碳纳米管对热固性复合材料电阻焊接的增强作用  

Enhancement of Thermosetting Composites Resistance Welding by Carbon Nanotubes

作　　者：熊需海[1] 王道晟 任荣[1] 董佳鹏 崔旭[1,2] 郭子民 雷娟娟 李桂洋 陈平 XIONG Xuhai;WANG Daosheng;REN Rong;DONG Jiapeng;CUI Xu;GUO Zimin;LEI Juanjuan;LI Guiyang;CHEN Ping(Liaoning Key Laboratory of Advanced Polymer Matrix Composites,Shenyang Aerospace University,Shenyang 110136,China;School of Aeronautics Science and Engineering,Beihang University,Beiing 100191,China;Aerospace Long March Ariat Technology Co,Ltd,Tianjin 300301,China;State Key Laboratory of Fine Chemical,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]沈阳航空航天大学辽宁省先进聚合物基复合材料重点实验室,辽宁沈阳110136 [2]北京航空航天大学航空科学与工程学院,北京100191 [3]航天长征睿特科技有限公司,天津300301 [4]大连理工大学化工学院,精细化工国家重点实验室,辽宁大连116024

出　　处：《青岛科技大学学报（自然科学版）》2021年第5期54-61,共8页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51873109);辽宁省重点科技攻关计划项目(2018304026);中国博士后科学基金项目(2016M600222);辽宁省自然科学基金项目(2019ZD0246);辽宁省高等教育学校(境)外培养项目(2018LNGXGJWPYYB008).

摘　　要：研究表面接枝碳纳米管(CNTs)的电阻焊发热元件对热固性复合材料焊接头的增强作用.利用玻璃纤维增强聚醚酰亚胺(GF/PEI)薄片制备表面塑化的碳纤维增强双马树脂(CF/BMI)层合板;继而利用表面接枝CNTs的不锈钢网作为电阻焊的发热元件进行焊接.对接枝不同处理时长CNTs的不锈钢网的焊接件进行单搭接拉伸剪切实验,以评估焊接头的强度.结果表明:不锈钢网表面的浸润性明显改善,焊接头的强度得到显著提升.断口分析显示,在CNTs的增强作用下,失效模式由被焊接件表面纤维的轻微破坏转变为塑化薄层的完全撕裂.The effect of the heating element grafted with carbon nanotubes(CNTs)on the thermosetting composite welding joint was studied.The surface plasticized of carbon fiber re-inforced bismaleimide(CF/BMI)laminates were prepared by glass fiber reinforced poly-etherimide(GF/PEI)thin sheets;the stainless steel(SS)mesh grafted with CNTs is used as the heating element for resistance welding.A single lap tensile shear test was performed on sS mesh grafted with CNTs at different time to evaluate the strength of the welded joint.The results show that the surface wettability of the SS mesh and the strength of the welded joint can be improved significantly.Fracture analysis shows that under the reinforcement of CNTs,the failure mode changes from a slight failure of the surface fibers to a complete tear of the plasticized thin layer.

关 键 词：电阻焊接 热固性树脂基复合材料 碳纳米管 表面塑化 焊接强度 失效模式 

分 类 号：TB33[一般工业技术—材料科学与工程]