Abstract
The process of ultrasonic welding is widely used in the industry. Nevertheless, its numerical modelling, essential for the aeronautic industry, is quite difficult because of the two time scales present in the process. After explaining principle of the welding, a method of time homogenization is presented in order to write down three different thermal and mechanical systems of equations. Since one of those problems implies moving free surface, a numerical tool using the level-set method was used to solve them.
Highlights
This work aims at modeling an original welding process for composite material with thermoplastic matrix
The two plates are positioned in order to cover each other on the width of the energy directors
The main problem for modelling such a process comes from the existence of two time scales
Summary
This work aims at modeling an original welding process for composite material with thermoplastic matrix. Triangular bulges, called “energy directors” are molded with matrix only, on a width of two centimeters on the border of one of the plate to be welded. The process consists in applying an ultrasonic (20 KHz) sinusoidal compression stress between the two plates as shown in figure 1. The main problem for modelling such a process comes from the existence of two time scales. Simulating each ultrasonic cycle would induce huge calculation times since the whole process is performed over thousands of cycles. Such a drawback can be overcome by the timehomogenization technique
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
