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首页> 美国卫生研究院文献>Journal of Visualized Experiments : JoVE >Ultrasonic Welding of Thermoplastic Composite Coupons for Mechanical Characterization of Welded Joints through Single Lap Shear Testing
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Ultrasonic Welding of Thermoplastic Composite Coupons for Mechanical Characterization of Welded Joints through Single Lap Shear Testing

机译：通过单搭接剪切试验的热塑性复合材料券的超声焊接以对焊接接头进行机械表征

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摘要

This paper presents a novel straightforward method for ultrasonic welding of thermoplastic-composite coupons in optimum processing conditions. The ultrasonic welding process described in this paper is based on three main pillars. Firstly, flat energy directors are used for preferential heat generation at the joining interface during the welding process. A flat energy director is a neat thermoplastic resin film that is placed between the parts to be joined prior to the welding process and heats up preferentially owing to its lower compressive stiffness relative to the composite substrates. Consequently, flat energy directors provide a simple solution that does not require molding of resin protrusions on the surfaces of the composite substrates, as opposed to ultrasonic welding of unreinforced plastics. Secondly, the process data provided by the ultrasonic welder is used to rapidly define the optimum welding parameters for any thermoplastic composite material combination. Thirdly, displacement control is used in the welding process to ensure consistent quality of the welded joints. According to this method, thermoplastic-composite flat coupons are individually welded in a single lap configuration. Mechanical testing of the welded coupons allows determining the apparent lap shear strength of the joints, which is one of the properties most commonly used to quantify the strength of thermoplastic composite welded joints.
机译：本文提出了一种新颖的直接方法，用于在最佳加工条件下对热塑性复合材料试样进行超声焊接。本文所述的超声波焊接工艺基于三个主要方面。首先，在焊接过程中，扁平能量导向器用于在连接界面处优先产生热量。扁平的能量导向器是一种纯净的热塑性树脂薄膜，它在焊接过程之前放置在要连接的零件之间，并且由于其相对于复合基材的较低的压缩刚度而优先受热。因此，与未增强塑料的超声焊接相反，扁平的能量导向器提供了一种简单的解决方案，该解决方案不需要在复合基板的表面上模制树脂突起。其次，超声焊接机提供的过程数据可用于快速定义任何热塑性复合材料组合的最佳焊接参数。第三，在焊接过程中使用位移控制，以确保焊接接头的质量一致。根据该方法，将热塑性复合材料的扁平试样以单搭接形式单独焊接。焊接试样的机械测试可以确定接头的表观搭接剪切强度，这是最常用于量化热塑性复合焊接接头强度的特性之一。

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