A non-linear cohesive zone model for low-cycle fatigue of quasi-brittle materials
نویسندگان
چکیده
The low-cycle fatigue behaviour of quasi-brittle materials (e.g., concrete and rock) that is characterized by induced inelastic deformation significantly affects the integrity serviceability engineering structures. However, mechanism fatigue-controlled fracture process not clear. This paper develops a new cyclic cohesive zone model (CZM) for materials. Based on in-situ stress damage state, nonlinear proposed implemented into CZM. parameters are determined based S–N curve. A worked example monotonic loading beam under three-point bending presented to demonstrate application developed numerical model. After validation against experimental data, crack mechanisms discussed comprehensive parametric study carried out investigate effects parameters, levels sequences failure. It has been found there three stages development mouth displacement, i.e., initiation, stable growth rapid which caused combined static damage, dominated respectively. CZM practically significant its easy be provides useful tool modelling
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ژورنال
عنوان ژورنال: Theoretical and Applied Fracture Mechanics
سال: 2022
ISSN: ['0167-8442', '1872-7638']
DOI: https://doi.org/10.1016/j.tafmec.2022.103641