Consider a sheet nominally 0.8 mm thick with a 1% variation of thickness. (Some places are 0.808
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Consider a sheet nominally 0.8 mm thick with a ±1% variation of thickness. (Some places are 0.808 mm and others are 0.792 mm thick.) How high would n have to be to ensure that in a tensile specimen every point was strained to at least & = 0.20 before the thinner section necked?
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