›› 2010, Vol. 31 ›› Issue (3): 976-980.

• Numerical Analysis • Previous Articles     Next Articles

Secondary development of modified Cambridge model in ANSYS software

GUAN Yun-fei1，GAO Feng2，ZHAO Wei-bing1，YU Jin3   

  1. 1. Institute of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China; 2. School of Sciences, China University of Mining and Technology, Xuzhou 221008, China; 3. College of Civil Engineering, Huaqiao University, Xiamen 361021, China
  • Received:2008-09-22 Online:2010-03-10 Published:2010-03-31

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Abstract:

The software ANSYS is one of the most powerful nonlinear finite element analysis programs in the world. It includes different kinds of material models. However, the ANSYS currently lacks modified Cambridge constitutive model which has been widely used to simulate the stress-strain behavior of soil in geotechnical engineering. The secondary development tools UPFs and data interface have been used to add the modified Cambridge model to standard ANSYS procedure. The key technology of secondary development is the compilation of subroutine UMAT. F. The subroutine must in accord with the constitutive equation of the modified Cambridge model and the rule of finite element computation. Its variable names and input-output formats must be consistent with standard ANSYS procedure. A numerical example is given; and the result verifies that the secondary development of the modified Cambridge model is valid. The method mentioned can be extended to add other material constitutive models to standard ANSYS procedure.

Key words: finite elements, modified Cambridge model, ANSYS, secondary development

CLC Number: 

  • O 245
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