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Numerical simulation of fatigue crack growth with stress-strain relationship under cyclic loading
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| 概要 | In numerical simulations of fatigue crack propagation, the true stress-true strain relationship under cyclic loading should be considered, but in simulations modelling crack opening behaviour, the str...ess-strain relationship of the material is regarded as rigid plastic or isotropically hardened elastic-plastic material from the point of view of model simplification. In this study, the true stress-true strain relationship under cyclic loading, estimated from the true stress-true strain relationship under monotonic tensile loading, is implemented in fatigue crack propagation simulations of work-hardened materials proposed by some of authors. Fatigue crack growth curves under the following three loadings, (1) constant cyclic loading under different stress ratios, (2) two-stage block loading cycles, (3) constant cyclic loading with a spike load, were estimated and compared with the measured results obtained in previous studies. The results show that the accuracy of the fatigue crack growth estimation is better than the conventional stress-strain relationship assuming elastic-perfectly plastic materials.続きを見る |
| 目次 | 1. INTRODUCTION 2. OVERVIEW OF THE METHOD FOR ESTIMATING CYCLIC TRUE STRESS-STRAIN RELATIONSHIP 3. NUMERICAL SIMULATION OF FATIGUE CRACK PROPAGATION 4. CONCLUSION ACKNOWLEDGEMENTS REFERENCES |
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| 登録日 | 2023.11.13 |
| 更新日 | 2023.11.17 |