基于ABAQUS土的直剪实验三维数值模拟研究

Three-dimensional Numerical Simulation of Direct Shear Test of Soil Based on ABAQUS

土的直接剪切实验,在土力学实验中有重要地位。实验所测得的内聚力c和内摩擦角φ两个材料参数可以直接应用到工程实践中。其原理清晰、操作简便、使用范围广,而且,研究结果表明~[1],由直剪实验得到的结果与从其它更加复杂的实验中得到的结果基本一致。此外,采用有限元分析软件ABAQUS对土的直接剪切过程进行三维数值模拟,对土样在剪切过程的应力-应变关系进行了分析,仿真结果与实验结果较为吻合,能够较为准确的反映土的直接剪切实验的力学过程,从侧面也能够验证实验结果所得参数的准确性。

The direct shear test of soil has an important role in soil mechanics experiments. The cohesive c and internal friction angleφ measured in the experiment can be directly applied to engineering practice. The principle is clear, the operation is simple, and the scope of use is wide. Moreover, the research results show that~[1], the results obtained by the direct shear experiment are basically consistent with the results obtained from other more complex experiments. In addition, the finite element analysis software ABAQUS isused to perform three-dimensional numerical simulation on the direct shear process of soil. The stress-strain relationship of the soil sample in the shear processisanalyzed. The simulation results are in good agreement with the experimental results and can accurately reflect the mechanical process of direct shear experimentsofsoil andthe accuracy of the parameters obtained from the experimental results from the side alsocan beverified.