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

R. Ohtani, T. Kitamura, N. Tada

Research output: Contribution to journalConference article

5 Citations (Scopus)

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 languageEnglish
Pages (from-to)123-127
Number of pages5
JournalAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume163
Publication statusPublished - Dec 1 1989
Externally publishedYes
EventSeismic Engineering - 1989: Design, Analysis, Testing, and Qualification Methods - Honolulu, HI, USA
Duration: Jul 23 1989Jul 27 1989

ASJC Scopus subject areas

  • Mechanical Engineering

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