## 抄録

A dual-time-scale finite element model is developed in this paper for simulating cyclic deformation in polycrystalline alloys. The material is characterized by crystal plasticity constitutive relations. The finite element formulation of the initial boundary-value problems with cyclic loading involves decoupling the governing equations into two sets of problems corresponding to two different time-scales. One is a long-time-scale (low-frequency) problem characterizing a cycle-averaged solution, while the other is a short-time-scale (high-frequency) problem for a remaining oscillatory portion. Cyclic averaging together with asymptotic expansion of the variables in the time domain forms the basis of the multitime-scaling. The crystal plasticity equations at the two scales are used to study cyclic deformation of a titanium alloy Ti-6Al. This model is intended to study the fatigue response of a material by simulating a large number of cycles to initiation.

本文言語 | 英語 |
---|---|

ページ（範囲） | 183-200 |

ページ数 | 18 |

ジャーナル | Journal of Strain Analysis for Engineering Design |

巻 | 42 |

号 | 4 |

DOI | |

出版ステータス | 出版済み - 2007 |

外部発表 | はい |

## !!!All Science Journal Classification (ASJC) codes

- モデリングとシミュレーション
- 材料力学
- 機械工学
- 応用数学