Hybrid welding of carbon-fiber reinforced epoxy based composites
Hybrid welding of carbon-fiber reinforced epoxy based composites
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DOI：
10.1016/j.compositesa.2017.10.021
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发表时间：
2018-01-01
影响因子：
8.7
通讯作者：
Maffezzoli, Alfonso
中科院分区：
文献类型：
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作者：
Lionetto, Francesca;Morilas, Maria Nicolas;Maffezzoli, Alfonso
在这项研究中提出的用于连接热固性基体复合材料（TSC）的方法是基于使用低熔点共固化的热塑性薄膜，添加作为复合材料层压板的堆叠顺序中的最后一层。在固化过程中，热塑性膜部分地渗透到热固性复合材料的第一层中，导致宏观机械互锁作为热塑性膜和下面的复合材料之间的主要连接机制。固化后，具有热塑性改性表面的热固性复合材料接头可以通过焊接组装。TSC-TSC接头的焊接通过超声波焊接和感应焊接进行。焊接强度的横截面和破坏表面的形态特征和机械测试进行了研究。还分析了热塑性薄膜厚度对焊接过程及其结果的影响。感应焊接和超声波焊接都能产生高质量的焊接接头。发现所使用的焊接工艺以及热塑性膜的初始厚度对焊接线的最终厚度和失效位置具有显著影响。发现较厚的热塑性膜使焊接过程容易。(C)2017爱思唯尔有限公司版权所有
The approach for joining thermosetting matrix composites (TSCs) proposed in this study is based on the use of a low melting co-cured thermoplastic film, added as a last ply in the stacking sequence of the composite laminate. During curing, the thermoplastic film partially penetrates in the first layer of the thermosetting composite, leading to macro-mechanical interlocking as the main connection mechanism between the thermoplastic film and the underlying composite. After curing, the thermosetting composite joints with the thermoplastic modified surface can be assembled by welding. Welding of the TSC-TSC joints is performed by ultrasonic and induction welding. The weld strength is investigated by morphological characterization of cross sections and failure surfaces and by mechanical testing. The effect of the thermoplastic film thickness on the welding process and on its outcome is also analyzed. Both induction and ultrasonic welding mostly result in good-quality welded joints. The welding process used as well as the initial thickness of the thermoplastic film are found to have a significant effect on the final thickness of the weld line and on the location of failure. Thicker thermoplastic films are found to ease the welding processes. (C) 2017 Elsevier Ltd. All rights reserved.