基于UMATHT子程序的玻璃纤维环氧树脂三维热响应研究

doi:10.19936/j.cnki.2096-8000.20220128.004

复合材料科学与工程 ›› 2022, Vol. 0 ›› Issue (1): 29-35.DOI: 10.19936/j.cnki.2096-8000.20220128.004

基于UMATHT子程序的玻璃纤维环氧树脂三维热响应研究

冯振宇^1,2*, 韩雪飞^1,2*, 袁浩然^1,2*, 李翰^1,2*, 解江^1,2*

1.中国民航大学安全科学与工程学院,天津300300;
2.民航航空器适航审定技术重点实验室,天津300300

收稿日期:2021-04-22 出版日期:2022-01-28 发布日期:2022-02-10
作者简介:冯振宇(1966-),男,博士,教授,主要从事飞行器结构力学及强度方面的研究,mhfzy@163.com。

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

FENG Zhen-yu^1,2, HAN Xue-fei^1,2, YUAN Hao-ran^1,2, LI Han^1,2, XIE Jiang^1,2

1. School of Safety Science and Engineering, Civil Aviation University of China, Tianjin 300300, China;
2. Civil Aviation Aircraft Airworthiness Certification Technology Key Laboratory, Tianjin 300300, China

Received:2021-04-22 Online:2022-01-28 Published:2022-02-10

摘要/Abstract

摘要： 基于UMATHT与USDFLD子程序构建了一个考虑复合材料的各向异性热传导、基体热解、热解产物扩散的复合材料热响应模型,研究了单侧热流环境下玻璃纤维/环氧树脂的热响应规律及在阻燃剂条件下的热反应速率。结果表明:热响应模型预测的温度变化历程和实验的测量值吻合较好,可有效预测玻璃纤维/环氧树脂的温度变化。在相同工况条件下,阻燃改性后的玻璃纤维/环氧树脂相比未改性材料,其温升速率有所降低,阻燃剂促进了热分解反应,使材料表面的密度迅速减小,形成焦炭,热分解率与热分解速率显著提高,剧烈热解区随时间逐渐向绝热面推移的现象更显著,从而达到吸收热量、推迟表面着火的阻燃效果。

关键词: UMATHT, 玻璃纤维/环氧树脂, 热响应, 热分解, 有限元, 复合材料

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

中图分类号:

TB332

冯振宇, 韩雪飞, 袁浩然, 李翰, 解江. 基于UMATHT子程序的玻璃纤维环氧树脂三维热响应研究[J]. 复合材料科学与工程, 2022, 0(1): 29-35.

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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基于UMATHT子程序的玻璃纤维环氧树脂三维热响应研究

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

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