Briefly discuss the effect of σ​zz​​ as to whether the effect is significant, secondary, or insignificant, providing an explanation.

A block of AISI 1020 steel with a yield strength of 260 MPa is subjected to a compressive stress σ​ZZ​τ​xy
​ = -120 MPa and shear stress, ​​ .
A) What is the largest value of τ​XY​​ that can be applied if the safety factor against yielding must be equal to 2?
B) Is there a large effect of σ​zz​​ on the τ​xy​​ required to cause yielding? Briefly discuss the effect of σ​zz​​ as to whether the effect is significant, secondary, or insignificant, providing an explanation.
 
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