Spall Study in Mild Steel

[+] Author and Article Information
Ze-Ping Wang

Institute of Applied Mechanics, Southwest Jiaotong University, Chengdu, Sichuan 610031, People’s Republic of China

J. Eng. Mater. Technol 119(4), 374-379 (Oct 01, 1997) (6 pages) doi:10.1115/1.2812272 History: Received December 17, 1993; Revised July 21, 1996; Online November 27, 2007


The influence of inertial, thermal, and rate-sensitive effects on the void growth at high strain rate in a thermal-viscoplastic solid is investigated by means of a theoretical model proposed in the present paper. Numerical analysis of the model suggests that inertial, thermal, and rate-sensitive effects are three major factors which greatly influence the behavior of the void growth in porous ductile materials in high strain rate case. One and two-dimensional plate-impact tests of mild steel are performed. Microscopic observations of the softly recovered specimens reveal the mechanism of micro-damage. As an application of the theoretical model, the processes of one and two dimensional spallation in mild steel are successfully simulated by a finite-difference Lagrangian dynamic code in which the mathematical model presented in this paper is incorporated.

Copyright © 1997 by The American Society of Mechanical Engineers
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