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1. What stress state is three-dimensional, plane, linear?
2. Which rule of signs for the normal and shear stresses?
3. Formulate the parity law of shear stresses.
4. What are the principal tensions and the principal plane?
5. What is the shear stress on the principal planes?
6. How do you identify the principal stresses in the case of the
plane stress state?
7. How do you determine the position of the principal planes in the
case of the plane stress state?
8. What are the extreme values of shear stresses in the case of the
plane stress state?
9. What are the planes of displacement and how can you find their
position?
10. Derive the formula expressing the generalized Hooke's law.
11. How do you determine the relative change of volume in the
case of spatial stress state?
12. What are the theories of strength and what are they for?
13. Formulate the first and second strength theory.
14. Describe the third and fourth strength theory.
15. Describe Mora’s theory of strength.

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