[1] Su Chun, Qu ZhongzhouHao Huibing,. Reliability assessment consideringdependent competing failure process and shifting-threshold [J]. Journal of Southeast University (English Edition), 2013, 29 (1): 52-56. [doi:10.3969/j.issn.1003-7985.2013.01.011]

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Reliability assessment consideringdependent competing failure process and shifting-threshold()

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

Volumn:

29

Issue:

2013 1

Page:

52-56

Research Field:

Mechanical Engineering

Publishing date:

2013-03-20

Info

Title:

Reliability assessment consideringdependent competing failure process and shifting-threshold

Author(s):

Su Chun;  Qu ZhongzhouHao Huibing

School of Mechanical Engineering, Southeast University, Nanjing 211189, China

Keywords:

degradation;  hard failure;  dependent competing failure process;  cumulative shock model;  shifting-threshold

PACS:

TH17

DOI:

10.3969/j.issn.1003-7985.2013.01.011

Abstract:

The reliability assessment problem for products subject to degradation and random shocks is investigated. Two kinds of probabilistic models are constructed, in which the dependent competing failure process is considered. First, based on the assumption of cumulative shock, the probabilistic models for hard failure and soft failure are built respectively. On this basis, the dependent competing failure model involving degradation and shock processes is established. Furthermore, the situation of the shifting-threshold is also considered, in which the hard failure threshold value decreases to a lower level after the arrival of a certain number of shocks. A case study of fatigue crack growth is given to illustrate the proposed models. Numerical results show that shock has a significant effect on the failure process; meanwhile, the effect will be magnified when the value of the hard threshold shifts to a lower level.

References:

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Memo

Memo:

Biography: Su Chun(1970—), male, doctor, associate professor, suchun@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.50405021), Graduate Training Innovative Projects Foundation of Jiangsu Province(No.CXLX12_0081).
Citation: Su Chun, Qu Zhongzhou, Hao Huibing. Reliability assessment considering dependent competing failure process and shifting-threshold[J].Journal of Southeast University(English Edition), 2013, 29(1):52-56.[doi:10.3969/j.issn.1003-7985.2013.01.011]

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