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1A LOWER BOUND LIMIT ANALYSIS OF DUCTILE COMPOSITE MATERIALS显示文摘The plastic load-bearing capacity of ductile composites such as metal matrix com-posites is studied with an insight into the microstructures. The macroscopic strength of a com-posite is obtained by combining the homogenization theory with static limit analysis, where thetemperature parameter method is used to construct the self-equilibrium stress field. An interfacefailure model is proposed to account for the effects of the interface on the failure of composites.The static limit analysis with the finite-element method is then formulated as a constrained non-linear programming problem, which is solved by the Sequential Quadratic Programming (SQP)method. Finally, the macroscopic transverse strength of perforated materials, the macroscopictransverse and off-axis strength of fiber-reinforced composites are obtained through numericalcalculation. The computational results are in good agreement with the experimental data.Zhang Hongtao Liu Yinghua Xu Bingye 2005Acta Mechanica Solida Sinica2005,18,3:2
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