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Inertial Effects on Void Growth in Viscoplastic Materials

Tong, W. and Ravichandran, G. (1995) Inertial Effects on Void Growth in Viscoplastic Materials. Journal of Applied Mechanics, 62 (3). pp. 633-639. ISSN 0021-8936. doi:10.1115/1.2895993.

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The present work examines the inertial effects on void growth in viscoplastic materials which have been largely neglected in analyses of dynamic crack growth and spallation phenomena using existing continuum porous material models. The dynamic void growth in porous materials is investigated by analyzing the finite deformation of an elastic/viscoplastic spherical shell under intense hydrostatic tensile loading. Under typical dynamic loading conditions, inertia is found to have a strong stabilizing effect on void growth process and consequently to delay coalescence even when the high rate-sensitivity of materials at very high strain rates is taken into account. Effects of strain hardening and thermal softening are found to be relatively small. Approximate relations are suggested to incorporate inertial effects and rate sensitivity of matrix materials into the porous viscoplastic material constitutive models for dynamic ductile fracture analyses for certain loading conditions.

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Ravichandran, G.0000-0002-2912-0001
Additional Information:© 1995 by The American Society of Mechanical Engineers. Contributed by the Applied Mechanics Division of The American Society of Mechanical Engineers for publication in the ASME Journal of Applied Mechanics. The authors would like to acknowledge the support of this research by the Division of Materials Research of the National Science Foundation through grant No. DMR-9396132. G.R. acknowledges the support of an NSF Presidential Young Investigator award, grant No. MSS-9157846. The computations were performed on a Cray Y-MP at the Jet Propulsion Laboratory (JPL) Supercomputer Center which was made possible through a grant provided by Cray Research, Inc., to the California Institute of Technology.
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Issue or Number:3
Record Number:CaltechAUTHORS:20150226-095801116
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Official Citation:Tong W., Ravichandran G. Inertial Effects on Void Growth in Porous Viscoplastic Materials J. Appl. Mech. 62(3), 633-639 (1995) (7 pages); doi:10.1115/1.2895993
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55247
Deposited By: Cheryl Gause
Deposited On:03 Mar 2015 00:13
Last Modified:10 Nov 2021 20:43

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