The Effect of Shear Deformation on Permeability of 2.5D Woven Preform
The Effect of Shear Deformation on Permeability of 2.5D Woven Preform
复制标题
剪切变形对 2.5D 编织预制件磁导率的影响
DOI：
10.3390/ma12213594
复制
发表时间：
2019-11-01
期刊：
影响因子：
3.4
通讯作者：
Xu, Peifei
中科院分区：
文献类型：
--
作者：
Chen, Zhiming;Pan, Shidong;Xu, Peifei
准确预测渗透率是优化纤维增强复合材料成型工艺，从而提高复合材料质量，降低制造过程中材料和人工成本的关键。本文采用实验和数值模拟相结合的方法研究了2.5维机织预型件在剪切变形下的渗透性。用径向流法测定了不同剪切角下试样的渗透率。建立了基于织物微观结构和剪切变形的代表性体积元模型，预测了预制件的透气性，并将模拟结果与实验值进行了比较，验证了模型的有效性。使用该模型，纤维体积分数对2.5D织造预制件的渗透性的影响被确定。根据2.5维机织预型件的结构特点、实验和模拟结果，建立了预测其剪切变形下渗透率的经验公式。评价了该方程的预测精度，并利用该方程确定了2.5D机织预型件的渗透率随剪切变形的变化。
The accurate prediction of the permeability is the key to optimizing the molding process of fiber reinforced composites, thus to improve the composite quality, and reduce the material and labor costs in the manufacturing process. In this paper, the permeability of 2.5D woven preform with shear deformation was studied by experiments and numerical simulations. The permeabilities of the samples under various shear angles were measured by the radial flow method. An RVE (representative volume element) model based on the fabric microstructure and shear deformation is developed to predict the permeability of preform and the simulation results are compared with experiments value to verify the effectiveness of this model. Using this model, the effect of the fiber volume fraction on the permeability of the 2.5D woven preform was determined. Based on the structural characteristics, experimental and simulation results of the 2.5D woven preform, an empirical equation for predicting its permeability under shear deformation was formulated. The prediction accuracy of the equation was evaluated, and the equation was used to determine the change of permeability with shear deformation for the 2.5D woven preform.