A 45 degree strain rosette is mounted on the surface of the shaft shown in torsion. Due to being part of a rosette, which strain gage can directly measure shear strain on the surface?
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Step 1: Recognize the strain state on the shaft surface under pure torsion — there are no normal strains in the axial (x) or circumferential (y) directions, only an engineering shear strain γ_xy (so ε_x = ε_y = 0 and γ_xy ≠ 0). Show more…
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