[1] Zhu Lin, Jia Minping, Jiang Changcheng, et al. Estimation of structure crack propagationbased on multiple factors correction [J]. Journal of Southeast University (English Edition), 2017, 33 (1): 39-45. [doi:10.3969/j.issn.1003-7985.2017.01.007]

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

33

Issue:

2017 1

Page:

39-45

Research Field:

Mechanical Engineering

Publishing date:

2017-03-30

Info

Title:

Estimation of structure crack propagationbased on multiple factors correction

Author(s):

Zhu Lin¹;  2;  Jia Minping¹;  Jiang Changcheng¹;  Zhang Wan¹

¹School of Mechanical Engineering, Southeast University, Nanjing 211189, China
²Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, VIC 3800, Australia

Keywords:

estimation study;  crack propagation;  multiple factor correction;  probability density function

PACS:

TH123

DOI:

10.3969/j.issn.1003-7985.2017.01.007

Abstract:

By deriving the stress concentration factor of the estimation approach for residual fatigue life, an estimation approach for structure crack propagation based on multiple factors correction is proposed. Then, the quantitative expression among the structure factor, stress ratio, loading type, the manufacture processing factor and the crack propagation is achieved. The proposed approach is implemented in a case study for an instance structure, and the influences of correction factors on the crack propagation are analyzed. Meanwhile, the probabilistic method based on Weibull distribution probability density function is selected to evaluate the precision of the corrected estimation approach, and the probability density of results is calculated by the probability density function. It is shown that the results estimated by the corrected approach is more precise than those estimated by the fracture mechanics, and they are closer to the test data.

References:

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Memo

Memo:

Biographies: Zhu Lin(1990—), male, graduate; Jia Minping(corresponding author), male, doctor, professor, mpjia@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.51675098), Chinese Specialized Research Foundation for Doctoral Program of Higher Education(No.20130092110003), Graduate Student Research Innovation Foundation of Jiangsu Province(No.KYLX15_0059).
Citation: Zhu Lin, Jia Minping, Jiang Changcheng, et al. Estimation of structure crack propagation based on multiple factors correction[J].Journal of Southeast University(English Edition), 2017, 33(1):39-45.DOI:10.3969/j.issn.1003-7985.2017.01.007.

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