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1

Technically WikiPedia is correct but we usually use apparent stress during stress strain curve (Mostly) and not actual stress . Apparent stress(or engineering stress) is the one you mentioned and the one mentioned by Wikipedia is actual strees(or true stress) As you can see in this picture A is engineering stress strain curve whereas b is true stress ...


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I read that for fixed stress (i.e. fixed elongation), I should observe decreasing strain over time. This is a misprint. Fixed elongation is a fixed strain i.e. in this experiment you apply an initial strain and measure the decreasing stress as a function of time. The phrase visco-elastic is a rather general term that covers a multitude of sins. However in ...



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