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At a point in a plate subjected to plane stress loading along its surface, the cartesian stress components acting on the xface of an element oriented along the (x,y) frame are σx=40MPa and τxy=70MPa,
The maximum allowable shear stress, to prevent yielding of the material, is τo=74MPa.
What is the permissible range (minimum and maximum values in MPa) for the normal stress on the yface, σy, to ensure that the material will not yield?
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