点击次数：

论文类型：期刊论文

发表时间：2017-01-01

发表刊物：ENGINEERING COMPUTATIONS

收录刊物：SCIE、EI、Scopus

卷号：34

期号：2

页面范围：251-271

ISSN号：0264-4401

关键字：Strain-softening; Low-order finite element; Mixed finite element analysis; Non-associated plasticity; Progressive failure

摘要：Purpose -This paper aims to develop a finite element analysis strategy, which is suitable for the analysis of progressive failure that occurs in pressure-dependent materials in practical engineering problems.
   Design/methodology/approach -The numerical difficulties stemming from the strain-softening behaviour of the frictional material, which is represented by a non-associated Drucker-Prager material model, is tackled using the Cosserat continuum theory, while the mixed finite element formulation based on Hu-Washizu variational principle is adopted to allow the utilization of low-order finite elements.
   Findings -The effectiveness and robustness of the low-order finite element are verified, and the simulation for a real-world landslide which occurred at the upstream side of Carsington embankment in Derbyshire reconfirms the advantages of the developed elastoplastic Cosserat continuum scheme in capturing the entire progressive failure process when the strain-softening and the non-associated plastic law are involved.
   Originality/value -The permit of using low-order finite elements is of great importance to enhance computational efficiency for analysing large-scale engineering problems. The case study reconfirms the advantages of the developed elastoplastic Cosserat continuum scheme in capturing the entire progressive failure process when the strain-softening and the non-associated plastic law are involved.