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RESEARCH PAPERS

Propagation of Continuum Damage in a Viscoelastic Ice Bar

[+] Author and Article Information
J. G. Shin

Department of Naval Architecture and Ocean Engineering, Seoul National University, Seoul, 151-742, Korea

D. G. Karr

Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI

J. Offshore Mech. Arct. Eng 116(2), 109-113 (May 01, 1994) (5 pages) doi:10.1115/1.2920130 History: Received December 18, 1991; Revised October 19, 1993; Online June 12, 2008

Abstract

An initial value problem of a semi-infinite nonlinear viscoelastic bar is solved with continuum damage evolution. The evolution law of the continuum damage for a viscoelastic material is used in order to explore the propagation of two crushing mechanisms: grain boundary cracking and transgranular cracking. Using the method of characteristics, the speed of propagation is found to be dependent on the continuum damage. On the wave front, the delayed elastic strain is zero, and only the continuum damage due to the transgranular cracking evolves. A finite difference method is developed to solve the governing equations on the obtained characteristic lines, and gives a stable solution of the propagation of the stress, strain, and damage. Numerical results are obtained and discussed using the material properties of polycrystalline ice.

Copyright © 1994 by The American Society of Mechanical Engineers
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