Abstract: The temperature fields during liquid infiltration extrusion of composites are simulated with the finite element method, the seepage fields of liquid metal are simulated with the finite difference method. Temperature fields and seepage fields are coupled and calculated, then the temperature variation curves, infiltration front process curves and velocity variation curves along with time are got by FORTRAN program and ANSYS software. The results indicate that the fiber radius, infiltration pressure, liquid metal viscosity coefficient and the volume fraction of perform affect the infiltration velocity of liquid metal and the infiltration process. The ideal temperature distribution in filtrated region may be got through selecting the appropriate process parameters. The analysis for the simulation results provide theoretic basis for the rational choice of the process parameters.

Key words: Coupled analysis, Darcy law, Liquid infiltration extrusion, Metal matrix composites