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- Title
Damage Evolution Model Considering Fatigue Failure Factor Under Multiaxial Non-Proportional Loading.
- Authors
Ren, Z.; Qin, X.; Zhang, Q.; Sun, Y.
- Abstract
The Chaudonneret model cannot fully and effectively characterize the linear correlation between the strain energy density release rate and the number of cycles in the damage evolution stage of low carbon alloy steels under multiaxial non-proportional loading. In order to solve this problem, the fatigue failure process of Q355B is captured by digital image correlation technology, and the factors affecting fatigue failure under multiaxial loading are analyzed in combination with fracture morphology characteristics. Based on the concept of critical plane, a new stress combination form is introduced to reflect the failure factors, and the corresponding damage evolution model is proposed. The model considers the interaction between different stresses and can describe the damage evolution law under non-proportional loading. Compared with different types of life prediction models, the distribution range of life prediction results of the improved model under multiaxial non-proportional loading has a good correlation with the experimental values.
- Subjects
DIGITAL image correlation; MILD steel; LOW alloy steel; STRAIN energy; PROBLEM solving; DIGITAL images
- Publication
Experimental Techniques, 2024, Vol 48, Issue 5, p905
- ISSN
0732-8818
- Publication type
Article
- DOI
10.1007/s40799-024-00706-z