Optimization method for molding mold and filling process of resin transfer molding (rtm) to form fiber fabric reinforced resin-based composite parts

An optimization method for molding mold and filling process of resin transfer molding (RTM) to form fiber fabric reinforced resin-based composite parts, comprising:

• (S1) using a model wizard in a simulation platform, choosing Brinkman equations in a fluid flow level set and selecting a Transient state with a phase initialization in a multi-physics preset to complete a selection of the model wizard;
• (S2) setting up a model according to a geometry of the parts by using a Component in a Model Builder window of the simulation platform;
• (S3) creating two empty materials under a node of the Component in the Model Builder window, wherein one of the two empty materials is assigned with a performance parameter of air and designated as an Empty Material 1, and the other one of the two empty materials is assigned with a performance parameter of a resin system and designated as an Empty Material 2;
• (S4) selecting a Porous Material under the Component node and entering values of a porosity εp of a fiber fabric and a permeability k of the fiber fabric in a setting of the porous material;
• (S5) selecting the Brinkman equations under the Component node and choosing a Porous Slip in a Locating Physical Model column of the Brinkman equations;
• (S6) designing a resin system injection port and a resin system discharge port on a surface of the constructed model;
• setting the resin system injection port as an inlet and the resin system discharge port as an outlet respectively, and positioning the inlet and the outlet in a boundary condition column;
• selecting a driving mode as a pressure, and entering a value of the pressure of an RTM molding injection pressure or a vacuum negative pressure;
• (S7) selecting the constructed model and performing a grid division, choosing a Free Triangular mesh as a grid type and clicking on Build All to complete the grid division of the model;
• (S8) in the Model Developer window, clicking on a function key Study 1, then clicking on a sub function key Solver Configuration of the Study 1, then clicking on a sub function key Solution 1 of the Solver Configuration, then clicking on a sub function key Transient Solver 1 Node of the Solution 1;
• setting a stop condition for simulation under the Transient Solver 1 node as a stop expression and inputting the stop expression;
• (S9) running a mold filling program with the resin system of the Empty Material 2 into a molding mold covered with the fiber fabric to simulate the mold filling process;
• and determining a stimulated time of the mold filling with the resin system and a stimulated effect of the mold filling with the resin system according to Darcy's law, obtaining the molding mold structure and the filling process of RTM to form the fiber fabric reinforced resin-based composite part.