基于UMATHT子程序的玻璃纤维/乙烯基酯热响应数值模拟

doi:10.11896/cldb.19100129

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Abstract Aiming at the thermal response of glass fiber/vinyl ester resin composites in fire environment, the thermal response model is implemented with the UMATHT and USDFLD subroutines to conduct finite element calculation and analysis, which considers heat conduction, matrix pyrolysis and gas diffusion. The results show that the thermal response finite element model of composites can reasonably forecast the thermal response of glass fiber/vinyl ester resin laminates under one-sided heat flux. Under the heat flux of 50 kW/m², the surface temperature and rear temperature of the material at the end of heating are 615.89 ℃ and 412.55 ℃ respectively. With the increase of heating time, the temperature field of mate-rials continues rising. The distribution of material temperature in the thickness direction gradually changes from nonlinear to linear. With the increment of the depth, the longer it takes for the material to complete the pyrolysis reaction, the lower the peak of thermal decomposition rate of the material is, the later the peak of thermal decomposition rate is, and the slower the pyrolysis reaction is. At the same temperature, with the decrease of the depth, the lower the thermal decomposition rate of the material which in the pyrolysis state is, the higher the peak of the thermal decomposition rate is, and the higher the temperature which the material reaches the peak of thermal decomposition rate is.

Key words： thermal response glass fiber/vinyl ester thermal decomposition UMATHT subroutine finite element

Published: 28 January 2021

CLC number:

TB332

About author:: Zhenyu Feng, professor of Civil Aviation University of China, master’s supervisor and vice director of Civil Aircraft Airworthiness Certification Technology and Management Research Center. His research concentrate on the fields of aircraft airworthiness certification technology, aircraft structural strength, etc. He obtained his Ph.D. degree in solid mechanics from Northwestern Polytechnical University, in 1995. In recent years, he has presided over and participated in a number of major sub-projects of large aircraft and China civil aviation administration science and technology projects.
Baoxin Fan, master degree student of Civil Aviation University of China, focusing on the research of thermal response of composite materials.

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	FENG Zhenyu
	FAN Baoxin
	WANG Nasidan
	HAN Xuefei
	LI Han
	WU Jingtao

Cite this article:

FENG Zhenyu,FAN Baoxin,WANG Nasidan, et al. Numerical Simulation of Thermal Response of Glass Fiber/Vinyl Ester Based on UMATHT Subroutine[J]. Materials Reports, 2021, 35(2): 2191-2198.

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http://www.mater-rep.com/EN/10.11896/cldb.19100129 OR http://www.mater-rep.com/EN/Y2021/V35/I2/2191

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