Mechanism of curing behavior for CFRP compression molding under thermo-mechanical-chemical multi-field coupling

Curing is a critical process in the compression molding of carbon fiber reinforced polymer (CFRP). It directly bears on quality molded products. Based curing theory resin-based polymers, thermo-mechanical-chemical multi-field coupling model for CFRP form thermal-chemical subprocess, matrix flow-compaction sub-process and residual stress-deformation sets up its data exchange mutual call relationship. Considering thermal physics chemical properties composites change with temperatures, authors introduced viscosity stiffness coefficient took AS4/3501CFRP laminate as an example, carried out simulation through molding, using finite-element software COMSOL. The proposed was proved correct calculation example literature. Further, mechanism revealed detailed analysis evolution temperature, degree, stress strain molding. results show that large internal temperature gradient during laminates main reason materials deformation laminate. Finally, prepared, field monitored by Bragg grating (FBG) transducers. law material consistent finite element results, which demonstrate correctness simulation.