三维四向碳/碳复合材料预制体压实致密多影响因素分析与研究  

Analysis and study on multiple factors affecting compaction of 3D four-directional C/C composite preform

作　　者：任洪庆 董九志[1,2] 梅宝龙 陈云军[3] 蒋秀明[1,2] REN Hongqing;DONG Jiuzhi;MEI Baolong;CHEN Yunjun;JIANG Xiuming(School of Mechanical Engineering,Tiangong University,Tianjin 300387,China;Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology,Tiangong University,Tianjin 300387,China;School of Electrical Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学机械工程学院,天津300387 [2]天津工业大学天津市现代化机电装备技术重点实验室,天津300387 [3]天津工业大学电气工程与自动化学院,天津300387

出　　处：《复合材料科学与工程》2023年第11期84-89,128,共7页Composites Science and Engineering

基　　金：天津市科技支撑重点计划项目(15ZSZDGX00840)。

摘　　要：为提高预制体纤维体积含量,基于三维四向碳/碳复合材料预制体成型工艺,设计正交试验分析每循环压实次数、保压时间和助剂含量对纤维体积含量的影响规律,结果显示助剂含量对最终纤维体积含量影响最大,每循环压实次数影响次之,保压时间影响最小;纤维体积含量随助剂含量的增加先增大后降低,随保压时间及每循环压实次数的增加而增大。通过设计BBD响应面优化试验,建立相应纤维体积含量数学模型并验证了模型的可靠性,进而优化工艺参数并进行了试验验证。结果表明:每循环压实3次,保压7 s,两束含助剂纤维为最优压实工艺参数。在最优参数下编织的预制体最终纤维体积含量与预测值仅相差0.24%,与原工艺参数相比提高4.54%。最后通过显微观测发现最优参数下所编织的预制体更加密实。In order to improve the fiber volume fraction of the preform,based on the 3D four-direction C/C preform compaction process,the orthogonal experiment was designed to analyze the influence of the compaction times per cycle,pressure duration and content of additives on the fiber volume fraction.Results show that the content of additives has the greatest impact on the final fiber volume fraction,followed by the compaction times per cycle and the impact of pressure duration is the smallest.The fiber volume fraction first increases and then decreases with the increase of content of additives,with the increase of pressure duration and compaction times per cycle.The BBD response surface optimization experiment was designed to establish the corresponding fiber volume fraction mathematical model and verify the reliability of the model,and the process parameters were optimized and verified by experiments.The results show that each cycle is compacted three times,pressure duration is 7 s,two bundles of fibers with additives are the optimal parameters.The final fiber volume fraction of the preform woven under the optimal parameters is only 0.24%different from the predicted value,which is at least 4.54%higher than that of the original process parameters.Finally,it can be seen from the microscopic observation that the preform woven under the optimal parameters is more dense.

关 键 词：预制体 纤维体积含量 多因素分析 工艺优化 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]