热熔酚醛树脂/玻璃纤维层压板的固化特性及工艺优化

doi:10.11896/cldb.23050095

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Abstract Phenolic resin composite materials are widely used in aerospace and other fields, but there is a large amount of residual stress after curing, which leads to a decrease in the mechanical properties of the materials. In order to reduce residual stress and improve the comprehensive performance of modified phenolic resin/glass fiber (MPF/GF) laminates, a finite element model was established to discuss the heat transfer curing, flow compaction, and stress deformation models in detail, and the curing regime of the composite was adjusted to prepare the composite with excellent mechanical properties. The kinetic equations of the curing reaction of MPF/GF prepreg were established using n-level kinetic model and autocatalytic model, and the physical parameters such as specific heat, viscosity, glass transition temperature (T_g), coefficient of thermal expansion (CTE) and coefficient of chemical shrinkage (CCS) of MPF were investigated in relation to the temperature and degree of curing (α). By calculating the temperature gradient and α, obtain an optimized curing regime using 3D finite element software. Compared with the traditional curing regime, the residual stress of MPF/GF composite material obtained based on the optimized curing regime decreased from 32.10 MPa to 25.98 MPa, a decrease of 19.07%;The glass transition temperature increased from 290.25 ℃ to 304.18 ℃, the glass state energy storage modulus increased from 3.89 GPa to 4.21 GPa, an increase of 8.22%, and the rubber state energy storage modulus increased from 32.36 MPa to 51.57 MPa, an increase of 59.36%.

Key words： phenolic resin residual stress finite element curing regime composite material

Published: 25 August 2024 Online: 2024-09-10

CLC number:

TB332

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	Articles by authors
	CHEN Dongliang
	LEI Zixuan
	XU Li
	CHEN Shuang
	LIU Yuhong
	QIANG Junfeng

Cite this article:

CHEN Dongliang,LEI Zixuan,XU Li, et al. Curing Characteristics and Process Optimization of Hot Melt Phenolic Resin/Glass Fiber Laminate[J]. Materials Reports, 2024, 38(16): 23050095-8.

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http://www.mater-rep.com/EN/10.11896/cldb.23050095 OR http://www.mater-rep.com/EN/Y2024/V38/I16/23050095

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