Fatigue Behavior and Damage Monitoring of Ultrasonic Welded Hybrid Joints
Fatigue Behavior and Damage Monitoring of Ultrasonic Welded Hybrid Joints
复制标题
超声波焊接混合接头的疲劳行为和损伤监测
DOI：
10.1007/978-3-319-48761-8_73
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
D. Eifler
中科院分区：
文献类型：
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作者：
Stefan Huxhold;F. Balle;G. Wagner;D. Eifler
近年来，混合节点的需求，特别是轻金属和CFRP复合材料之间的节点需求急剧增加。超声波金属焊接是一种很有前途的铝合金与碳纤维复合材料（CFRP）连接技术。这些混合接头可以通过热软化和机械替换作为超声剪切振荡的结果的焊接区的聚合物来实现。这允许铝和碳纤维之间的直接接触。由于碳纤维的导电性和实现的金属/纤维接触，可以使用混合接头作为其自身的疲劳损伤传感器，并描述焊接的实际疲劳状态。除了标准实验数据之外，还可以在疲劳测试期间监测电阻率的变化。将介绍和讨论超声焊接铝/CFRP接头的载荷增加和等幅测试。
The need of hybrid joints especially for joints between light metals and CFRP-composites is strongly increased in the last years. Ultrasonic metal welding is one promising technology to join aluminum alloys to carbon fiber reinforced polymers (CFRP). These hybrid joints can be realized by thermal softening and mechanical replacing the polymer out of the welding zone as a result of the ultrasonic shear oscillation. This allows a direct contact between the aluminum and the carbon fibers. Due to the electrical conductivity of the carbon fibers and the realized metal/fiber contact it is possible to use the hybrid joints as their own fatigue damage sensor and to describe the actual fatigue state of the welds. Additionally to standard experimental data, the change in the electrical resistivity can be monitored during the fatigue tests. Load-increase as well as constant amplitude tests of ultrasonically welded aluminum/CFRP-joints will be presented and discussed.