U型复合材料结构件热压罐固化变形及补偿技术应用研究

Study on the Cure-Induced Deformation and Application of Compensation Technology of U Shaped Composite Structure in Autoclave Process

以复合材料U型构件为研究对象,采用数值模拟的方法对U型件进行热压罐温度场的模拟,模拟出在不同时间段工装和工件的温度分布情况,模拟工件在工装传热和变形影响下的内部传热、固化度、最终变形情况和残余应力水平等。根据模拟结果,优化热压罐固化工艺参数,从而改善固化热变形问题,根据分析结果制定补偿方案并实施验证,同时优化工装结构形式,采用工装型面补偿技术对零件固化变形进行预补偿。结果表明,补偿后零件变形后的外形与理论几何外形相差1.37mm,验证了补偿技术的可行性。工装型面补偿技术可以有效提高复合材料结构件的制造精度。

The U shaped structure of composite material was studied. Simulation technology was used for the temperature distribution of typical U shape part in autoclave toolings, and the temperature distribution of the tool and part in different periods. Under the influence of the heat transmission and distortion of tool, internal heat transmission, curing degree, ultimately distortion and residual stress of composite part were simulated. According to the results of the simulation, we optimize the structure of tool as well as the curing parameter, establish the compensating scheme for tool, thereby improving issues of part, including the solidification and thermal deformation. Based on analysis results, the compensating scheme had been established and validated. Result shows that the deformation between compensation and the theory shape is 1.37 mm. The feasibility of compensation is verified. Profile compensation can be used for improving the manufacturing precision of composite component.