论文部分内容阅读
在分析复合材料构件成型和制孔过程中产生缺陷的基础上,从构件成型质量、连接孔加工质量和连接孔配合质量3个方面研究了影响装配应力分布的主要因素及其影响规律。研究发现,装配间隙为1.0mm时,连接区最大应力可达537MPa;垂直度误差为1°时,连接区最大应力超过300MPa;连接孔同轴度误差为0.03mm时,连接区最大应力可达443MPa。装配应力过大引起材料内部成型缺陷和制孔损伤的进一步扩展,形成二次损伤,严重影响装配质量。通过合理设计结构和铺层、优化成型工艺和制孔参数,可以减少初始损伤;采用自动化装配技术、优化工装结构、合理安排装配工序和应用填隙补偿工艺降低装配应力,进而有效抑制二次损伤的诱发与扩展,为实现大型复合材料承力构件的高质量精准连接装配提供理论方法和技术支持。
Based on the analysis of defects in the forming and punching process of composite materials, the main factors influencing the stress distribution of assembly and their influence laws are studied from the aspects of forming quality of components, processing quality of connecting holes and matching quality of connecting holes. The results show that the maximum stress of the connection zone can reach 537MPa when the assembly gap is 1.0mm, the maximum stress of the connection zone exceeds 300MPa when the verticality error is 1 °, and the maximum stress of the connection zone can reach up to 0.03mm 443MPa. The assembly stress is too large to cause the material forming defects and the hole to further expand the damage, the formation of secondary damage, seriously affecting the assembly quality. The initial damage can be reduced by reasonably designing the structure and lay-up, optimizing the forming process and the hole making parameters, and adopting automatic assembly technology to optimize the structure of the tooling, arranging the assembly process reasonably and applying the caulking compensation process to reduce the assembly stress so as to effectively restrain the secondary damage Of the induced and expanded, in order to achieve large-scale composite material bearing components of high quality and precision connection assembly to provide theoretical methods and technical support.