点击次数：

论文类型：期刊论文

发表时间：2018-09-01

发表刊物：COMPUTERS AND GEOTECHNICS

收录刊物：SCIE

卷号：101

页面范围：159-167

ISSN号：0266-352X

关键字：Axisymmetric; Elastoplastic; Consistent algorithm; Finite element; Cosserat continua

摘要：The theory and finite-element formula of the axisymmetric Cosserat continuum are presented by introducing an independent rotational degree of freedom into the axisymmetric continuum. A pressure-dependent elastic-plastic model and the corresponding consistent algorithm for the constitution integration of the model are presented in the framework of the axisymmetric Cosserat continuum theory. The numerical examples illustrate that the developed model can maintain the well-posedness of the boundary value problems; overcome the problems of mesh-dependency, which commonly occur in the classical continuum when the strain softening behaviour is incorporated; and capture the entire progressive failure process.