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An element in plane stress is subjected to stresses σx= - 8400 psi, σy= 1100 psi, and τxy= -1700 psi (see figure). The material is aluminum with modulus of elasticity E= 10,000 ksi and Poisson's ratio 0.33.
Determine the following quantities:
(a) the strains for an element oriented at an angle θ = 30°,
(b) the principal strains, and
(c) the maximum shear strains. Show the results on sketches of properly oriented elements.
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