热固性树脂基复合材料结构电阻焊接研究

复合材料科学与工程 ›› 2015, Vol. 0 ›› Issue (10): 58-63.

热固性树脂基复合材料结构电阻焊接研究

刘洪波, 谢磊^*, 段玉岗, 李涤尘

西安交通大学机械制造系统工程国家重点实验室,西安 710054

收稿日期:2015-04-28 出版日期:2015-10-28 发布日期:2021-09-14
通讯作者: 谢磊(1982-),男,博士,副教授,主要从事先进聚合物基复合材料、先进制造技术研究。
作者简介:刘洪波(1990-),男,硕士,主要从事聚合物基复合材料焊接与装配技术研究。
基金资助:
国家自然科学基金项目(51405519)

EXPERIMENTAL INVESTIGATION OF THE RESISTANCE WELDING FOR THERMOSETTING-MATRIX COMPOSITES

LIU Hong-bo, XIE Lei^*, DUAN Yu-gang, LI Di-chen

State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710054, China

Received:2015-04-28 Online:2015-10-28 Published:2021-09-14

摘要/Abstract

摘要： 采用碳纤维增强环氧树脂复合材料层压板与热塑性粘接剂共固化工艺,制备层压板焊接面覆有粘接剂的复合材料结构试件,利用粘接剂作为焊接介质对热固性环氧树脂基碳纤维复合材料结构试件进行电阻焊接。粘接剂与环氧树脂基体界面形成了半互穿网络聚合物(S-IPN)结构,有利于提升粘接剂与环氧树脂基体界面粘接性能,提高接头强度。对焊接试件的接头力学性能表征表明:采用AX8900粘接剂作为焊接介质的试件接头强度最高;单搭接剪切强度(LSS)可以达到7.35MP;编织碳纤维和金属网作为加热电阻可以使接头强度较单向碳纤维加热电阻分别提高60%和73%;编织碳纤维加热电阻焊接的AX8900试件的平均层间断裂韧性可达1880J/m²。根据编织碳纤维加热电阻焊接AX8900试件的LSS建立了基于焊接时间和功率密度的焊接工艺窗口。

关键词: 热固性树脂基复合材料, 电阻焊接, 热塑性粘接剂, 焊接强度

Abstract: A experimental investigation of the resistance welding of carbon fibre reinforced epoxy laminate is presented. The bonding surface of the laminate is coated with a layer of binder as welding medium and the interpenetration polymer network was created between epoxy and binder during curing process. The temperature distribution of the welding interface was measured and compared to those simulated by finite element model, the statistical distribution of the resistance of the unidirection and fabric heating elements was characterized, and the effects of the temperature on the heating element resistance were evaluated. Maximum lap shear strengths of 7.35MPa was obtained using unidirectional heating element for the AX8900 bindered epoxy/CF laminate. Three failure mechanisms, leading to different values of lap shear strength, were identified including tearing of heating element, cohesive failure of the binders and interfacial failure. A comparison between unidirectional, fabric and mental mesh heating element, in terms of lap shear strength was performed. The results show that fabric and mental mesh heating element can significantly improve the lap shear strength. A processing window based on the parameters, i.e. power level and welding time, was crated.

Key words: thermosetting composites, resistance welding, thermoplastic binder, welding strength

中图分类号:

TB332
V261.3

刘洪波, 谢磊, 段玉岗, 李涤尘. 热固性树脂基复合材料结构电阻焊接研究[J]. 复合材料科学与工程, 2015, 0(10): 58-63.

LIU Hong-bo, XIE Lei, DUAN Yu-gang, LI Di-chen. EXPERIMENTAL INVESTIGATION OF THE RESISTANCE WELDING FOR THERMOSETTING-MATRIX COMPOSITES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(10): 58-63.

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