7.1. Special case: composite cylinder

Try these first

1. 1.

   What is a composite cylinder?

   Hint

   Think of where different materials are used together.

2. 2.

   What remains continuous in a composite cylinder when it is twisted?

   Hint

   Focus on the deformation properties.

3. 3.

   What happens to shear strain in a composite cylinder when twisted?

   • It becomes discontinuous
   • It remains continuous
   • It increases
   • It is zero

   Hint

   Think about how materials deform.

4. 4.

   True or False: Shear stress can be continuous at the boundary of two different materials.

   • True
   • False

   Hint

   Focus on the properties of shear stress.

5. 5.

   A composite cylinder is composed of an outer steel sleeve and an inner aluminum core. If the aluminum has a shear modulus of 25 GPa and the steel has a shear modulus of 80 GPa, and a torque of 500 Nm is applied, calculate the resulting shear stress in both materials if their common shear strain is 0.002.

   Hint

   Remember to apply the formula τ = G * γ for each material based on their shear moduli.

6. 6.

   Discuss how the choice of materials in composite cylinders affects their applications in environmental conditions like high temperatures or corrosive environments.

   Hint

   Think about the properties of materials and their environmental resistance.