Reliability analysis of PBX circular arch using monte carlo stochastic finite element method
In order to consider the impact of press process, processing, loading and other uncertainties on the reliability of Polymer Bonder Explosive (PBX) components, Monte Carlo stochastic finite element method (SFEM) is used in this paper.For the free boundary compression of the circular arch, it is assumed that all parameters obey the normal distribution and the coefficient of variation is 0.1.The influence of the non-uniformity of the material parameters, the dispersion of the geometrical dimensions and the boundary conditions on the strength (ie, the maximum tensile stress) and the stiffness (ie, the maximum vertical displacement) of the circle arch are simulated and analyzed.The results show that the three have a great influence on the strength and stiffness of the PBX arch,and the effect of dimensions dispersion is most significant, the variation coefficient of which has reached 0.24 and 0.28 respectively.Besides, the dispersibility caused by the inner radius and friction coefficient no longer corresponds to a normal distribution while that caused by elastic moduli still obeys the normal distribution.The analysis of the bearing capacity of PBX components should fully consider the dispersion of the parameters.
Dispersion PBX circle arch Monte Carlo stochastic finite element Reliability
Hong-wei YUAN Lin-gang LAN Long ZHAO Tian-bao DONG Xiao-lin YAN Wei TANG
Institute of Chemical Materials, CAEP, Mianyang 621999, China
国际会议
2018 International Conference on Defence Technology (2018国际防务技术会议)
北京
英文
261-268
2018-10-21（万方平台首次上网日期，不代表论文的发表时间）