HW7 ENME382 S10 Section0201

HW7 ENME382 S10 Section0201 - ENME382 Section 0201 Homework...

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ENME382 Section 0201 Homework 7 Due in class: Friday, April 9, 2010 1. What is meant by the term elastic strain? What is the equation that relates the applied stress to the elastic strain? b. What is meant the term plastic strain? Is there a simple equation that relates applied stress to plastic strain? c. When a sample is stressed, how do you know whether it will experience only elastic strain or elastic and plastic strain? d. Briefly describe one application where a material is likely to experience elastic strain. e. Briefly describe one situation where a material is likely to experience plastic strain. f. What is the name of the stress at which noticeable plastic deformation begins? g. What are two other names (synonyms) for modulus of elasticity? 2. a) For a brass alloy, the stress at which plastic deformation begins is 345 MPa (50,000 psi), and the modulus of elasticity is 103 GPa (15.0 × 10 6 psi). (i)
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This note was uploaded on 11/28/2010 for the course ENME 250 taught by Professor Shang during the Spring '10 term at Maryland.

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HW7 ENME382 S10 Section0201 - ENME382 Section 0201 Homework...

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