Abstract: The stability of frictional materials that display a nonassociated flow rule is discussed. Particular emphasis is put on an analysis of recent experiments conducted by Lade et al. (1987), where stable behavior was observed, ...

Abstract: Explicit and implicit integration of elastoplastic constitutive relations subjected to the constraint of undrained behavior is investigated. The effect on numerical efficiency of various modes in terms of total stress and ...

Abstract: A new and relatively simple constitutive theory that describes fracture and slip of an interface in cementitious composites such as concrete is presented. The constitutive model is developed and formulated in analogy to ...

Abstract: This paper focuses on the numerical treatment of an interface model that was presented in the companion paper. A generalized trapezoidal rule is proposed for integrating the slip rule. The new model is used in finite element ...