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A two dimensional VCFEM formulated with plastic, creep and thermal strain for simulate fatigue of porous material

机译：用塑料，蠕变和热应变配制的二维VCFEM，用于模拟多孔材料疲劳

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摘要

In this paper, a two-dimensional Voronoi cell finite element model is developed for analyzing homogeneous materials containing dispersed voids in the matrix. The complementary energy functional, formulated with plastic, creep and thermal strain, is applied for the numerical simulation of fatigue behavior of porous materials under different conditions. The paper starts with a description of 2D porous material. To complete the computation of nonlinear strain, the constitutive relation of material in the complementary energy functional is changed. In order to verify the validity and accuracy of the model, the result of simulations is compared with the counterpart of the normal displacement finite element program ABAQUS. The comparison results suggest that the VCFEM, with the same accuracy, have the advantages of simple meshing, faster computation. In the numerical simulation, the model is applied for simulating low-cycle fatigue, variable temperature low cycle fatigue and thermo-mechanical fatigue, at the same time, the influence of porosity is also discussed.
机译：在本文中，开发了一种二维Voronoi细胞有限元模型，用于分析基质中含有分散空隙的均质材料。用塑料，蠕变和热应变配制的互补能量函数用于不同条件下多孔材料疲劳行为的数值模拟。纸张从2D多孔材料的描述开始。为了完成非线性应变的计算，改变了互补能量函数中材料的本构关关系。为了验证模型的有效性和准确性，将模拟结果与正常位移有限元件ABAQUS的对应结果进行了比较。比较结果表明，具有相同精度的VCFEM具有简单的啮合，更快的计算优势。在数值模拟中，该模型用于模拟低周期疲劳，可变温度低周疲劳和热机械疲劳，同时还讨论了孔隙率的影响。

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  • 来源
    《Composite Structures》 |2020年第11期|112598.1-112598.17|共17页
  • 作者

    Hao WenYu; Guo Ran; Han Ning;

  • 作者单位

    Kunming Univ Sci & Technol Dept Engn Mech Kunming 650000 Yunnan Peoples R China;

    Kunming Univ Sci & Technol Dept Engn Mech Kunming 650000 Yunnan Peoples R China;

    Kunming Univ Sci & Technol Dept Engn Mech Kunming 650000 Yunnan Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Porous material; Voronoi cell FEM; Plastic; Creep; Thermal strain; Figure;

    机译：多孔材料;voronoi细胞FEM;塑料;蠕变;热应变;图;

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