1. Lecture 1 Overview Jiangyu Li University of Washington
ME 354
Mechanics of Materials Lab
Lecture 1
Overview
Jiangyu Li
University of Washington
Jiangyu Li, University of Washington

2. Jiangyu Li, University of Washington
Instructor and TAs
Instructor:
Prof. Jiangyu Li
(Tentative) Office hours: MW, 10:30-11:30 AM, MEB 207
TAs:
Mark Miller,
Peiqi Wang,
(Tentative) Office hour: Friday, 3:30-4:30 PM, MEB 236
Jiangyu Li, University of Washington

3. Jiangyu Li, University of Washington
Course Organization
Textbook:
Norman E. Dowling, Mechanical Behavior of Materials - Engineering Methods for Deformation, Fracture, and Fatigue, 2nd Custom Edition for the University of Washington, Pearson Custom Publish, Pearson
References:
James M. Gere, Mechanics of Materials, Brooks/Cole (CEE 220)
Joseph E. Shigley, Charles R. Mischke, and Richard G. Budynas, Mechanical Engineering Design, McGraw Hill (ME 356)
Website:
Jiangyu Li, University of Washington

4. Jiangyu Li, University of Washington
Schedule
LECTURES Monday, Tuesday, Wednesday: 9:30 ~ 10:20 am RECITATIONS and LAB PREPREATION (by TA) Friday: 9:30 ~ 10:20 am LABS (MEB 127) (AA) Monday: 2:30 – 5:20 pm (AB) Wednesday: 2:30 – 5:20 pm (AC) Thursday: 2:30 – 5:20 pm
Jiangyu Li, University of Washington

5. Jiangyu Li, University of Washington
Grading Policy (1)
Homework 25%
Lab reports X %
Formal Report X 2 20%
Memo / Short Report X 4 20%
Exam X 2 30%
No Final Exam
Quiz 5%
Bonus 2%
Jiangyu Li, University of Washington

6. Jiangyu Li, University of Washington
Grading Policy (2)
HOMEWORKS:
due before 12:00pm (NOON) on every Monday at the Mechanical Engineering Office. Unless arranged in advance, late homework will not be accepted.
LAB REPORTS:
Short report (Memo) are due at the beginning of the lab one week after the assignment;
Formal report is due two weeks after assignment
MID-TERM EXAMS (No FINAL EXAM)
2 midterm exams to be announced one week before exam date
Only under proven extraordinary circumstances will the makeup exam be given.
Jiangyu Li, University of Washington

7. Academic Accommodation
If you would like to request academic accommodations due to a disability, please contact Disabled Student Services, 448 Schmitz Hall, (206) (V/TDD).
Jiangyu Li, University of Washington

8. Jiangyu Li, University of Washington
Academic Dishonest
Cheating on exams and plagiarism in the preparation of homework are unacceptable. Academic sanctions will be taken against all parties involved in the act of cheating and/or plagiarism.
Jiangyu Li, University of Washington

9. Jiangyu Li, University of Washington
Classroom Conduct
Please be considerate of the learning mission of the class and refrain from activity that is disruptive
Jiangyu Li, University of Washington

10. Jiangyu Li, University of Washington
Lecture Topics
Beam, Energy method and unsymmetrical beam
Buckling
Stresses and strains, Mohr’s circle
Elasticity
failure
Plasticity
Torsion
Fracture
Impact
Creep and fatigue
Jiangyu Li, University of Washington

11. Lab Topics Beam (Wang) (Memo) Buckling (Miller) (Memo)
Tension (Wang) (FOMRAL REPORT)
Torsion (Miller) (FORMAL REPORT)
Fracture (Miller) (Memo)
Nanoidentation (Wang, MEB B012) (Memo)
Memo report is due 1 week from the date of experiment.
Long report is due 2 weeks from the date of experiment.
5 pm, ME Main office or TA during Lab sessions!
Jiangyu Li, University of Washington

12. Jiangyu Li, University of Washington
Assignment
Review Mechanics of Materials (CEE 220)
Read Note on Strain Gage
Read Note on Lab 1
Homework # 1 will be uploaded on Tuesday and is due on Monday!
Jiangyu Li, University of Washington

13. 3 modes of deformations

14. Formulation in Mechanics

15. Jiangyu Li, University of Washington
Beam
bridge
Probe
Cantilever beam + Tip
Jiangyu Li, University of Washington

16. Jiangyu Li, University of Washington
Beam
Jiangyu Li, University of Washington

17. Jiangyu Li, University of Washington
Types of Supports
Beam supported on a wall
Beam-to-column connection
Pole anchored to a concrete pier
Jiangyu Li, University of Washington

18. Jiangyu Li, University of Washington
Types of Beams
Jiangyu Li, University of Washington

19. Sign Convention

20. Shear Force & Bending Moment Diagrams

21. Shear Force & Bending Moment Diagrams
Example:
Jiangyu Li, University of Washington

22. Shear Force & Bending Moment Diagrams
Jiangyu Li, University of Washington

23. What can we get from V(x) and M(x) ?
Deflection, slope, curvature
Normal and Shear Stress
over cross section
Jiangyu Li, University of Washington

24. Jiangyu Li, University of Washington
A. Deflection of Beam
Jiangyu Li, University of Washington

25. Jiangyu Li, University of Washington
A. Deflection of Beam
Jiangyu Li, University of Washington

26. A. Deflection of Beam

27. Boundary conditions ~ geometry
Jiangyu Li, University of Washington

28. Continuity Conditions
Jiangyu Li, University of Washington

29. Deflection by Bending Moment Equation
Jiangyu Li, University of Washington

30. Deflection by Loading Equation
Jiangyu Li, University of Washington

31. Deflection by Superposition
Jiangyu Li, University of Washington

32. What can we get from V(x) and M(x) ?
Stresses and strains
Jiangyu Li, University of Washington

33. Jiangyu Li, University of Washington
Normal Stress
Equilibrium
Go through centroid !
Jiangyu Li, University of Washington

34. Jiangyu Li, University of Washington
Normal stresses
Jiangyu Li, University of Washington

35. Jiangyu Li, University of Washington

36. Jiangyu Li, University of Washington
Shear Stress
Jiangyu Li, University of Washington

37. Jiangyu Li, University of Washington
Shear Stress
Jiangyu Li, University of Washington

38. Distribution of Shear Stress
Jiangyu Li, University of Washington

39. Shear Stress in special cross sections
Jiangyu Li, University of Washington

40. Jiangyu Li, University of Washington
Shear Stress in I-Beam
Jiangyu Li, University of Washington

41. Jiangyu Li, University of Washington
Big Picture
Jiangyu Li, University of Washington

42. Jiangyu Li, University of Washington
Next ?
Energy method for beam deflection
Unsymmetrical beams
Curved beams
Jiangyu Li, University of Washington