多级复合材料蜂窝结构的力学性能

《复合材料学报》优先在线发表论文。

摘  要：根据多级结构设计思想，把高性能PMI泡沫（聚甲基丙烯酰亚胺）加入到单向增强碳纤维复合材料之间，对多级复合材料蜂窝结构进行制备。对多级复合材料蜂窝结构的平压性能进行了研究，包括多级复合材料蜂窝结构平压性能的理论预报与试验验证。选用合适的PMI泡沫制备多级复合材料蜂窝结构，研究了多级复合材料蜂窝结构平压性能随结构等效密度变化的关系。并对多级复合材料蜂窝结构的三点弯曲性能进行了研究，主要包括理论预报与试验验证。通过理论研究对结构的失效模式进行了预报，绘制了失效模式机制图，并通过三点弯曲试验对理论预报结果进行了验证。

关键词：复合材料；蜂窝结构；多级结构；平压性能；三点弯曲性能

Abstract: According to hierarchical structural design idea, a high-performance PMI foam （Polymethylallyl imide）was added between the unidirectional reinforced carbon fiber composite materials to prepare hierarchical composite honeycomb structure. The out-of-plane compressive performance of hierarchical composite honeycomb structures were studied, including theoretical prediction and experimental verification of the out-of-plane compressive performance of hierarchical composite honeycomb structures. The hierarchical composite honeycomb structure was prepared by using suitable PMI foam. The relationship between the out-of-plane compressive properties of hierarchical composite honeycomb structure and the structural equivalent density was studied. The three-point bending performance of hierarchical composite honeycomb structure is studied, including theoretical prediction and experimental verification. The failure mode of the structure was predicted by theoretical research, the failure mode mechanism diagram was drawn, and the theoretical prediction results were verified by three-point bending test.

Keywords: composite material; honeycomb structure; hierarchical structure; out-of-plane compressive performance; three-point bending performance

作者：杨志韬等，哈尔滨工程大学 先进船舶材料与力学工信部重点实验室，哈尔滨

通讯作者：于国财，哈尔滨工程大学 先进船舶材料与力学工信部重点实验室，哈尔滨

全文详见中国知网学术期刊优先数字出版。