Back stress evolution during creep of a metal matrix composite: an analysis by the mean-field approach and its implications
作者： Kenji Wakashima
DOI: 10.1016/S0921-5093(00)00694-8
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摘要: Abstract Unsteady creep behavior of a metal matrix composite has been studied by analyzing the evolution ‘back stress’ (volume-averaged internal stress) during concurrent processes and diffusive mass transport along matrix-reinforcement interfaces. The is assumed to obey power law with stress exponent 3. Analytical expressions are obtained not only for variation in rate time on loading but also time-dependent strain be recovered when applied load completely removed. Some numerical results presented illustrate features analysis. A modification made incorporating threshold creep, whereby possible reasoning suggested ‘anomalously high’ apparent exponents experimental data composites.
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