1.3. Plastic behavior

Try these first

1. 1.

   Define plastic behavior.

   Hint

   Think about what happens when materials are over-stressed.

2. 2.

   What is the yield point in materials?

   Hint

   It's the transition from elastic to plastic behavior.

3. 3.

   What happens to a material after it surpasses its yield point?

   • It returns to its original shape
   • It deforms permanently
   • It crumbles

   Hint

   Think about the distinction between elastic and plastic behavior.

4. 4.

   Elastic materials can revert to their original shape after stress is removed.

   • True
   • False

   Hint

   Recall what happens when you stretch a rubber band.

5. 5.

   A structural beam made of a ductile material is subjected to increasing loads. Analyze at which load condition it transitions from elastic to plastic behavior and what consequences that may have in design.

   Hint

   Focus on how yield point values are used in engineering safety factors.

6. 6.

   During a test, a glass panel is subjected to a static load beyond its elastic limit. What can be expected in terms of stress distribution and failure? Discuss the implications.

   Hint

   Remember the stress-strain behavior of brittle materials during excessive loading.