利用固化动力学模型对20 mm厚度和3mm厚度的ZT7H/5429碳纤维复合材料层合板进行了固化模拟,在固化过程中,20 mm厚度平板出现了温度峰值,中心温度与表面温度差不超过6℃,3mm平板温度分布均匀,温度历程与热压罐工艺温度基本一致.利用简化的温度场和等效热膨胀系数对609和90°拐角的Ⅴ型基准试件进行了固化变形模拟,并进行了Ⅴ型基准试件的固化试验.60°和90°拐角试件的固化回弹角的模拟值分别为1.58°和1.18°,试验测得的回弹角的平均值分别为1.59°和1.11°.对Ⅴ型复合材料蒙皮构件进行了固化变形模拟,并得到了补偿过的工装型面,在该工装上成型的试件与设计形状基本一致.
Cure kinetics model was used to simulate the cure process of 20 mm/3 mm thick composite plates.A peak on temperature curves was observed during the cure process of 20 mm plate.The temperature difference between interior and surface was less than 6 ℃,while for 3 rnm plate,it kept the same with autoclave temperature and distributed uniformly.Cure-induced deformations of 60°/90° Ⅴ profile specimens were simulated by applying simplified temperature field and equivalent coefficients of thermal expansion,and 6 Ⅴ profile specimens (3 samples per type) were cured.The simulation spring-in angles of 60° and 90° specimens were 1.58 and 1.18° respectively which well agreed with the experiment (1.59° and 1.11°).Based on the simulation method,the surface of deformation-compensating tool for a composite skin was acquired.The application of the deformation-compensating tool increased the manufacturing accuracy greatly.
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