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Mechanics of Materials Lab ME 352

Mechanics of Materials Lab ME 352. Lecture 2 Dr. Mohammad A. Irfan Sept 8, 2014 13 Zul Qadha1435. Tentative Lecture Schedule:. Outline. Lab Report Writing Material Properties. a. How to write a Lab report. LAB REPORT. Title Page Objective Theory Apparatus Method Data & Graph

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Mechanics of Materials Lab ME 352

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  1. Mechanics of Materials LabME 352 Lecture 2 Dr. Mohammad A. Irfan Sept 8, 2014 13 Zul Qadha1435

  2. Tentative Lecture Schedule:

  3. Outline Lab Report Writing Material Properties

  4. a. How to write a Lab report

  5. LAB REPORT • Title Page • Objective • Theory • Apparatus • Method • Data & Graph • Error • Result & Discussion • Conclusion • References

  6. 1. Title page ME 352 Mechanics of Materials Lab Experiment No. 1 Tensile Test Name of Student: Pin Number Semester 342 (Spring 2014)

  7. 2. Objective The Objective of this experiment is to…… E.g. is to … find the Tensile Strength of the specimen 2-3 lines maximum New Times Roman/ Arial/ Calibri 12 font only

  8. 3. Theory Definition of ….. Formula Explain each constant/ variable in the formula

  9. 4. Apparatus Picture / Diagram of apparatus Name and company of apparatus Label the parts Function of apparatus How it works Specifications (maximum limit etc.)

  10. 5. Method Explain how you did the experiment Step 1 Step 2 Step 3 And so on

  11. 6. Data and Graph Error: Error in your reading

  12. 7. Result and Discussion Discuss the shape of graph Discuss the high point and low point of the graph Discuss the numbers obtained and compare it with published numbers Give References

  13. 8. Conclusions • Write the answer to the Objective • The following are the conclusions: • Yield Strength = • Tensile Strength = • Percentage Elongation = • Reduction in Area =

  14. 9. References Write References for every line you have read and written from some other book, research paper, technical report or website: e.g. Hibbeler, R.C., Mechanics of Materials, SI Second Edition, Pearson Hall, 2005. www.wikepidia.com assessed on April 4, 2014.

  15. Websites • www.astm.org • http://www.tensile.com/ • www.motabaqah.com

  16. Questions ?

  17. b. Mechanical properties of materials

  18. Properties of Materials Melting Point Boiling Point Thermal Conductivity Etc Constants

  19. Mechanical Properties of Materials Constant for one type of material Need a limit ( حد)of Load for any material Need a limiting property in Pulling (سحب) Need a limiting property in Pushing (ضغط) Need a limiting property in Twisting (لي ) Need a limiting property in Hitting (ضرب ) Etc.

  20. Limiting property in Pulling (سحب) Pulling = Tension Tensile Test Uni Axial Tensile Test

  21. Uni- axial Tensile Test Engineering Stress: = F/Ao Engineering Strain: = ΔL/Lo

  22. Stress- Strain Curve (Engineering)

  23. TENSILE STRENGTH, UTS • Maximum possible engineering stress in tension. Adapted from Fig. 6.11, Callister 6e. 17

  24. DUCTILITY, %ELONGATION Adapted from Fig. 6.13, Callister 6e. • Another ductility measure: 19

  25. HARDNESS • Resistance to permanent dent on the surface. • Adapted from Fig. 6.18, Callister 6e. (Fig. 6.18 is adapted from G.F. Kinney, Engineering Properties and Applications of Plastics, p. 202, John Wiley and Sons, 1957.) 21

  26. Hardness Brinnel Hardness Rockwell Hardness

  27. Animation of Indentation

  28. Impact Properties

  29. Impact properties

  30. Questions?

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