摘要
为分析复合材料连接件的参数影响规律,优化常规参数间的配比,提升结构经济性与实用性,针对板厚、端径比和预紧力三个制造装配阶段的显著连接参数开展拉伸强度影响研究。结合UMAT子程序建立了CFRP螺栓连接件有限元模型,开展了静力拉伸破坏及SEM损伤观测试验验证有限元模型;在此基础上,基于Box-Behnken设计,结合响应回归方程、3D响应面以及等高线图建立承载强度与影响因素联合响应模型,从单因素、多因素交互作用等方面对三个参数进行了分析,所建立的联合响应模型决定系数R^(2)为0.9847,Adj R^(2)为0.9571,Pred R^(2)为0.7944,模型拟合效果和预测能力较好;分析结果表明,三个参数中,板厚是影响承载强度的最显著单因素,而板厚与端径比的交互作用影响最为显著,模型给出了板厚、端径比和预紧力的优化组合,预测强度与有限元结果误差为0.37%,表明所建立联合响应模型有较好的强度预测能力。
In order to analyze the influence of the parameters of composite connectors,optimize the ratio between conventional parameters,and improve the structural economy and practicability,the influence of tensile str-ength on the significant connection parameters in the three manufacturing and assembly stages of plate thickness,end-diameter ratio and preload was studied.Combined with the UMAT subroutine,the finite element model of CFRP bolted joints was established,and the static tensile failure and SEM damage observation tests were carried out to verify the finite element model.On this basis,based on the Box-Behnken design,combined with the response regression equation,3D response surface and contour map,the joint response model of bearing strength and influencing factors was established,and the three parameters were analyzed from the aspects of single factor and multi-factor interaction,and the determined coefficient R^(2)of the joint response model was 0.9847,Adj R^(2)is 0.9571,Pred R^(2)value is 0.7944,the model fitting effect and prediction ability are better;the analysis results show that plate thickness is the most significant single factor affecting the bearing strength among the three parameters,and the interaction between plate thickness and end-diameter ratio has the most significant effect,and the model gives an optimization of plate thickness,end-diameter ratio and preload,and the error between the predicted strength and the finite element result is 0.37%,indicating that the established joint response model has a good strength prediction ability.
作者
孙昕阳
武涛
朱兆轩
黄严
SUN Xinyang;WU Tao;ZHU Zhaoxuan;HUANG Yan(School of Transportation Science and Engineering,Civil Aviation University of China,Tianjin 300300,China;Laboratory of National Defense Key Discipline of Digitalization of Aviation Manufacturing Technology,Shenyang Aerospace University,Shenyang 110136,China)
出处
《复合材料科学与工程》
北大核心
2025年第11期20-29,共10页
Composites Science and Engineering
基金
沈阳航空航天大学航空制造工艺数字化国防重点学科实验室开放基金资助项目(SHSYS202410)
国家自然科学基金(U2033209)。
关键词
复合材料
螺栓连接
响应面法
交互作用
优化组合
composites
bolted connections
response surface method
interactions
optimization
