RELIABILITY ANALYSIS OF MULTIPLE SITE DAMAGE STRUCTURE
The problem of multiple site damage (MSD) has got more attention in ageing structures. Cracks caused by MSD are extremely difficult to detect and greatly reduce the residual strength, fatigue life and overall structural integrity of aircraft panels. The aim of this paper is: establishing an analysis method to evaluate the reliability of the structure occurring MSD. Analysis shows that the structural reliability level is the probability dominating the multidimension random variable of crack growth, which fall into the space surrounded by the equal-surface and the coordinate surface. That’s the integral of the probability density function of multi-dimension random variable in the space. Different reliability analysis models, such as completed integral reliability model, simply series reliability model and modified simply series reliability model, were presented and applied aiming at different problems. An example has been provided to illustrate the reliability analysis applied on the structure and verifies the correctness of the presented models. The example shows that the reliability of MSD structure degrades very fast relative to time.
Zhao Libin Zhang Jianyu Long Liping Fei Binjun
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100083, PR China Institute of Solid Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, PR
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）