Method for detecting fiber flow state and distribution of SMC (Sheet Molding Compound)

The invention discloses a method for detecting the fiber flow state and distribution of an SMC (Sheet Molding Compound). Unsaturated polyester resin, PE (Polyethylene), polystyrene, ground calcium carbonate powder, a viscosity reducer and zinc stearate are adopted; the curing agent, the magnesium oxide paste and the basalt fiber are mixed and then mixed with the chopped fiber into a whole through extrusion, and in the testing process, high-fluidity unsaturated polyester resin is adopted as a matrix, polystyrene is adopted as a low shrinkage agent, superfine heavy calcium carbonate powder is adopted, methyl acrylate is selected as a viscosity reducer, and TPO and TBPB double-component initiators are selected. Active magnesium oxide and high-purity zinc stearate are used as thickening agents and internal release agents, colored glass fibers or basalt fiber chopped yarns are selected as reinforcing materials, the flow distribution and orientation conditions of the chopped fibers can be effectively and visually s