复合材料褶皱夹芯结构的制备及压缩性能研究  

Preparation and Compression Performance of Composite Folded Sandwich Structure

作　　者：杨阳[1] 王新筑[1] 蹇开林[1] YANG Yang;WANG Xin-zhu;JIAN Kai-lin(College of Aerospace Engineering,Chongqing University,Chongqing 400040,China)

机构地区：[1]重庆大学航空航天学院,重庆400040

出　　处：《包装工程》2022年第23期144-151,共8页Packaging Engineering

基　　金：重庆市留创计划创新类项目(cx2020001);重庆市技术创新与应用发展专项融合创新重点项目(Z20211357)。

摘　　要：目的探究复合材料褶皱芯子的一次性成型工艺,并研究浸胶量对褶皱夹芯结构压缩性能的影响。方法以V型褶皱夹芯结构为研究对象,首先采用真空吸附成型工艺制备V型复合材料褶皱芯子,然后通过黏接工艺将碳纤维复合材料层合板与褶皱芯子进行复合,得到复合材料褶皱夹芯结构,最后通过实验测试,研究该结构在压缩载荷作用下的力学性能和失效模式,以及不同浸胶量对其压缩性能的影响。结果采用真空吸附成型工艺能够一次性制备出褶皱芯子,其成型精度有待提高;由压缩实验可知,褶皱夹芯结构先从壁面开始失效,后逐步扩散至棱线处,最终导致芯子的整体失效;由压缩实验测试结果可知,浸胶量(质量分数)为11%、17%、22%的褶皱夹芯结构的破坏载荷分别为362.853、420.521、471.389 N。结论采用真空吸附成型工艺可一次性成型出褶皱芯子,其制备效率较高,但存在成型尺寸精度不高问题,后续需要进一步改进;在一定范围内,复合材料褶皱夹芯结构的压缩破坏载荷与芯子的浸胶量近似成正比例线性关系。The work aims to explore the one-off forming process of composite folded core and study the effect of dipped glue concentration on the compression performance of folded sandwich structure.V-shaped folded sandwich structure was taken as the research object.Firstly,the vacuum draw forming was used to build a V-shaped composite folded core.Then,the folded core was compounded with the carbon fiber composite laminate by a bonding process to obtain the composite folded sandwich structure.Finally,the mechanical properties and failure modes of the structure under the action of compression load were investigated by experimental tests and the effects of different dipped glue concentration on the compression performance were analyzed.The folded core was prepared by the vacuum draw forming at one time,but the forming precision was required to be improved.From the compression test,the failure of the folded sandwich structure began with the core wall,gradually expanded to the prism lines,and finally reached the whole core.The failure load of the folded sandwich structure under the glue concentrations of 11%,17%and 22%was 362.853 N,420.521 N,and 471.389 N,respectively.The vacuum draw forming can prepare the folded core at one time with high efficiency,but it still needs to be improved due to low precision of forming size.In a certain range,the ultimate compression load of the composite folded sandwich structure is approximately proportional to the dipped glue concentration.

关 键 词：V型褶皱夹芯结构 真空吸附成型工艺 压缩性能 失效模式 

分 类 号：O341[理学—固体力学] TB484[理学—力学]