1. Need for stress-strain relation

Try these first

1. 1.

   Define stress in your own words.

   Hint

   Think about forces acting on surfaces.

2. 2.

   What is strain?

   Hint

   Consider how materials change shape under force.

3. 3.

   What do we call the relationship that joins stress and strain?

   • Elasticity Relation
   • Constitutive Relation
   • Equilibrium Relation

   Hint

   Think about how materials respond to applied forces.

4. 4.

   True or False: Stress can be defined as force over area.

   • True
   • False

   Hint

   Recall the basic definition of stress.

5. 5.

   Design a simple experiment to measure the stress-strain relationship in a material of your choice and outline the steps.

   Hint

   Consider the setup of forces and measurements you would need.

6. 6.

   Given a material with a specific stress-strain relation defined by σ = Eϵ, find the stress produced if the strain is 0.01 and E (Young's modulus) is 200 GPa.

   Hint

   Don't forget to convert units appropriately.