Yield Functions and Flow Rules for Porous Pressure-Dependent Strain-Hardening Polymeric Materials

[+] Author and Article Information
J. H. Lee, J. Oung

Department of Mechanical Engineering, University of Alaska, Fairbanks, AK 99775-5905

J. Appl. Mech 67(2), 288-297 (Jun 22, 1999) (10 pages) doi:10.1115/1.1305278 History: Received December 15, 1998; Revised June 22, 1999
Copyright © 2000 by ASME
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Grahic Jump Location
Yield surfaces of spherical voids C/T=1.1
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Comparison of yield surfaces (f=0.1) with matrix yield surfaces for different C/T
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Comparison of exact solutions with the upper bound and modified upper bound yield surface (C/T=1.1) for purely hydrostatic loading
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Comparison of porous yield surfaces with modified von Mises and von Mises matrices
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Yield surfaces of cylindrical voids for axisymmetric and plane-strain cases, (a) C/T=1.1, (b) f=0.1
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Comparison of approximate solution with the upper bound and modified upper bound yield surface (C/T=1.1) for transverse “hydrostatic” loading
Grahic Jump Location
Effect of pressure dependence on yield surfaces for cylindrical voids, (a) plane strain, (b) axisymmetric case
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Uniaxial stretching of polycarbonate, (a) stress-strain curves of the matrix C and T, (b) stress-strain curve of the porous material, (c) evolution of void fraction f




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