STUDY ON CURING BEHAVIOR OF X850 COMPOSITE MATERIAL DURING AUTOCLAVE PROCESS

Abstract

Abstract: The exothermic effects of the resin curing at 100 ℃, 110 ℃, 120 ℃ and 130 ℃ were studied by means of constant temperature DSC experiments. The curing behavior of the resin was nonlinear fitted based on the autocatalytic reaction model. The specific form of curing kinetics equation is as follows: dα/dt=7.76×10⁸exp(-10352.8/T)α^0.5928(1-α)^1.4628. With the help of secondary development technology, the curing kinetics equation was embedded into FLUENT software to simulate X850 laminates curing process. Comparison between experiment and simulation results show that the established curing kinetic model can accurately reflect the exothermic effect of resin during the autoclave curing process. The exothermic effect of resin curing is the main reason for the phenomenon of "temperature overshoot" in the actual production process, and with the increase of the laminate thickness, the exothermic effect of resin is intensified. It is difficult to transfer the heat from inside to outside effectively. In the actual preparation of parts, heat dissipation should be done well.

Key words: composite material, curing kinetics, DSC, numerical simulation

CLC Number:

TB332

WANG Min, LUAN Ying-wei, XU Peng, GAO Long-fei, WANG Shi-jie, LI Zhen-you. STUDY ON CURING BEHAVIOR OF X850 COMPOSITE MATERIAL DURING AUTOCLAVE PROCESS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(2): 32-37.

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