5. Example

Try these first

1. 1.

   What is the Maximum Principal Stress Theory?

   Hint

   Think about how stress affects materials.

2. 2.

   Define Mohr's Circle.

   Hint

   Remember how it represents stresses graphically.

3. 3.

   What happens when the maximum principal stress exceeds the critical value?

   • Failure occurs
   • The material is safe
   • It leads to deformation

   Hint

   Recall what limits outline failure.

4. 4.

   True or False: The maximum shear stress theory and distortional energy theory are unrelated.

   • True
   • False

   Hint

   Consider their relationship to shear stress.

5. 5.

   You have a beam subjected to varying loads and torques in live scenarios. How would you use both Maximum Shear Stress and Distortional Energy Theory to assess safety?

   Hint

   Use experimental data from initial tests.

6. 6.

   A circular beam with maximum shear stress of 30 MPa and critical shear stress of 25 MPa fails under a load. Explain the design flaw based on failure theories.

   Hint

   Reflect on critical values necessary for safety.