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Experimental and numerical investigation on draping behaviour of woven carbon fabric
Journal of Industrial Textiles ( IF 3.2 ) Pub Date : 2021-08-10 , DOI: 10.1177/15280837211038850
Venkateswaran Santhanakrishnan Balakrishnan 1 , Manoja Rao Yellur 1 , Janina Juliane Roesch 2 , Lars Ulke-Winter 1 , Holger Seidlitz 1
Affiliation  

In the liquid composite moulding (LCM) process, fabric is draped over the mould surface and a resin is injected under pressure to develop a composite laminate. Wrinkling is one of the most common flaws that occurs during the draping of the fabric. Wrinkling of the fabric within the composite could severely reduce the quality of the finished composite laminate. Thus, to develop a high-quality composite laminate, exact prediction of fabric wrinkling behaviour is necessary. The aim of the paper is to investigate the draping behaviour of carbon fabric. Carbon fabric with an areal density of 245 g/m2 is used in the study. Both experimental and numerical investigations were performed. An experimental setup was developed to predict the draping behaviour of the carbon fabric used in the study. LS-DYNA/Explicit solver is used to achieve macro level draping simulation. Material model MAT_REINFORCED_THERMOPLASTIC [MAT_249] offers the possibility to simulate the forming behaviour of a thermoplastic material. To simulate dry fabrics using MAT_249, a very low properties are used for the matrix in the material model. To capture the forming behaviour of fabric, an intensive material characterization has been performed. Tensile and shear properties of the fabrics were determined using uniaxial and picture frame tests, respectively. Influence of the position of the integration points from the mid surface on bending behaviour is studied and calibrated using a simple test.



中文翻译:

机织碳纤维织物悬垂性的实验与数值研究

在液态复合成型 (LCM) 工艺中,将织物覆盖在模具表面上,并在压力下注入树脂以形成复合层压板。起皱是织物悬垂过程中最常见的缺陷之一。复合材料内织物的起皱会严重降低成品复合材料层压板的质量。因此,要开发高质量的复合层压板,必须准确预测织物起皱行为。本文的目的是研究碳纤维织物的悬垂行为。面密度为 245 g/m 2 的碳纤维织物在研究中使用。进行了实验和数值研究。开发了一个实验装置来预测研究中使用的碳织物的悬垂行为。LS-DYNA/Explicit 求解器用于实现宏观层次的悬垂模拟。材料模型 MAT_REINFORCED_THERMOPLASTIC [MAT_249] 提供了模拟热塑性材料成型行为的可能性。为了使用 MAT_249 模拟干织物,材料模型中的基体使用了非常低的属性。为了捕捉织物的成型行为,已经进行了密集的材料表征。织物的拉伸和剪切性能分别使用单轴和相框测试确定。

更新日期:2021-08-10
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