Analysis of Curing Characteristics of Thin Shell Woven Composites With Variable Curvature
Composite structures made of woven composites undergo both physical and chemical changes during the curing process,and will produce deformation after demolding,which significantly impacts the accuracy of the parts.In order to accurately predict the deformation,this paper first establishes a multiscale analysis model for the curing deformation of woven composites parts,and combines the meso-mechanical method to obtain the evolution of mechanical and thermal properties of woven composites during the curing process.Then,the effects of curvature and thickness parameters on the curing characteristics of woven composite parts were further analyzed using the sequential thermo-mechanical coupling analysis method to simulate the thin shell parts of variable curvature and laminates with different curvature.The results showed that woven composite parts with a lower thickness have a lower temperature gradient during curing and a more uniform curing degree.The curvature parameters influence on the curing deformation of woven parts,and the thinner the member thickness,the more significant the effect of curvature on deformation.After the thin shell parts of variable curvature was cured and demolded,the maximum displacement in the warp and weft directions is greater than that in the thickness direction at the same curvature.
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