## 抄録

The CED (Crack Energy Density) in an arbitrary direction, E_{φ{symbol}}, is defined as the quantity which has the meaning of strain energy area density in the plane containing a crack front line without any restriction on constitutive equation. We may expect that, as far as the opening type fracture occurs, a mixed mode crack begins to grow in the direction φ{symbol} where E_{φ{symbol}}^{I} (mode I contribution of E_{φ{symbol}}) takes the maximum value, E_{φ{symbol}max}^{I}, when E_{φ{symbol}max}^{I} reaches a critical value peculiar to a material (we call this criterion E_{φ{symbol}max}^{I} criterion). In this paper, the applicability of this E_{φ{symbol}max}^{I} criterion to elastic-plastic fractures is studied based on the fracture experiments on specimens of Aluminum alloy with a crack inclined to the loading axis and it is demonstrated that the onset and the direction of crack growth can be estimated by E_{φ{symbol}max}^{I} criterion in either case of fractures with relatively small yielding region and those with large yielding region. The applicability of E_{φ{symbol}max}^{I} criterion to elastic (quasi-elastic) fractures is also shown through the comparison of the result by E_{φ{symbol}max}^{I} criterion with the results by other criteria and experimental results.

本文言語 | English |
---|---|

ページ（範囲） | 101-111 |

ページ数 | 11 |

ジャーナル | Nuclear Engineering and Design |

巻 | 142 |

号 | 1 |

DOI | |

出版ステータス | Published - 1993 7月 2 |

外部発表 | はい |

## ASJC Scopus subject areas

- 核物理学および高エネルギー物理学
- 原子力エネルギーおよび原子力工学
- 材料科学（全般）
- 安全性、リスク、信頼性、品質管理
- 廃棄物管理と処理
- 機械工学