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
Grahic Jump Location
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
Grahic Jump Location
Comparison of yield surfaces (f=0.1) with matrix yield surfaces for different C/T
Grahic Jump Location
Comparison of exact solutions with the upper bound and modified upper bound yield surface (C/T=1.1) for purely hydrostatic loading
Grahic Jump Location
Comparison of porous yield surfaces with modified von Mises and von Mises matrices
Grahic Jump Location
Yield surfaces of cylindrical voids for axisymmetric and plane-strain cases, (a) C/T=1.1, (b) f=0.1
Grahic Jump Location
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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