L’estimation de la puissance de chauffage d’un procédé de moulage par compression du composite thermoplastique renforcé par des fibres de carbone

Abstract

Compression molding of the thermoplastic composite is a technique widely used by the aviation industry due to the short manufacturing time that allows industries to increase production and minimize manufacturing costs. To help industries to achieve a better economic profile, we studied in this work of research the influence of the thickness, the volume and the width of the parts on the heating power using the COMSOL multi-physics software based on the finite element method. The 4 pieces studied were made of a composite CF/PEEK manufactured by the compression molding process to produce a plate, a T-shaped piece and an L-shaped piece all pre-impregnated with short fiber strands of a random orientation (ROS) and a concave shaped piece of unidirectional continuous fibers (UD). The working methodology is to simulate the models of the parts by increasing their thickness, there volume and their width independently assuming that the duration of heating remained constant. If the heating cycle of the parts changed, then we increased the power of heating. But when the heating cycle of the parts did not change, the increase in the geometry of the part had no effect therefor the heating power remained unaffected. The simulation results showed that the thickness had no effect on the heating power up to an increase by a factor up to 5 times more for the L-shaped part, the Tshaped part and the plate. The width of the parts had no effect on the heating and cooling cycle as long as the dimensions of the mold were not modified. For the 4 pieces studied, the evolution of the heating power according to the thickness of the parts is expressed by a second order polynomial equation.

Date	19 Jun 2018
Original language	French
Awarding Institution	École de technologie supérieure
Supervisor	Anh Dung Ngô (Supervisor)