复合材料纵向圆形波纹圆柱壳轴向压缩失效特性研究  

Study on axial compression failure characteristics of composite longitudinal circular corrugated cylindrical shell

作　　者：梁泽乾 魏刚[1] 李想 LIANG Zeqian;WEI Gang;LI Xiang(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300

出　　处：《复合材料科学与工程》2023年第5期45-52,70,共9页Composites Science and Engineering

基　　金：中国民航大学大学生创新创业实践项目(202010059004)。

摘　　要：结构轻量化、材料高效易造化是航空航天乃至其他工业领域(汽车、建筑、基础设施等)的不断追求。纤维增强复合材料的使用可以有效减轻结构重量,提高承载能力。复合材料纵向圆形波纹结构可以大大提高结构轴向压缩时的载荷/质量效率,从而满足航空航天领域对新型复合材料及结构的强度要求。自行设计模具并制备出复合材料纵向圆形波纹圆柱壳,并对其开展轴向压缩性能研究。结果表明:与等厚度、等横截面积圆柱壳比较,纵向圆形波纹圆柱壳承受轴向载荷的能力明显增强;相同结构、不同厚度的纵向圆形波纹圆柱壳,在压缩过程中其破坏形式因厚度增加而发生改变,由整体的屈曲变形转变为端面局部的压溃失效。建立并验证了数值计算模型,考虑了典型设计参数的影响,结果表明,在制备条件允许的情况下,减小单胞尺寸有利于提高纵向圆形波纹圆柱壳抗轴压性能,而降低高度则效果不明显。本文研究结果可为纵向波纹圆柱壳在结构吸能方面的应用提供参考。Lightweight structure and high-efficiency materials are the pursuit of aerospace and other industrial fields,such as automobiles,buildings,infrastructure,etc.The use of fiber-reinforced composites can effectively reduce the weight of the structure and improve the load-bearing capacity.The longitudinal circular corrugated structure of composite materials can greatly improve the load/mass efficiency of structural axial compression,thereby meeting the strength requirements of new composite materials and structures in the aerospace field.Based on the selfdesigned mould,the composite circular corrugated cylindrical shell was fabricated by vacuum bag hot-pressing method.On this basis,the axial compression performance of the structure is studied.The results show that compared with ordinary cylindrical shells with equal thickness and cross-sectional area,the ability of longitudinal circular corrugated cylindrical shells to bear axial load is significantly enhanced.For longitudinal circular corrugated cylindrical shells with the same structure and different thickness,the failure mode changes from overall buckling deformation to local crushing failure of the end face due to the increase of thickness.The numerical model was established and veri-fied,and the influence of typical design parameters on axial compression performance of longitudinal circular corrugated cylindrical shell was simulated.The results show that when the preparation conditions are allowed,decreasing the size of single cell is beneficial to improving the axial compression resistance of longitudinal circular corrugated cylindrical shell,while decreasing the height has no obvious effect.The research results can provide reference for the application of longitudinal corrugated cylindrical shells in energy absorption of structures.

关 键 词：复合材料 纵向圆形波纹圆柱壳 轴向压缩 失效特性 

分 类 号：TB332[一般工业技术—材料科学与工程]