基于黏弹性本构模型的树脂基复合材料构件固化变形与残余应力仿真分析

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Simulation analysis of curing deformation and residual stress in polymer-matrix composite components based ona viscoelastic constitutive model

LI Jianjun 1* ，WANG Qiang'， JIANG Peng²，NING Li 2 ， YANG Ying²（1.Institute of Jiangxi Aeronautics，Nanchang 33O006；2. Nanchang University，Nanchang 330031）

Abstract：The spring-back deformationof L-shaped compositecomponents after curing was investigated.Acomparison betweenlinearelasticandviscoelasticonstitutive modelswasconducted，andthegeneralizedMaxwellviscoelasticodel， with higher predictiveaccuracy，wasselectedtoestablishathree-dimensional simulation frameworkforcuringdeformation andresidual stress.Sequentiallycoupled thermo-chemical，thermo-mechanical，and chemical shrinkagestrainanalyses were performed in ABAQUS using user-defined subroutines.The model accuracy was validated through comparison with experimentalresults reported intheliterature.Parametric studies conducted after the gelpointrevealedthatappropriately increasing the heating and cooling rates can efectivelyreduce spring-back deformation and shorten the overallcuring duration，whereas the efects of dwell temperature and dwell time on deformation are relatively weak.

Keywords：L-shaped composite components; curing deformation; finite element analysis; residual stress

1引言

先进热固性树脂基复合材料因具有较高的比强度和比刚度，被广泛应用于航空航天、汽车以及可再生能源等领域[1-2]。（剩余9539字）