Abstract
The characteristics of glass-fiber reinforced plastic are influenced greatly by the type of matrix, the type or shape of the fiber and the method of reinforcement. For instance, the future of glass-fiber reinforced thermoplastic (GFRTP) as a practical material is noteworthy due to it's wide range of elastic deformation and its strength, which latter is as great (weight for weight) as that of metal. As GFRTP has a wide application, an effective welding method is sought, for use along with conventional mechanical fastening and bonding methods. The basic research of the author on stampable sheet has established that the ultrasonic welding method is effective for GFRTP welding [1]. This paper reports on the possibilities of ultrasonic welding, on the characteristics of the joint strength and on the workability of the welded products. A comparison has been made between two kinds of fiber-reinforced plastic, produced by different manufacturing processes [2].
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