Mesomechanical analysis of the ELASTO-PLASTIC behavior of a 3D composite-structure under tension
Mesomechanical analysis of the ELASTO-PLASTIC behavior of a 3D composite-structure under tension
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拉伸下 3D 复合结构弹塑性行为的细观力学分析
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
R. Balokhonov
中科院分区：
文献类型：
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作者：
V. Romanova;E. Soppa;Siegfried Schmauder;R. Balokhonov
本文采用细观力学方法模拟三维结构的力学行为，研究金属基复合材料在拉伸作用下的弹塑性响应。本文采用有限体积分步堆积法（SSP）设计了Al（6061）基体和Al_2O_3夹杂的复合材料结构。用隐式有限元法和显式有限差分法数值求解了受拉结构的三维力学问题。特别注意准静态和动态计算的比较。研究了拉伸过程中基体塑性变形的演变规律。在细观力学概念的基础上，对应力和应变张量的不同分量进行了定性和定量分析。在三维分析的基础上，得出了一些关于二维近似在考虑细观和宏观尺度变形行为时的适用性的结论。
In this contribution, a mesomechanical approach to simulate the mechanical behavior with explicit consideration of the three-dimensional structure is applied to study the elasto-plastic response of a metal matrix composite material under tension. A procedure of a step-by-step packing (SSP) of a finite volume with structural elements has been used to design the composite structure consisting of an Al(6061)-matrix with Al2O3-inclusions. A three-dimensional mechanical problem of the structure behavior under tension has been solved numerically, using both an implicit finite-element method and an explicit finite-difference code. Special attention is given to the comparison of quasistatic and dynamic calculations. Evolution of plastic deformation in the matrix during tensile loading has been investigated. Qualitative and quantitative analysis of different components of stress and strain tensors is provided on the basis of mesomechanical concepts. Basing on the 3D-analysis, some conclusions regarding an applicability of a 2D approximation when considering deformation behavior on meso and macro scale levels have been done.