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, Naoya Tada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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
Title of host publicationAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
PublisherPubl by ASME
Pages123-127
Number of pages5
Volume163
Publication statusPublished - 1989
Externally publishedYes
EventSeismic Engineering - 1989: Design, Analysis, Testing, and Qualification Methods - Honolulu, HI, USA
Duration: Jul 23 1989Jul 27 1989

Other

OtherSeismic Engineering - 1989: Design, Analysis, Testing, and Qualification Methods
CityHonolulu, HI, USA
Period7/23/897/27/89

Fingerprint

Fracture toughness
Creep
Grain boundaries
Fatigue of materials
Cracks
Computer simulation
Normal distribution
Stochastic models
Random variables

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

Cite this

Ohtani, R., Kitamura, T., & Tada, N. (1989). Numerical simulation of initiation and early propagation of creep-fatigue small cracks based on a model of random fracture resistance of grain boundaries. In 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.

American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. Vol. 163 Publ by ASME, 1989. p. 123-127.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ohtani, R, Kitamura, T & Tada, N 1989, Numerical simulation of initiation and early propagation of creep-fatigue small cracks based on a model of random fracture resistance of grain boundaries. in 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.
Ohtani R, Kitamura T, Tada N. Numerical simulation of initiation and early propagation of creep-fatigue small cracks based on a model of random fracture resistance of grain boundaries. In American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. Vol. 163. Publ by ASME. 1989. p. 123-127
Ohtani, R. ; Kitamura, T. ; Tada, Naoya. / Numerical simulation of initiation and early propagation of creep-fatigue small cracks based on a model of random fracture resistance of grain boundaries. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. Vol. 163 Publ by ASME, 1989. pp. 123-127
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