURIAYEVALI, and M. SAADATI Dept. of Mechanical Engineering, Amirkabir University of Tech, Tehran,

More information

Failure analysis of serial pinned joints in composite materials

Failure 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 information

Stress Analysis Lecture 3 ME 276 Spring Dr./ Ahmed Mohamed Nagib Elmekawy

Stress 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 information

Research on the defect types judgment in wind turbine blades using ultrasonic NDT

Research on the defect types judgment in wind turbine blades using ultrasonic NDT IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Research on the defect types judgment in wind turbine blades using ultrasonic NDT To cite this article: Suwei Li et al 05 IOP

More information

Crash Pendulum Energy Absorption Test System

Crash Pendulum Energy Absorption Test System TECHNICAL ARTICLE Crash Pendulum Energy Absorption Test System Mechanical Design and Manufacturing Department, Kocaeli University, Kocaeli, Turkey Keywords Crash, Energy Absorption, Test System, Momentum,

More information

Determination of Failure Point of Asphalt-Mixture Fatigue-Test Results Using the Flow Number Method

Determination of Failure Point of Asphalt-Mixture Fatigue-Test Results Using the Flow Number Method IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Determination of Failure Point of Asphalt-Mixture Fatigue-Test Results Using the Flow Number Method To cite this article: C E

More information

A RESEARCH ON NONLINEAR STABILITY AND FAILURE OF THIN- WALLED COMPOSITE COLUMNS WITH OPEN CROSS-SECTION

A RESEARCH ON NONLINEAR STABILITY AND FAILURE OF THIN- WALLED COMPOSITE COLUMNS WITH OPEN CROSS-SECTION A RESEARCH ON NONLINEAR STABILITY AND FAILURE OF THIN- WALLED COMPOSITE COLUMNS WITH OPEN CROSS-SECTION H. Debski a*, J. Bienias b, P. Jakubczak b a Faculty of Mechanical Engineering, Department of Machine

More information

The stiffness tailoring of megawatt wind turbine

The stiffness tailoring of megawatt wind turbine IOP Conference Series: Materials Science and Engineering OPEN ACCESS The stiffness tailoring of megawatt wind turbine To cite this article: Z M Li et al 2013 IOP Conf. Ser.: Mater. Sci. Eng. 52 052008

More information

Shear Behaviour of Fin Plates to Tubular Columns at Ambient and Elevated Temperatures

Shear Behaviour of Fin Plates to Tubular Columns at Ambient and Elevated Temperatures Shear Behaviour of Fin Plates to Tubular Columns at Ambient and Elevated Temperatures Mark Jones Research Student, University of Manchester, UK Dr. Yong Wang Reader, University of Manchester, UK Presentation

More information

Plastometry for the Self-Compacting Concrete Mixes

Plastometry for the Self-Compacting Concrete Mixes IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Plastometry for the Self-Compacting Concrete Mixes To cite this article: V Lapsa et al 2015 IOP Conf. Ser.: Mater. Sci. Eng. 96

More information

THE TRANSVERSE OFF-AXIS STIFFNESS AND STRENGTH OF SOFTWOODS. Abstract

THE TRANSVERSE OFF-AXIS STIFFNESS AND STRENGTH OF SOFTWOODS. Abstract THE TRANSVERSE OFF-AXIS STIFFNESS AND STRENGTH OF SOFTWOODS Carl S. Moden 1, Jessica Polycarpe 1 and Lars A. Berglund 2 1 Dept. of Aeronautical and Vehicle Engineering The Royal Institute of Technology

More information

9 MECHANICAL PROPERTIES OF SOLIDS

9 MECHANICAL PROPERTIES OF SOLIDS 9 MECHANICAL PROPERTIES OF SOLIDS Deforming force Deforming force is the force which changes the shape or size of a body. Restoring force Restoring force is the internal force developed inside the body

More information

Tensile behaviour of anti-symmetric CFRP composite

Tensile behaviour of anti-symmetric CFRP composite Available online at www.sciencedirect.com Procedia Engineering 1 (211) 1865 187 ICM11 Tensile behaviour of anti-symmetric CFRP composite K. J. Wong a,b, *, X. J. Gong a, S. Aivazzadeh a, M. N. Tamin b

