Abstract
Prevalent mean-field homogenization techniques excel in approximating effective stiffness, they fall short in predicting the stress states of individual inclusions within the same phase. Differential Mori-Tanaka (DMT) method presents possibilities for estimating stresses/strains in individual inclusions, which can be used for improved micromechanics of short fibre composites. This paper showcases inherent physical admissibility problems associated with DMT and proposes a novel modification to address them. The two schemes viz. DMT and modified-DMT are benchmarked using full-FE results. The modified-DMT effectively circumvents the physical admissibility problems with the DMT and is shown to results in qualitatively superior predictions of stresses in individual inclusions.
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