Numerical implementation of a yield vertex non-coaxial model

Yun Ming Yang, Hua You Chai, Chang Fu Wei

Research output: Journal PublicationArticlepeer-review

3 Citations (Scopus)


This paper ascertains the reasons for the numerical non-convergence problem when the yield vertex non-coaxial model is implemented in the finite element analysis to predict the behaviour of a complicated geotechnical engineering problem, shallow foundation behaviour. It is found that a large non-coaxial influence at the start of elastoplastic loading, which causes the predominance of non-coaxial plastic strain rate over the coaxial plastic strain rate in stress-strain responses, is the reason for the numerical problem. The original yield vertex non-coaxial model is modified to overcome the numerical problem. It is shown that the modified non-coaxial model retains the functions of the original non-coaxial model. Meanwhile, it overcomes the non-convergence problem when a larger non-coaxial influence is considered.

Original languageEnglish
Pages (from-to)373-377
Number of pages5
JournalYantu Lixue/Rock and Soil Mechanics
Issue numberSUPPL. 2
Publication statusPublished - Nov 2010
Externally publishedYes


  • Constitutive model
  • Finite element method
  • Non-coaxial
  • Numerical integration

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology
  • Soil Science


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