More information

Presented by: Civil Engineering Academy

Presented by: Civil Engineering Academy Presented by: Civil Engineering Academy Structural Design and Material Properties of Steel Presented by: Civil Engineering Academy Advantages 1. High strength per unit length resulting in smaller dead

More information

Material property determination of the lining layers of a versatile helmet

Material property determination of the lining layers of a versatile helmet Material property determination of the lining layers of a versatile helmet Radek Kottner 1,*, Richard Hynek 1, Tomáš Mandys 1, Jan Bartošek 1 1 NTIS - New Technologies for the Information Society, Faculty

More information

August 3,1999. Stiffness and Strength Properties for Basic Sandwich Material Core Types UCRL-JC B. Kim, R.M. Christensen.

August 3,1999. Stiffness and Strength Properties for Basic Sandwich Material Core Types UCRL-JC B. Kim, R.M. Christensen. Preprint UCRL-JC-135347 Stiffness and Strength Properties for Basic Sandwich Material Core Types B. Kim, R.M. Christensen This article was submitted to ASME IMECE 99, Nashville, TN, November 14-19, 1999

More information

Modeling Damage and Damage Evolution in Periodic Cellular Sandwich Panels. Collins Ogundipe

Modeling Damage and Damage Evolution in Periodic Cellular Sandwich Panels. Collins Ogundipe Modeling Damage and Damage Evolution in Periodic Cellular Sandwich Panels by Collins Ogundipe A thesis submitted in conformity with the requirements for the degree of Master of Applied Science Graduate

More information

Heat Generation during the Fatigue of a Cellular Al Alloy

Heat Generation during the Fatigue of a Cellular Al Alloy Heat Generation during the Fatigue of a Cellular Al Alloy A. RABIEI, A.G. EVANS, and J.W. HUTCHINSON The heat generation from a notch during the compression-compression fatigue of a cellular Al alloy has

More information

A study on calculation method for mechanical impedance of air spring

A study on calculation method for mechanical impedance of air spring Journal of Physics: Conference Series PAPER OPEN ACCESS A study on calculation method for mechanical impedance of air spring To cite this article: SHAI Changgeng et al 6 J. Phys.: Conf. Ser. 744 8 View

More information

Revealing bending and force in a soft body through a plant root inspired. approach. Lucia Beccai 1* Piaggio 34, Pontedera (Italy)

Revealing bending and force in a soft body through a plant root inspired. approach. Lucia Beccai 1* Piaggio 34, Pontedera (Italy) Revealing bending and force in a soft body through a plant root inspired approach Chiara Lucarotti 1,2, Massimo Totaro 1, Ali Sadeghi 1, Barbara Mazzolai 1, Lucia Beccai 1* 1 Center for Micro-BioRobotics

More information

GLOBAL AND LOCAL LINEAR BUCKLING BEHAVIOR OF A CHIRAL CELLULAR STRUCTURE

GLOBAL AND LOCAL LINEAR BUCKLING BEHAVIOR OF A CHIRAL CELLULAR STRUCTURE GLOBAL AND LOCAL LINEAR BUCKLING BEHAVIOR OF A CHIRAL CELLULAR STRUCTURE Alessandro Spadoni, Massimo Ruzzene School of Aerospace Engineering Georgia Institute of Technology Atlanta, GA 30332 Fabrizio Scarpa

More information

GEOSYNTHETICS ENGINEERING: IN THEORY AND PRACTICE

GEOSYNTHETICS ENGINEERING: IN THEORY AND PRACTICE GEOSYNTHETICS ENGINEERING: IN THEORY AND PRACTICE Prof. J. N. Mandal Department of Civil Engineering, IIT Bombay, Powai, Mumbai 400076, India. Tel.022-25767328 email: cejnm@civil.iitb.ac.in Module-13 LECTURE-

