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论文类型：期刊论文

发表时间：2017-07-27

发表刊物：MECHANICS OF ADVANCED MATERIALS AND STRUCTURES

收录刊物：SCIE、EI、Scopus

卷号：24

期号：10

页面范围：797-808

ISSN号：1537-6494

关键字：Cosserat continua; size effect; mesh-independent; strain softening; non-associated plasticity; progressive failure

摘要：The finite element models of Cosserat continuum in two- and three-dimensions are presented. The size effects of a cantilever beam and a micro-rod, the well-posedness, the mesh-independent solutions of the boundary value problems with non-associated elastoplastic and strain softening constitutive behavior, and the progressive failure of the two- and three-dimensional vertical excavations are studied. Numerical results illustrate that the proposed Cosserat continuum models are capable of reflecting the size effects of micro-structures, preserving the well-posedness of the boundary value problem characterized by the strain localization, ensuring mesh-independent solutions, and simulating the entire progressive failure process occurring in engineering structures.