FEA of Temperature Profile in the Ultrasonic Welded Joint

Abstract

In ultrasonic welding of fiber reinforced thermoplastic, heat is generated by means of interfacial friction at the interface to be bonded and internal friction of the polymer chains. A finite element model, using ANSYS software, was developed to calculate the transient temperature profile in glass fiber reinforced polypropylene joint in the transverse direction during ultrasonic welding. The results showed that the temperature in the joint increased with increasing weld time. With higher weld pressure, the temperature of molten point of polyprolylene can be reached within a shorter weld time. The weld map obtained from the finite model was in agreement with the results obtained experimentally.