2.1. Formulation

Try these first

1. 1.

   Define longitudinal strain.

   Hint

   What is the focus when you pull or compress a material?

2. 2.

   What does shear strain measure?

   Hint

   Think about angles between ice skaters' arms when they spin.

3. 3.

   What is the formula for longitudinal strain?

   • ΔL / L0
   • ΔX / Y
   • Length / Area

   Hint

   Consider how length changes in tension or compression.

4. 4.

   True or False: Shear strain only affects the length of materials.

   • True
   • False

   Hint

   Think about how shapes can distort while keeping their areas intact.

5. 5.

   Consider a beam fixed at one end. If a force pulls on the free end creating a longitudinal strain of 0.01, calculate the new length if the original was 2 m.

   Hint

   Use the formula for longitudinal strain.

6. 6.

   A rectangular sheet experiences a shear strain that reduces the right angle between its sides to 85 degrees. Calculate the angle change.

   Hint

   Use the formula for angle change in shear strain.