三维针刺复合材料参数化建模及力学性能仿真  

Parametric modeling and mechanical properties simulation of three-dimensional needling composites

作　　者：陈国耀 黄丰 杨振宇[1] 卢子兴[1] 王浩然 CHEN Guoyao;HUANG Feng;YANG Zhenyu;LU Zixing;WANG Haoran(School of Aeronautic Science and Engineering,Beihang University,Beijing 100083,China;The 41st Institute of the Sixth Academy of China Aerospace Science&Industry Corp.,Huhhot 010010,China)

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100083 [2]中国航天科工集团第六研究院四十一所,呼和浩特010010

出　　处：《复合材料学报》2022年第9期4459-4470,共12页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(11972057,11972058);国家科技重大专项(2017-VII-0003-0096)。

摘　　要：提出了一套三维针刺复合材料建模方法,并应用于针刺碳/酚醛复合材料的力学性能仿真分析。首先基于虚拟纤维技术,采用商用有限元软件ABAQUS,实现了叠层材料针刺工艺过程的数值模拟,获得了针刺区域附近的纤维丝在针刺过程中的变形规律,据此建立了受针刺影响区域内的纤维取向、损伤百分比与针刺工艺参数之间的关系;将这一关系引入到针刺复合材料代表性体积单元(RVE)模型中,较准确地体现真实材料中针刺区结构特征。利用此模型对材料的弹性性能、强度进行预测,结果与实验值吻合良好,验证了模型的有效性;在此基础上,进一步讨论了针刺密度、针刺深度等参数对复合材料力学性能的影响规律。本文的研究结果对针刺复合材料的力学分析与优化设计具有一定的指导意义。The mechanical properties of needling carbon/phenolic composites were simulated and described along with a general finite element modeling(FEM) approach for 3D needling composites. First, the numerical simulation of the needling process of laminated materials was accomplished using virtual fiber technology with the commercial FEM program ABAQUS, and the deformation of the fiber near the needling area in the formation process was simulated. Based on this, a correlation between fiber orientation, damage rate, and needling parameters was found in the needling process-affected area. This relationship was then introduced into the representative volume element(RVE) of needling composites, which can accurately reflect the structural characteristics of real materials.This model was used to predict the stiffness and strength of materials, and the results are in good agreement with the experimental values, which verifies the validity of the model. Based on this, the effects of needling parameters,such as needling density and needing depth, on mechanical properties of composites were discussed. The results of this study are expected to contribute to the mechanical analysis and optimal design of needling composites.

关 键 词：三维针刺复合材料 有限元 虚拟纤维 弹性性能 强度 

分 类 号：TB330.1[一般工业技术—材料科学与工程]