Analysis of the intergranular cracking process inside polycrystalline heat-resistant materials under creep-fatigue conditions

Conference · Wed Dec 31 00:00:00 EST 1997

OSTI ID:624248

Tada, Naoya; Zhou, W; Kitamura, Takayuki; Ohtani, Ryuichi ^[1]

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1. Kyoto Univ. (Japan). Dept. of Engineering Physics and Mechanics

In order to investigate the intergranular failure process in polycrystalline materials under creep-dominant fatigue, numerical simulation of inner small cracks was conducted on the basis of a simple probabilistic model. Although the simulation condition is determined from experimental observation of the cross section of specimens interrupted at different fatigue cycles, the simulation is carried out continuously and reproduces inner cracking behavior throughout the fatigue life. This enables one not only to extract the spatial distribution of inner cracks at arbitrary creep-fatigue cycles, but also to calculate the propagation rate of each inner crack.

• OSTI ID: 624248
• Report Number(s): CONF-950618-; ISBN 0-8031-2413-9; TRN: IM9820%%216
• Resource Relation: Conference: 27. ASTM symposium on fatigue and fracture mechanics, Williamsburg, VA (United States), 26-29 Jun 1995; Other Information: PBD: 1997; Related Information: Is Part Of Elevated temperature effects on fatigue and fracture; Piascik, R.S. [ed.] [NASA Langley Research Center, Hampton, VA (United States)]; Gangloff, R.P. [ed.] [Univ. of Virginia, Charlottesville, VA (United States)]; Saxena, A. [ed.] [Georgia Inst. of Tech., Atlanta, GA (United States)]; PB: 234 p.; ASTM special technical publication, 1297
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRACK PROPAGATION
HEAT RESISTANT MATERIALS
POLYCRYSTALS
CREEP
FATIGUE
MATHEMATICAL MODELS
FRACTURE MECHANICS