中国机械工程Issue(19)：2682-2686,2687,6.DOI:10.3969/j.issn.1004-132X.2015.19.022
“瓦伦”结构旋转冲击失效建模方法研究
Study on Modeling Method for Failure of a Warren Structure under Whirligig Impact Load
摘要
Abstract
A modeling method to simulate the failure of a superplastic forming/diffusion bonding titanium Warren girder structure under whirligig impact load was investigated herein.In the proposed model,the effects of local stress concentration and local defect distribution at the girder areas were considered by defining effective tensile and shear strengths.The diffusion bond was incorporated into the finite element model through tie-break contact algorithm.Then,the calibrated bond strength was implemented in the numerical model,of which the result was further compared with whirligig impact tests to validate the rationality of the modeling method.The results show that the proposed method can effectively simulate the failure of the Warren girder structure under whirligig impact load.关键词
超塑成形/扩散连接/瓦伦结构/旋转冲击试验/数值仿真Key words
superplastic forming/diffusion bonding/Warren structure/whirligig impact test/numerical simulation分类
航空航天引用本文复制引用
史同承,柴象海,洪伟荣..“瓦伦”结构旋转冲击失效建模方法研究[J].中国机械工程,2015,(19):2682-2686,2687,6.基金项目
国家自然科学基金资助项目(51205377) （51205377）
航空科学基金资助项目(2012ZBN2003) （2012ZBN2003）
上海市科学技术委员会基础研究重大项目(12DJ1400500) （12DJ1400500）
