### Abstract

A stochastic model and a method of simulation of the initiation and the early propagation of creep-fatigue small cracks along grain boundaries were proposed. In the model, grain boundaries between two adjacent triple points were projected and linked on a straight line perpendicular to the applied stress axis, and their length was given as random variables of a normal distribution. The grain boundaries had their own fracture resistances, the magnitudes of which were given as uniform random numbers. The fracture resistance of each grain boundary decreased by a constant magnitude corresponding to the driving force of one fatigue cycle. When the resistance became zero or a negative value, the grain boundary was assumed to fracture and to yield an intergranular facet of small crack.

Original language | English |
---|---|

Title of host publication | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |

Publisher | Publ by ASME |

Pages | 123-127 |

Number of pages | 5 |

Volume | 163 |

Publication status | Published - 1989 |

Externally published | Yes |

Event | Seismic Engineering - 1989: Design, Analysis, Testing, and Qualification Methods - Honolulu, HI, USA Duration: Jul 23 1989 → Jul 27 1989 |

### Other

Other | Seismic Engineering - 1989: Design, Analysis, Testing, and Qualification Methods |
---|---|

City | Honolulu, HI, USA |

Period | 7/23/89 → 7/27/89 |

### Fingerprint

### ASJC Scopus subject areas

- Industrial and Manufacturing Engineering
- Mechanical Engineering

### Cite this

*American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP*(Vol. 163, pp. 123-127). Publ by ASME.

**Numerical simulation of initiation and early propagation of creep-fatigue small cracks based on a model of random fracture resistance of grain boundaries.** / Ohtani, R.; Kitamura, T.; Tada, Naoya.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP.*vol. 163, Publ by ASME, pp. 123-127, Seismic Engineering - 1989: Design, Analysis, Testing, and Qualification Methods, Honolulu, HI, USA, 7/23/89.

}

TY - GEN

T1 - Numerical simulation of initiation and early propagation of creep-fatigue small cracks based on a model of random fracture resistance of grain boundaries

AU - Ohtani, R.

AU - Kitamura, T.

AU - Tada, Naoya

PY - 1989

Y1 - 1989

N2 - A stochastic model and a method of simulation of the initiation and the early propagation of creep-fatigue small cracks along grain boundaries were proposed. In the model, grain boundaries between two adjacent triple points were projected and linked on a straight line perpendicular to the applied stress axis, and their length was given as random variables of a normal distribution. The grain boundaries had their own fracture resistances, the magnitudes of which were given as uniform random numbers. The fracture resistance of each grain boundary decreased by a constant magnitude corresponding to the driving force of one fatigue cycle. When the resistance became zero or a negative value, the grain boundary was assumed to fracture and to yield an intergranular facet of small crack.

AB - A stochastic model and a method of simulation of the initiation and the early propagation of creep-fatigue small cracks along grain boundaries were proposed. In the model, grain boundaries between two adjacent triple points were projected and linked on a straight line perpendicular to the applied stress axis, and their length was given as random variables of a normal distribution. The grain boundaries had their own fracture resistances, the magnitudes of which were given as uniform random numbers. The fracture resistance of each grain boundary decreased by a constant magnitude corresponding to the driving force of one fatigue cycle. When the resistance became zero or a negative value, the grain boundary was assumed to fracture and to yield an intergranular facet of small crack.

UR - http://www.scopus.com/inward/record.url?scp=0024903927&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024903927&partnerID=8YFLogxK

M3 - Conference contribution

VL - 163

SP - 123

EP - 127

BT - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP

PB - Publ by ASME

ER -