In many situations it is known that the normal stress in a given direction is zero. For example, ϭz = 0 in the case of the thin plate shown. For this case, which is known as plane stress, show that If the strains ∈x and ∈y have been determined experimentally, we can express ϭx, ϭy and ∈z as follows:
Fig. P2.73
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MECHANICS OF MATERIALS
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