复合材料C/L型结构固化变形的影响因素分析

Effect Factors on Curing-Induced Distortion of C/L Composite Structures in Manufacturing Processing

固化变形是影响复合材料零件结构成型几何精度的重要因素。产生固化变形的原因一般可以分为内因和外因:内因主要与材料属性和结构设计参数有关;外因主要与固化工艺和模具有关。固化时这些因素共同作用,在复合材料结构内部产生残余应力,脱模时导致构件发生变形。通过对已有试验结果的研究,总结了不同因素对复合材料结构固化变形的影响,为固化变形的工程预测和控制提供直观的数据参考。

Curing-induced distortion in manufacturing processing,which is related to many different effect factors,has important influence on the dimensional accuracy of composite parts.The different effect factors can be classified as intrinsic or extrinsic factors.For intrinsic factors,these are with respect to material properties,stacking sequence of plies and geometry of structures,whereas extrinsic factors are generally related to the art of curing process and tooling properties.These factors could bring structures the process-induced residual stresses that will lead to the distortion after parts detooling.Through observing the current research results,the effects of these different factors on curing-induced distortion are concluded,then we can use these conclusions as the basis to predict and control the distortion of composite parts.