热成型过程中工艺参数对编织复合材料纤维重新取向的影响研究

doi:10.19936/j.cnki.2096-8000.20251128.011

摘要/Abstract

摘要： 复合材料的成型过程改变了材料的内部结构,从而改变了复合材料部件的材料特性。特别是当部件的几何形状相对复杂时,编织复合材料的热成型过程会导致横向纤维和纵向纤维之间的角度发生变化。为了研究成型过程引起的纤维重新取向以及哪些因素会影响纤维的重新取向,本文建立了基于亚弹性本构定律的有限元模型,并通过半球形成型实验,从预浸料的纤维重新取向分布和边界轮廓两方面验证了该模型。更重要的是,本文通过U形结构的成型实验和模拟,进一步验证了该模型对纤维重新取向的预测能力。此外,通过对U形结构的成型模拟,本文全面讨论了摩擦系数、夹持力和夹持位置对纤维重新取向的影响。结果表明,这些工艺参数都是影响纤维重新取向的重要因素,应在热成型过程中进行优化。

关键词: 编织复合材料, 热成型工艺, 有限元模型, 纤维重新取向, 参数化研究

Abstract: The formation process of composite materials alters the internal structure, which subsequently impacts the properties of the composite component. This is especially evident when the geometry of the part is complex; the forming of the woven composite may result in alterations in the warp and weft angles. To investigate the fiber reorientation induced by forming processes and to identify the influencing factors, a finite element model (FEM) employing a hypoelastic constitutive law was developed. This model was validated through hemispherical forming experiments, focusing on two primary aspects: fiber reorientation distribution and the boundary profile of the prepreg. Moreover, the paper extends the validation to U-shaped structures, where forming experiments and simulations are conducted to further substantiate the model’s predictive capability regarding fiber reorientation. Additionally, the impact of various factors such as the coefficient of friction, blank holding force (BHF), and blank holding area (BHA) on fiber reorientation is extensively analyzed through the forming simulations of the U-shaped structure. The results show that these process parameters are important factors affecting fiber reorientation and should be optimized during thermoforming.

Key words: woven composites, thermoforming, finite element model, fiber reorientation, parametric studies

中图分类号:

TB332

陈盼, 钟愉承. 热成型过程中工艺参数对编织复合材料纤维重新取向的影响研究[J]. 复合材料科学与工程, 2025, 0(11): 86-94.

CHEN Pan, ZHONG Yucheng. Study on the influence of process parameters on fiber reorientation of woven composite during thermoforming[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(11): 86-94.

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