Many of the problems for Sections 2.1-2.4 require the determination of principal stresses and maximum shear stress, as well as the location of the planes on which they act. These quantities are required input in design and failure criteria for structural and mechanical systems.
The principal stresses σ1 and σ3 are known, and σ1 ≥ σ2 ≥ σ3. Determine the value of σ2 for which the octahedral shear stress τoct attains an extreme value.
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