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Question: a work material has a strength constant 300mpa and...

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A work material has a strength constant = 300MPa and a strain hardening exponent = 0.25. It is open forged to half its height. The original shape is cylindrical having a height of 50 cm and a diameter of 40 cm. We assume that there is no volume change during the direct forging process. Given a coefficient of friction of 0.25, please calculate the forging force when the true strain = 0.2.

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