热固性树脂基复合材料固化变形研究进展

热固性树脂基复合材料结构在热压罐成型过程中,由于模具的约束作用,会导致工件内部残余应力的产生,进而引起工件回弹变形和翘曲变形.对影响残余应力和变形产生的各种因素进行了综述及分析,这些因素包括热膨胀、固化收缩、铺层方式、固化温度、模具热膨胀、气孔含量、热梯度分布、纤维含量梯度分布、降温速率、固化时间、纤维含量、模具表面处理、模具角半径和模具热传导性能.

Progress of Study on Curing Induced Shape Distortion for Resin Matrix Thermosetting Composites

The residual stresses that develop in fiber-reinforced composite structures during autoclave processing while the laminate is confined to the process tool often lead to dimensional changes of the workpiece such as rebound and warpage.A review over factors to affect shape distortions and residual stresses is presented.The factors studied include thermal expansion,cure shrinkage,laminate lay up,cure temperature,mould thermal expansion,void content,thermal gradients,fibre content gradients,cool-down rate,cure time,fibre content,mould surface treatment,mould corner radius and mould thermal conductivity.