A coupled smeared crack-plasticity model in incremental sequentially linear analysis for mixed failure modes

In this paper, a coupled smeared crack-plasticity model is proposed in incremental sequentially linear analysis (ISLA) to simulate mixed failure modes of tension, shear and compression. ISLA provides a robust and extensible solution for quasi-brittle materials. The solution search path follows damage cycles sequentially with secant stiffness corresponding to local damage increments, which traces both damage history (explicit) and displacement history (implicit). The proposed rotating smeared crack model resolves the limitations of a purely rotating crack model in the case that the smallest and the largest prin-cipal stress value are almost the same or the situation that the principal directions interchange between the beginning and the end of a load step. ISLA with the proposed constitutive model were demonstrated by mixed flure modes of the in-plane tests with large overburdens of a double clamped short wall and a cantilever long wall. Stable post-peak results were computed for large displacements, and localized crack propagation was computed robustly and correctly. (c) 2022 Elsevier Ltd. All rights reserved.

Automated summary

This paper proposes a coupled smeared crack-plasticity model for simulating mixed failure modes. The model tracks the damage and displacement history through incremental sequentially linear analysis (ISLA) and resolves the limitations of a purely rotating crack model. The effectiveness of this model is demonstrated through in-plane tests.