10-28. The 60° strain rosette is mounted on a beam. The following readings are obtained from each gauge: P a = 250(10 −6 ), P b = −400(10 −6 ), P c = 280(10 −6 ). Determine ( a) the in-plane principal strains and their orientation, and ( b) the maximum in-plane shear strain and average normal strain. In each case show the deformed element due to these strains. | |
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