Question

6. (15 pts) A rectangular strain gage rosette is mounted on a wing of an aircraft. Following strain values were obtained. Ea = 400 x10-6 in/inE= 10.4 x 106 psi

Eb = 100 x10-6 in/inv = 0.32 Ec = 250 x10-6 in/in i. Determine the principal strains. (draw Mohr's circle and to show a correct orientation of the "T" formed by a, b, and c) ii. Calculate the principal stresses. iii. Calculate the maximum shear strain (ymax).

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