超声波焊接文摘I：局部加热和焊接
Digest Ultrasonic Welding I: Localized Heating and Fuse Bonding
摘要：
本文报道了一种新的见解超声波焊接过程的原理。超声焊接过程的物理过程被认为是剪切带形成的逆过程。超声波焊接和剪切带的形成都涉及由于局部塑性形变引起的温度升高。在剪切带形成期间，热量将导致材料的损坏，例如，材料内部裂纹的产生。但超声波焊接过程中产生的热量会将两个零件连接起来或修复材料内部的裂纹。超声焊接过程中使用的能量导向器作为局部塑性形变的触发器。从数学上分析了超声波焊接过程中产生的热量与电流产生的热量相似。
英文摘要：
This paper reports a new insight on the principle of ultrasonic welding process. Physics of ultrasonic welding process is considered to be an inverse process of shear band formation. Both ultrasonic welding and shear band formation involve temperature rising due to localized plastic deformation. During shear band formation, heat will lead to damage of materials, e.g., initiation of cracks inside materials. But heat generated in ultrasonic welding process will bond two pieces or repair the cracks inside materials. Energy directors used in ultrasonic welding process act as a trigger of localized plastic deformation. Mathematically, We found out that heating generation during ultrasonic welding process is similar to heating generation by electric current.
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