含开孔复合材料构件的安全系数分析  

STATISTICAL ANALYSIS ON SAFETY FACTOR OF NOTCHED COMPOSITE LAMINATES

作　　者：颜芳芳[1] 邓克绪[1] 

机构地区：[1]南京航空航天大学无人机研究院,南京210016

出　　处：《机械强度》2014年第1期57-60,共4页Journal of Mechanical Strength

基　　金：国家自然科学基金(51105194)资助~~

摘　　要：通过对T300/5405含孔复合材料层压板拉伸强度试验数据的统计分析,指出开孔后拉伸强度符合两参数Weibull分布。在此基础上,讨论了开孔强度服从Weibull分布,应力服从正态分布时,复合材料基于基准许用值安全系数与可靠度之间的关系。给出了一些常用复合材料在不同应力变异系数和不同可靠度要求下的A基准值和B基准值安全系数的统计取值范围。试验数据对比分析结果表明:含孔层压板与光滑层压板在获得同样可靠度的要求下,安全系数取值范围相近。并且在相同可靠度要求下,A基准值安全系数小于B基准值安全系数。The test data of tensile strength have been statistically analyzed for T300/5405 composite laminated plate containing a hole. It is indicated that a two-parameter Weibull distribution can be used to describe the data of the tensile strength. Based on the reliability model in which Normal distribution is used for the stress and Weibull distribution with two parameters for strength of composite materials, the relationships between safety factor and reliability of some fiber-reinforced plastics are statistically analyzed. The scatter bounds of safety factors based on ＂A value＂ and ＂B value＂ of notched laminate are presented under the different variation coefficient of the stress and the different reliability. The results show when the laminates with a hole and the smooth composite laminates satisfied for a same reliability requirement, the safety factor ranges is close. Under the same reliability, the value of ＂A value＂ is smaller than the value of ＂B value＂ safety factor.

关 键 词：复合材料 可靠度 安全系数 含孔层压板 

分 类 号：TB323[一般工业技术—材料科学与工程] O213.2[理学—概率论与数理统计]