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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 853Three Dimensional Criterion for Creep Crack...

Three Dimensional Criterion for Creep Crack Propagation in C(T) Specimen

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Abstract:

Experimental of two kinds of compact tension (CT) specimens’ creep crack propagation are carried out in this paper. Traditional fracture mechanics and three-dimensional fracture theory are compared and the results show that: The K-Tz two-parameter model can eliminate the thickness-effect on the crack growth rates in the relatively low K range, however when K exceed certain values the effect of thickness for crack growth rates still exists; The Ct and Ct-Tz model can describe the thickness-effect of creep crack growth rates in regions of high Ct; When the crack tip stress intensity factor K of the two kinds of thickness (B=5 mm, B=10 mm) specimens equal to 35 and 31 respectively, this material’s creep crack growth control parameter change from K to Ct.

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Periodical:

Applied Mechanics and Materials (Volume 853)

Pages:

142-147

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.853.142

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Online since:

September 2016

Authors:

Wen Ming Ye, Xu Teng Hu*, Wan Lin Guo, Ying Dong Song

Keywords:

Creep Crack Propagation, Stress Triaxiality Constraint, Thickness-Effect, Three Dimension Fracture

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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