SPRING 2006, M/W 1:45pm - 4:05pm F 1:45pm 2:50pm Rm N201 Rm N201 Hours: MWF 10:00am-11:00am or By Appointment Professor Abraham Tchako, Ph.D., Dipl. Ing., SFI Department of Butterfield 301A 388-6144 tchakoa@union.edu
WHAT ARE WE GOING TO STUDY? The application of the mechanics of material to the design and analysis of machine components and systems.
WHAT WILL I LEARN? How to determine if components commonly found in mechanical machinery have adequate strength and safety. COMPONENTS STRENGTH -Cylinders -Rotating disks -Ductile -Fits -Shafts -Brittle -Keyways -Gear teeth -Yield -Bearings -Power screw -Fracture -Fasteners -Welds -Fatigue -Springs -Brakes/Clutches
PREREQUISITES MER 311 : Advanced Mechanics. MER 312 : Dynamics and Kinematics.
COURSE FORMAT AND MEETING TIME LECTURE: MW 1:45 4:05 pm F 1:45 2:50 pm The course does not have a lab component but carries a major design project. Friday classes will mostly be used to discuss the project design and to administer quizzes.
TEXT BOOKS: Mechanical Engineering Design, 7 th Ed., J.E. Shigley, C.R. Mischke, R. G. Budynas, McGraw Hill. Reference: Any Book on Machine Design
Course web site http://engineering.union.edu/~tchakoa/mer419 Course Guidelines Course Description ABET Statement Assignments Announcements Laboratories Project Exams
Course grades will be determined using these weights: 10% for homeworks 10% for quizzes 20% for Design Project 40% for exams (two) 20% for the final exam Letter grades are assigned as follows: 90 92 % A-, 93 100% A 80-83% B-, 84 86 % B, 87-89 % B+ 70-73% C-, 74 76% C, 77 79 % C+ 65-69% D.
WHAT IS EXPECTED OF ME? Attend Classes - It is professional to be ready and have good attendance. DO HOMEWORK - Homework is due on the scheduled date and time. - Keep a portfolio of all the home works: Will aid in studying for exams. Will facilitate grading
WHAT IS EXPECTED OF ME? - Submit a technical report on design project. - Pass two exam given during the term. - Pass the final comprehensive exam.
Homework Format -Use engineering paper - Show all the work -Be NEAT - Draw a sketch of the problem - Use pencil - Box the final answer - Write only on front side - Only one problem per sheet -Home due on scheduled date - 20% penalty per day for late hw -Write problem # on the sheet - Write your name on each sheet
Fundamental Concepts SI Units U.S. Customary Length meter (m) foot (ft) Time second (s) second (s) Mass kilogram (kg) slug (lb-s 2 /ft) Force Newton (N) pound (lb)
Fundamental Concepts SI Units U.S. Customary Stress meter (m) foot (ft) second (s) second (s) Mass kilogram (kg) slug (lb-s 2 /ft) Force newton (N) pound (lb)
Conversion of Units Quantity Customary Units SI Units Force lb 4.448 2 N Mass lb-s 2 /ft slug 14.593 8 kg Length ft 0.304 8 m
Conversion of Units Quantity Customary SI Units Units Pressure psi 6.895 kpa Torque Ft.lb 1.356 Nm Work Ft.lb 1.356 Joule Power Ft. lb/s 1.356 Watt Power hp 745.7 Watt
Prefixes Exponential Prefix SI Symbol Multiple 1 000 000 000 10 9 giga G 1 000 000 10 6 mega M 1 000 10 3 kilo k Submultiple 0.001 10-3 milli m 0.000 001 10-6 micro µ 0.000 000 001 10-9 nano n
Units of Stress SI Units Also Used Standard N/m 2 Pa Convenient N/mm 2 MPa MN/m 2 MPa
Strain Symbol Also Used Standard ε Convenient mε 10-3 µ µε 10-6 µ