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the strains determined by the use of the rosette attached as shown during the test of a machine element are p1 5 293.1 3 1026 in./in. p2 5 1385 3 1026 in./in. p3 5 1210 3 1026 in./in. determine (a) the orientation and magnitude of the principal strains in the plane of the rosette, (b) the maximum in-plane shearing strain.