摘要
为了真实反映整体穿刺碳纤维毡的压缩特性,构建了穿刺碳纤维毡压实模型,采用有限元方法预测压缩载荷与压实高度的非线性映射关系。首先,考虑碳纤维毡内部纤维分布的随机性,提出了碳纤维毡微观结构参数化建模方法,并定义了纤维取向、方位角和长度等几何参数,在ABAQUS平台上利用Python程序设计语言构建了碳纤维毡细观几何模型。其次,采用Abaqus/Explicit算法对穿刺碳纤维毡压实过程进行有限元仿真,分析了预制体在压实过程中不同阶段的结构变化。最后,通过压实试验获得了预制体压实高度与压缩载荷之间的曲线关系。试验结果表明,数值仿真的预制体结构形态变化和压缩载荷–位移曲线关系均与试验结果吻合较好,两者之间最大误差小于5.5%,验证了穿刺碳纤维毡压实模型的正确性。
In order to accurately reflect the compression characteristics of the integral pierced carbon fiber felt,a compaction model for the pierced carbon fiber felt was constructed,employing finite element methods to predict the nonlinear mapping relationship between the compression load and compaction height.Initially,considering the randomness of the internal fiber distribution in the carbon fiber felt,a parametric modeling method for the microstructure of the carbon fiber felt was proposed,defining parameters such as fiber orientation,azimuth angle,and length.On the ABAQUS platform,a microscale geometric model of the carbon fiber felt was constructed using the Python programming language.Subsequently,the compaction process of the pierced carbon fiber felt was simulated using the Abaqus/Explicit algorithm,analyzing the structural changes of the preform at different stages of the compaction process.Finally,the relationship between the compaction height and the compression load of the preform was obtained through compaction experiments.The experimental results indicate that the structural morphology variations of the preform and the compression load–displacement curve relationship predicted by the numerical simulation are in good agreement with the experimental results,with the maximum error between the two being less than 5.5%,thereby validating the correctness of the compaction model of the pierced carbon fiber felt.
作者
景喆
董九志
梅宝龙
李锐
陈云军
JING Zhe;DONG Jiuzhi;MEI Baolong;LI Rui;CHEN Yunjun(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)
出处
《航空制造技术》
北大核心
2025年第21期186-192,共7页
Aeronautical Manufacturing Technology
关键词
整体穿刺预制体
碳纤维毡
有限元模型
压实
纤维体积分数
Integral pierced preform
Carbon fiber felt
Finite element model
Compaction
Fiber volume fraction
