WANG Xi-gang, FU Ming-fu. Fuzzy Elasto-Visco-Plasticity Analysis of Finite Deformation Based on the L-D Plastic Flow Rule[J]. Applied Mathematics and Mechanics, 2015, 36(2): 128-139. doi: 10.3879/j.issn.1000-0887.2015.02.002
Citation: WANG Xi-gang, FU Ming-fu. Fuzzy Elasto-Visco-Plasticity Analysis of Finite Deformation Based on the L-D Plastic Flow Rule[J]. Applied Mathematics and Mechanics, 2015, 36(2): 128-139. doi: 10.3879/j.issn.1000-0887.2015.02.002

Fuzzy Elasto-Visco-Plasticity Analysis of Finite Deformation Based on the L-D Plastic Flow Rule

doi: 10.3879/j.issn.1000-0887.2015.02.002
Funds:  The National Natural Science Foundation of China(11362016)
  • Received Date: 2014-04-02
  • Rev Recd Date: 2014-11-22
  • Publish Date: 2015-02-15
  • To dynamically analyze the finite deformation of rock and soil materials, the Green strain and the 2nd Kirchoff stress were used to describe their geometric nonlinearity. Through introduction of a membership function into the yield function, a fuzzy elasto-visco-plastic constitutive model based on the L-D plastic flow rule was built. According to the principle of nonlinear finite element, the numerical finite-deformation results corresponding to the dynamic triaxial soil tests were obtained, and compared with those traditional small-deformation results. The comparison shows that the finite-deformation results were closer to the dynamic triaxial tested results. Moreover, the fuzzy elasto-visco-plastic model well reflects the soil and rock dynamic properties under cyclic loading, and thus makes an effective way for soil and rock dynamic analysis, given its relatively simpler mathematical formulation and more convenience for finite element programming.
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