Joining of carbon fiber and aluminum using ultrasonic additive manufacturing (UAM)
Joining of carbon fiber and aluminum using ultrasonic additive manufacturing (UAM)
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DOI：
10.1016/j.compstruct.2018.10.004
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发表时间：
2019-01-15
影响因子：
6.3
通讯作者：
Dapino, Marcelo J.
中科院分区：
文献类型：
--
作者：
Guo, Hongqi;Gingerich, M. Bryant;Dapino, Marcelo J.
碳纤维增强聚合物（CFRP）复合材料与铝合金（AA）的连接方法多种多样，强度从13 MPa到112 MPa不等。介绍了一种利用超声增材制造技术（UAM）连接碳纤维增强复合材料与金属的新方法。虽然UAM是一种金属3D打印工艺，但它在这里被应用于生产连续的CF-AA过渡接头，这种接头可以在CF和AA成分之间具有均匀的厚度。连接强度通过在AA矩阵内的CF环的机械联锁来实现；拉伸试验表明，UAM CFRP-AA接头的强度达到129.5 MPa。从这些接头延伸出来的干CF织物可以铺成碳纤维增强塑料（CFRP）部件，而AA可以使用传统的金属焊接技术焊接到金属结构上，因此它们被称为“过渡接头”。这种方法可以将碳纤维增强塑料部件整合到车辆结构中，而无需修改现有的金属焊接基础设施。确定了两种失效模式，CF拖曳失效和AA失效。结果表明，通过调整内嵌CF与AA矩阵的比值，可以实现节点强度最大化或耗能最大化的破坏模式设计。
Various methods have been reported to join carbon fiber reinforced polymer (CFRP) composites with aluminum alloy (AA), with strengths ranging from 13 MPa to 112 MPa. This paper presents a new method for joining carbon fiber reinforced composites and metals using ultrasonic additive manufacturing (UAM). Although UAM is a metal 3D printing process, it is applied here to produce continuous CF-AA transition joints that can have uniform thickness across the CF and AA constituents. Joint strength is achieved by mechanical interlocking of CF loops within the AA matrix; tensile tests demonstrate that UAM CFRP-AA joints reach strengths of 129.5 MPa. The dry CF fabric extending from these joints can be laid up and cured into a CFRP part, whereas the AA can be welded to metal structures using traditional metal welding techniques - hence their designation as "transition joints." This approach enables the incorporation of CFRP parts into vehicle structures without requiring modifications to existing metal welding infrastructure. Two failure modes, CF tow failure and AA failure, have been identified. It is shown that the joint failure mode can be designed for maximum strength or maximum energy dissipation by adjusting the ratio of embedded CF to AA matrix.