Numerical simulation of fatigue crack growth with stress-strain relationship under cyclic loading

IR (HANDLE) Open Access
  • SHIMOOKA, Tsukasa
    Department of Naval Architecture and Ocean Engineering, Graduate School of Engineering, Kyushu University : Master course student
  • MURAKAMI, Koji
    Technical Division, School of Engineering, Kyushu University : Senior Technician
  • MATSUDA, Kazuki
    Department of Marine Systems Engineering, Faculty of Engineering, Kyushu University : Associate Professor
  • GOTOH, Koji
    Department of Marine Systems Engineering, Faculty of Engineering, Kyushu University : Professor

Description

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 stress-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.

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Details 詳細情報について

  • CRID
    1050017057726474112
  • HANDLE
    2324/7157018
  • Text Lang
    en
  • Article Type
    conference paper
  • Data Source
    • IRDB

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