10-61. T he yield stress for a zirconium-magnesium alloy is s Y = 15.3 ksi. If a machine part is made of this material and a critical point in the material is subjected to in-plane principal stresses s 1 and s 2 = −0.5s 1, determine the magnitude of s 1 that will cause yielding according to the maximum-shear-stress theory. | |
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