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Mechanical Engineering Material response to micro structural mechanical thermal and biological stimuli Experiments

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Creep Transient Based On Obstacle Density

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Beginner

Intermediate

Advanced

1. What is Creep?

a: Time independent elastic deformation at constant temperature Explanation

Explanation

b: Time independent plastic deformation at constant temperature Explanation

Explanation

c: Time dependent elastic deformation at constant stress Explanation

Explanation

d: Time dependent permanent deformation at a constant stress Explanation

Explanation

2. Creep usually occurs at temperatures of: (where Tm is the melting point of the material).

a: < 0.2 Tm Explanation

Explanation

b: > 0.4 Tm Explanation

Explanation

c: at Tm Explanation

Explanation

d: > Tm Explanation

Explanation

3. In the primary/transient stage, the creep rate:

a: Remains zero Explanation

Explanation

b: Increases with time Explanation

Explanation

c: Remains constant (non zero) Explanation

Explanation

d: Decreases with time Explanation

Explanation

4. In the secondary /steady state, the creep rate:

a: Remains zero Explanation

Explanation

b: Increases with time Explanation

Explanation

c: Remains constant (non zero) Explanation

Explanation

d: Decreases with time Explanation

Explanation

5. In the tertiary state, the creep rate:

a: Remains zero Explanation

Explanation

b: Rapidly increases with time Explanation

Explanation

c: Remains constant (non zero) Explanation

Explanation

d: Rapidly decreases with time Explanation

Explanation

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