Review and Evaluation of Fatigue Damage Evolution Models for Composite Laminates

Fatigue damage evolution model is of great importance for predicting property degradation and fatigue life of materials.In this paper, a comprehensive review of fatigue damage evolution models for composite laminates is presented, and according to the three-stage (Ⅰ, Ⅱ, and Ⅲ) characteristics of the fatigue damage evolutions, the wear-out models are divided into two categories, i.e., Ⅰ-Ⅱ-Ⅲ three-stage models and Ⅰ-Ⅱ two-stage models. In order to validate and evaluate the selected models with relatively strong characterization ability, five basic criteria for model evaluation are suggested, and eight groups of experimental data on fatigue damage evolution under different loading conditions are adopted. The investigation show that most of the fatigue damage evolution models developed so far are recognized as macroscopic and phenomenological ones, which consider few influencing factors and rely heavily on experiments. For stages I and II, the two-stage wear-out models show high fitting accuracy. But in comparison, the three-stage wear-out models are more applicable than the two-stage ones, for their accurate simulation of the whole damage evolution process. While among those three-stage models, the Mao, Wu Fuqiang and Shiri models are more extensively cited and applied. To overcome the drawbacks of the phenomenological models, it is necessary to consider the microscopic damage modes and mechanisms under different influencing factors, and to develop physical-based fatigue damage evolution model and theory. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.