A rosette composed of three strain gages measures strain at


A rosette composed of three strain gages measures strain at a point on the surface of a flat sheet of annealed stainless steel loaded in plane stress. The strains measured (numbers correspond to strain gages in the figure) are
ε1 = +280 μstrain, ε2 = +720 μstrain, ε3 = -120 μstrain.

a. Find the in-plane strains at this point using the xy-axes shown.

b. Find the in-plane stresses at this point.

c. What is the percent change in thickness of the plate if this stress state is uniform over it?

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Mechanical Engineering: A rosette composed of three strain gages measures strain at
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