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What do you understand by the term proof stress ? What is the value of strain for 0.2% proof stress

saurabhjain

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What do you understand by the term proof stress ? What is the value of strain for 0.2% proof stress

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Concept of proof stress is followed for materials which do not have well defined yield point.Proof stress in such cases is the stress at which the non-proportional elongation amounts to a specified % of the original gauge length.

The value of strain for 0.2% proof stress is 0.002.

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