基于渐进损伤分析的复合材料螺栓连接强度包线法研究

复合材料学报, 2015, 32(3): 823-830. doi: 10.13801/j.cnki.fhclxb.20150609.001

基于渐进损伤分析的复合材料螺栓连接强度包线法研究

赵丽滨 ^1, , 秦田亮 ^2, , 山美娟 ^3, , 张建宇 ^4,

1.北京航空航天大学宇航学院,北京,100191

2.北京航空航天大学宇航学院,北京,100191

3.北京航空航天大学宇航学院,北京,100191

4.北京航空航天大学固体力学研究所,北京,100191

基金项目: 国家自然科学基金(11372020)

关键词：复合材料 , 螺栓连接 , 结构强度 , 强度包线法 , 渐进损伤方法

Progressive damage analysis based strength envelope method research for composite bolted joints

Keywords： composites , bolted joints , structure strength , failure envelope method , progressive damage method

针对中国民机采用T800级复合材料这一新材料体系而基础数据匮乏的现状,采用渐进损伤分析(PDA)替代试验以显著降低研究周期和成本.综合渐进损伤方法和工程算法各自的优点,提出以渐进损伤分析替代应力集中减缓因子(SCRFs)测定试验,进而建立强度包线,并进行多钉连接强度预测的数值策略.为验证该数值策略的可行性,针对典型铺层应力集中减缓因子,测定试样,并开展渐进损伤分析,获得了试验件强度预测值来计算应力集中减缓因子,采用旁路载荷修正的强度包线法,绘制了典型铺层复合材料多钉连接旁路载荷修正强度包线,预测多钉连接的失效载荷,并与试验结果进行对比.结果表明:采用该数值策略预测的强度包线、多钉连接的失效载荷和失效模式均与试验结果吻合良好,证明了该数值策略的可行性.

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材料期刊网

基于渐进损伤分析的复合材料螺栓连接强度包线法研究

Progressive damage analysis based strength envelope method research for composite bolted joints

参考文献