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논문 기본 정보

자료유형
학술저널
저자정보
Jiao, Guang-Chen (Key Lab of Education Ministry of China for Power Machinery and Engineering, Shanghai Jiao Tong University) Wang, Wei-Zhe (Key Lab of Education Ministry of China for Power Machinery and Engineering, Shanghai Jiao Tong University) Jiang, Pu-Ning (Key Lab of Education Ministry of China for Power Machinery and Engineering, Shanghai Jiao Tong University)
저널정보
테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제43권 제3호
발행연도
2012.1
수록면
311 - 320 (10page)

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The higher-order asymptotic C(t) - $A_2(t)$ approach was employed to investigate the crack-tip stress of two collinear cracks in a power-law creeping material under the plane strain conditions. A comprehensive calculation was made of the single crack, collinear crack model with S/a = 0.4 and 0.8, by using the C(t) - $A_2(t)$ approach, HRR-type field and the finite element analysis; the latter two methods were used to check the constraint significance and the calculation accuracy of the C(t) - $A_2(t)$ approach, respectively. With increasing the creep time, the constraint $A_2$ was exponentially increased in the small-scale creep stage, while no discernible dependency of the constraint $A_2$ on the creep time was found at the extensive creep state. In addition, the creep time and the mechanical loads have no distinct influence on accuracy of the results obtained from the higher-order asymptotic C(t) - $A_2(t)$ approach. In comparison with the HRR-type field, the higher-order asymptotic C(t) - $A_2(t)$ solution matches well with the finite element results for the collinear crack model.

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