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A Review of Damage, Void Evolution, and Fatigue Life Prediction Models
Summary
This review examines empirical and physics-based models for damage evolution, void growth, and fatigue life prediction in engineering materials, covering frameworks including the Gurson-Tvergaard-Needleman model, Johnson-Cook damage model, microplasticity models, and unified mechanics theory using irreversible entropy.
Degradation, damage evolution, and fatigue models in the literature for various engineering materials, mostly metals and composites, are reviewed. For empirical models established under the framework of Newtonian mechanics, Gurson–Tvergaard–Needleman (GTN) type model, Johnson-Cook (J-C) type damage model, microplasticity model, some other micro-mechanism based damage models, and models using irreversible entropy as a metric with an empirical evolution function are thoroughly discussed. For Physics-based models, the development and applications of unified mechanics theory is reviewed.
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