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Volume 34 Issue 6
Nov 2020
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Chinese Journal of High Pressure Physics  > 2020  >  34(6): 064202.
LIU Haowei, SU Buyun, QIU Ji, LI Zhiqiang. Numerical Simulation of Multiaxial Creep Behavior of 2D Anisotropic Cellular Materials[J]. Chinese Journal of High Pressure Physics, 2020, 34(6): 064202. doi: 10.11858/gywlxb.20200561
Citation: LIU Haowei, SU Buyun, QIU Ji, LI Zhiqiang. Numerical Simulation of Multiaxial Creep Behavior of 2D Anisotropic Cellular Materials[J]. Chinese Journal of High Pressure Physics, 2020, 34(6): 064202. doi: 10.11858/gywlxb.20200561
shu

Numerical Simulation of Multiaxial Creep Behavior of 2D Anisotropic Cellular Materials

doi: 10.11858/gywlxb.20200561
  • 1.

    Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

  • 2.

    Shanxi Key Laboratory of Material Strength & Structural Impact, Taiyuan 030024, Shanxi, China

  • 3.

    National Demonstration Center for Experimental Mechanics Education (Taiyuan University of Technology), Taiyuan 030024, Shanxi, China

  • Received Date: 25 May 2020
  • Rev Recd Date: 10 Jun 2020
    Abstract
  • Based on the Voronoi model of 2D anisotropic cellular materials, the uniaxial and multiaxial creep behaviors were systematically studied. A large number of numerical simulation results showed that the mechanical properties of the 2D anisotropic cellular materials are greatly dependent on the geometric tensile coefficient R, which represents the degree of anisotropy. Among them, the values of the parameters r1 and $\nu_{12} $ gradually increase with the increase of R, and the change rule of the parameter r2 is just the opposite. For 2D anisotropic cellular materials, with the increase of R, the uniaxial steady-state creep rate along the tensile direction increases, while the performance in the other direction decreases gradually. In addition, based on the relationship between characteristic stress and characteristic strain, a theoretical model was established, which can describe the multiaxial creep behavior of 2D anisotropic cellular materials. By comparing the prediction results of the model with the numerical simulation results of the steady-state creep rate of materials under different anisotropic degrees and loading conditions, it was found that these two agree well, which proves the validity of the theoretical model established in this paper.

     

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