The similarities between the response of a viscoplastic material and the response of metals during forging are noted. The yield condition and flow law for an incompressible viscoplastic material are used as a basis for an approximate solution of the problem of the compression of a circular disk. The rate effects associated with the presence of time-dependent flow are observed to evolve as an integral part of the solution.
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Compression of a Viscoplastic Disk
R. L. Carlson
Research Center, U. S. Steel Corporation, Monroeville, Pa.
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Carlson, R. L. (December 1, 1964). "Compression of a Viscoplastic Disk." ASME. J. Basic Eng. December 1964; 86(4): 700–702. https://doi.org/10.1115/1.3655926
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