More information

Collapse behaviour and simplified modeling of triangular cross-section columns

Collapse behaviour and simplified modeling of triangular cross-section columns Indian Journal of ngineering & Materials Sciences Vol. 16, April 2009, pp. 71-78 Collapse behaviour and simplified ing of triangular cross-section columns Yucheng Liu* Department of Mechanical ngineering,

More information

Module III - Macro-mechanics of Lamina. Lecture 23. Macro-Mechanics of Lamina

Module III - Macro-mechanics of Lamina. Lecture 23. Macro-Mechanics of Lamina Module III - Macro-mechanics of Lamina Lecture 23 Macro-Mechanics of Lamina For better understanding of the macromechanics of lamina, the knowledge of the material properties in essential. Therefore, the

More information

NUMERICAL ANALYSIS OF SANDWICH PANELS SUBJECTED TO POINT LOADS

NUMERICAL ANALYSIS OF SANDWICH PANELS SUBJECTED TO POINT LOADS ECCOMAS Congress 216 VII European Congress on Computational Methods in Applied Sciences and Engineering M. Papadrakakis, V. Papadopoulos, G. Stefanou, V. Plevris (eds.) Crete Island, Greece, 5 1 June 216

More information

A numerical parametric study on the plate inclination angle of steel plate shear walls

A numerical parametric study on the plate inclination angle of steel plate shear walls Journal of Structural Engineering & Applied Mechanics 219 Volume 1 Issue 4 164-173 https://doi.org/1.31462/jseam.219.1164173 www.goldenlightpublish.com RESEARCH ARTICLE A numerical parametric study on

More information

[5] Stress and Strain

[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 information

Keywords: Re-entrant; cellular solid; Negative Poisson s ratio; Voronoi; Energy absorption; Compression

Keywords: Re-entrant; cellular solid; Negative Poisson s ratio; Voronoi; Energy absorption; Compression Negative Poisson's ratio in 2D Voronoi cellular solids by biaxial compression: a numerical study Preprint: Li, D. Dong, L., Yin, J. and Lakes, R. S., "Negative Poisson's ratio in 2D Voronoi cellular solids

More information

TORQUE CAPACITY ENHANCEMENT OF A MAGNETORHEOLOGICAL FLUID CLUTCH USING THE SQUEEZE-STRENGTHEN EFFECT

TORQUE CAPACITY ENHANCEMENT OF A MAGNETORHEOLOGICAL FLUID CLUTCH USING THE SQUEEZE-STRENGTHEN EFFECT International Workshop SMART MATERIALS, STRUCTURES & NDT in AEROSPACE Conference NDT in Canada 2011 2-4 November 2011, Montreal, Quebec, Canada TORQUE CAPACITY ENHANCEMENT OF A MAGNETORHEOLOGICAL FLUID

More information

ANALYSIS OF YARN BENDING BEHAVIOUR

ANALYSIS OF YARN BENDING BEHAVIOUR ANALYSIS OF YARN BENDING BEHAVIOUR B. Cornelissen, R. Akkerman Faculty of Engineering Technology, University of Twente Drienerlolaan 5, P.O. Box 217; 7500 AE Enschede, the Netherlands b.cornelissen@utwente.nl

More information

Advanced Strength of Materials Prof S. K. Maiti Mechanical Engineering Indian Institute of Technology, Bombay. Lecture 27

Advanced Strength of Materials Prof S. K. Maiti Mechanical Engineering Indian Institute of Technology, Bombay. Lecture 27 Advanced Strength of Materials Prof S. K. Maiti Mechanical Engineering Indian Institute of Technology, Bombay Lecture 27 Last time we considered Griffith theory of brittle fracture, where in it was considered

More information

Thermal load-induced notch stress intensity factors derived from averaged strain energy density

Thermal load-induced notch stress intensity factors derived from averaged strain energy density Available online at www.sciencedirect.com Draft ScienceDirect Draft Draft Structural Integrity Procedia 00 (2016) 000 000 www.elsevier.com/locate/procedia 21st European Conference on Fracture, ECF21, 20-24

More information