Failure Rate Model of Components with the Number of Load Application as Life Parameter
The failure rate model of components with the number of load application as life parameter is developed in this paper.Taking static strength failure and fatigue failure as the backgrounds, the dynamic reliability models of components under random repeated load without strength degradation and those with strength degradation are derived,respectively.Then, the failure rate model of components with the number of load application as life parameter is derived without strength degradation and those with strength degradation are derived,respectively. The relationship between reliability and the number of load application, and that between failure rate and the number of load application are discussed in different cases. The result shows that even though when strength doesnt degenerate,both reliability and failure rate of components decrease as the number of load application increases, and the failure rate curve has the partial character of bathtub curve with early failure period and random failure period. When strength degenerates with the number of load application, the reliability of components decreases more obviously, and the failure rate curve of components is bathtub-shaped.
failure rate reliability model the number of load application load-strength interference
Wang Zheng Kang Rui
Institute of Reliability Engineering Beijing University of Aeronautics and Astronautics Beijing,China
国际会议
2009 8th International Conference on Reliability,Maintainability and Safety(第八届中国国际可靠性、维修性、安全性会议)
成都
英文
241-244
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）