Smeared Crack and X-FEM Models in the Context of Poromechanics

摘要: The process of cracking in quasi-brittle materials such as concrete is characterized by the formation and coalescence micro-cracks which eventually form a propagating macro-crack. This connected with gradual loss load carrying capacity, generally denoted material softening. As most popular mode to represent within numerical methods, finite element method, representation continuum damage mechanics framework (see reviews contained e.g. Hofstetter Mang (1995); de Borst et al. (1998); (2002); (2003)). Within this class models, dissipation associated softening either formulated local (fracture-energy based) or non-local setting.