What are the equations that describe the ductile creep of rocks at low, moderately low (<200 MPa) and high stresses? Define the parameters and what are the typical “n” values.

Answer the questions given the following stresses: d) The value of the shear stress at any plane inclined at any angle with the horizontal is e) The value of the normal stress at any plane inclined at any angle with the horizontal is

A plate was subjected to a tensile force P=100 KN as shown on the figure. If the allowablestress is 250 MPa, Calculate the following:(a) Minimum required thickness of the plate. (Hint: HOLE vs FILLET) (b) Maximum allowable stress based on minimum thickness of the plate, Let K= 1.20 (c) Percent decrease on stress concentration