三维角联锁机织铺层复合材料的拉伸性能与失效机制  

Tensile properties and failure mechanism of three-dimensional angle interlocking woven layup composites under tensile loading

作　　者：朱超 吴宁[1,2] 张一帆[1,2] 焦亚男[1,2] 陈利[1,2] 刘刚 ZHU Chao;WU Ning;ZHANG Yifan;JIAO Yanan;CHEN Li;LIU Gang(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;Key Laboratory of Advanced Textile Composite Materials,Ministry of Education,Tiangong University,Tianjin 300387,China;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Center for Advanced Low-dimension Materials,Donghua University,Shanghai 201620,China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387 [2]天津工业大学先进纺织复合材料教育部重点实验室,天津300387 [3]东华大学先进低维材料中心纤维材料改性国家重点实验室,上海201620

出　　处：《复合材料学报》2022年第7期3167-3177,共11页Acta Materiae Compositae Sinica

基　　金：天津市教委科研计划重点项目(2019ZD03);国家自然科学基金(11802204);天津市高等学校创新团队培养计划(TD13-5043)。

摘　　要：采用树脂传递模塑(Resin transfer molding,RTM)工艺方法制备了三维角联锁机织铺层复合材料,着重探讨了单层厚度对复合材料拉伸性能以及失效机制的影响。结果表明,复合材料的拉伸强度随着单层厚度的增大而显著增加,纤维体积含量相同时单层厚度对拉伸模量影响较小;在拉伸断裂过程中,各层断裂不同步,单层厚度的增加会加深各单层之间破坏应变的差异;失效试样分层现象显著,单层内未出现明显裂纹,经纱脆性断裂显著,层间伴随着大量基体碎屑,失效模式主要涵盖了纤维断裂和抽拔、界面脱黏、基体开裂以及分层。The resin transfer molding(RTM) process was used to prepare the three-dimensional angle interlocking woven layup composites. The influence of the layer thickness on the tensile properties and failure mechanism was emphatically discussed. The results show that the tensile strength increases significantly with the enhancement of the layer thickness. In the case of similar fiber volume content, the layer thickness has little effect on the tensile modulus. In the process of tensile fracture, the break of each layer is not synchronized, and the augment of layer thickness deepens the diversity in failure strain between the individual layers. The failure samples have significant delamination, no obvious cracks appeared in the layer. The warp yarns show obvious brittle fracture and a large amount of resin chips appears in the interlamination. The failure modes mainly include fiber fracture and extraction, interface debonding, matrix cracking and delamination.

关 键 词：三维机织物 2.5D 单层厚度 拉伸性能 失效机制 

分 类 号：TB332[一般工业技术—材料科学与工程]