The possibilities and challenges of using fiber optical sensors to monitor the laser-assisted joining of metal–polymer joints have been described in this article. Fundamental investigation proves the basic suitability of the measuring method for this application and studies the effect of essential influencing variables of the joining process—e.g., the clamping force—on the resulting sensor signals. In addition, the strain state (because of the process temperature and shrinkage of the polymer) of the parts to be joined can be traced as a function of the joining partners, the process parameters, and the material thicknesses. It is shown that the fiber optical method is suitable for process monitoring directly in the joining zone of metal–polymer hybrids and providing a tool for detailed strain measurements in the joint zone during subsequent component testing.

中文翻译：

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使用集成光纤传感器监测激光辅助金属-聚合物连接的可行性研究

本文描述了使用光纤传感器监控金属-聚合物接头的激光辅助连接的可能性和挑战。基础研究证明了该测量方法对于该应用的基本适用性，并研究了连接过程中的重要影响变量（例如，夹紧力）对所得传感器信号的影响。此外，可以根据连接伙伴，工艺参数和材料厚度来跟踪待连接零件的应变状态（由于加工温度和聚合物的收缩）。