Take an element at the center of the deformation zone in flat rolling. Assuming that all the

Question:

Take an element at the center of the deformation zone in flat rolling. Assuming that all the stresses acting on this element are principal stresses, indicate the stresses qualitatively, and state whether they are tensile or compressive. Explain your reasoning. Is it possible for all three principal stresses to be equal to each other in magnitude? Explain.