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RESEARCH PAPERS

Dynamic Damage Evolution of Solids in Compression: Microcracking, Plastic Flow, and Brittle-Ductile Transition

[+] Author and Article Information
H. Deng, S. Nemat-Nasser

Center of Excellence for Advanced Materials, Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla, CA 92093-0411

J. Eng. Mater. Technol 116(3), 286-289 (Jul 01, 1994) (4 pages) doi:10.1115/1.2904289 History: Received August 20, 1993; Revised March 20, 1994; Online April 29, 2008

Abstract

Dynamic compressive damage evolution in solids, associated with brittle microcracking and ductile plastic flow, is modeled through plastic flow and tensile microcracking, which are induced by the deformation of preexisting microflaws at grain boundaries, slip bands, and microcavities. The micromechanical aspect of this model is discussed in terms of the dominance of microcracking or plastic flow, and possible transition from microcracking to plastic flow is investigated. The effect of lateral confinement on the dynamic damage evolution is investigated, emphasizing the brittle-ductile transition.

Copyright © 1994 by The American Society of Mechanical Engineers
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