Question: Problems for Chapter 5 5 . 1 An HDPE tensile bar yields at a nominal stress of 2 8 MPa at 8 % extension, beyond
Problems for Chapter
An HDPE tensile bar yields at a nominal stress of MPa at extension, beyond which the stress falls to MPa as a neck forms. The neck stabilizes with a crosssectional area equal to of the original area. Sketch a graph of true stress against percentage elongation.
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