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首页> 外文期刊>Journal of teoretical and applied mechanics >AN ANALYTICAL STUDY ON THE ELASTIC-PLASTIC BEHAVIOR OF METAL MATRIX COMPOSITES UNDER TENSILE LOADING
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AN ANALYTICAL STUDY ON THE ELASTIC-PLASTIC BEHAVIOR OF METAL MATRIX COMPOSITES UNDER TENSILE LOADING

机译：拉伸载荷作用下金属基复合材料弹塑性行为的分析研究

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摘要

An analytical approach is proposed for studying the elastic-plastic behavior of short fiber reinforced metal matrix composites under tensile loading. In the proposed research, a micro-mechanical approach is employed considering an axi-symmetric unit cell including one fiber and the surrounding matrix. First, the governing equations and the boundary conditions are derived and the elastic solution is obtained based on some shear lag type methods. Since under normal loading conditions and according to the fiber material characteristics the metal matrix undergoes plastic deformation, while the fiber remains within the elastic region, a plastic deformation is obtained for the matrix under each small tensile loading step. Then, the elastic-plastic stress transfer behavior of the composite is studied considering this plastic deformation. The results are finally compared with the numerical results obtained from the FE analysis of the considered micromechanical model.
机译：提出了一种分析方法研究短纤维增强金属基复合材料在拉伸载荷下的弹塑性行为。在提出的研究中，考虑到包括一根纤维和周围基质的轴对称晶胞，采用了一种微机械方法。首先，推导了控制方程和边界条件，并基于一些剪力滞后方法获得了弹性解。由于在正常加载条件下并根据纤维材料特性，金属基体会发生塑性变形，而纤维保留在弹性区域内，因此在每个小的拉伸加载步骤中，基体都会获得塑性变形。然后，考虑了这种塑性变形，研究了复合材料的弹塑性应力传递行为。最后将结果与从所考虑的微机械模型的有限元分析获得的数值结果进行比较。

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