Research on 3D thermal response of glass fiber epoxy based on UMATHT subroutine

doi:10.19936/j.cnki.2096-8000.20220128.004

Abstract

Abstract: Based on the UMATHT and USDFLD subroutines, a thermal response model of composite materials considering material anisotropic heat conduction, matrix pyrolysis, and pyrolysis product diffusion was established, and the thermal response law of glass fiber/epoxy resin in a single-sided heat flow environment and the effect of flame retardants are studied. The results show that the temperature history predicted by the thermal response model is in good agreement with the experimental measured value, which can effectively predict the thermal response of glass fiber/epoxy resin. Under the same working conditions, the flame-retardant modified glass fiber/epoxy resin has a lower temperature rise rate compared with the unmodified material. The results show that the flame retardant can promote the thermal decomposition reaction and rapidly reduce the density of the surface of the material to form coke, and the thermal decomposition rate and thermal decomposition rate are significantly improved. The phenomenon that the intense pyrolysis zone gradually moves to the adiabatic surface with time is more obvious, so as to achieve the flame retardant effect of endothermic retarding surface ignition.

Key words: UMATHT, glass fiber/epoxy resin, thermal response, thermal decomposition, finite element, composites

CLC Number:

TB332

FENG Zhen-yu, HAN Xue-fei, YUAN Hao-ran, LI Han, XIE Jiang. Research on 3D thermal response of glass fiber epoxy based on UMATHT subroutine[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(1): 29-35.

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