Question

1) Explain why we require the failure criteria such as Tresca and Von-mises.
2) A steel plate is subjected to pure shear. The steel has a yield strength of 250 MPa. How much shear stress can the plate resist before it yields according to the Von-mises yield criterion.
3) A thin plate as shown in figure below is fixed at one end and is subjected to a shear and axial force at the free end. The plate dimensions are: length = 500 mm, depth = 100 mm, width = 10 mm. The shear force is equal to 30 kN and the axial force is equal to 90 kN. What is the minimum yield strength this material should have so that none of the three elements shown (marked as white squares) on this plate yield? ​

Answer 1

Answer:

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