Micromechanical finite element calculations of temperature and void configuration effects on void growth and coalescence
Micromechanical finite element calculations of temperature and void configuration effects on void growth and coalescence
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DOI：
10.1016/s0749-6419(99)00076-5
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发表时间：
2000-06
影响因子：
9.8
通讯作者：
M. Horstemeyer;M. M. Matalanis-M.;A. M. Sieber;M. Botoș
中科院分区：
文献类型：
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作者：
M. Horstemeyer;M. M. Matalanis-M.;A. M. Sieber;M. Botoș
我们提出了微观力学有限元结果，量化聚结的影响，根据温度和不同的空间排列的空隙。我们提出了一个临界的空隙韧带距离（ILD）来定义来自微力学模拟，其中空隙体积分数演变为应变的函数的空隙聚结。使用Bammann-Chiesa-约翰逊的温度和应变速率内变量塑性模型改变几个参数，以确定聚结效果。这些参数包括两种不同加工硬化率的材料（304 L不锈钢和6061 T6铝），三种不同温度（298、400和600 K），几种边界条件（力和位移：单轴、平面应变和双轴），所用单元类型（平面应变和轴对称）、不同ILD和空隙数量（一个和两个空隙配置）。本研究提供了一个基础的宏观模拟聚并简要讨论。
We present micromechanical finite element results that quantify coalescence effects based upon temperature and different spatial arrangements of voids. We propose a critical intervoid ligament distance (ILD) to define void coalescence that is derived from micromechanical simulations in which void volume fraction evolves as a function of strain. Several parameters were varied using the temperature and strain rate internal variable plasticity model of Bammann–Chiesa–Johnson to determine the coalescence effects. The parameters include two types of materials with different work hardening rates (304L stainless steel and 6061T6 aluminum), three different temperatures (298, 400, and 600 K), several boundary conditions (force and displacement: uniaxial, plane strain, and biaxial), type of element used (plane strain and axisymmetric), different ILDs, and the number of voids (one and two void configurations). The present study provides a basis for macroscale modeling of coalescence which is briefly discussed.