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首页> 外文会议>AIAA/ASCE/AHS/ASC structures, structural dynamics and materials conference;AIAA SciTech Forum >A Study of Hybridization and Architectural Effects on Tensile Response of 3D Woven Textile Composites using the NCYL Multiscale Method
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A Study of Hybridization and Architectural Effects on Tensile Response of 3D Woven Textile Composites using the NCYL Multiscale Method

机译：使用NCYL多尺度方法研究杂交和建筑效果对3D机织纺织复合材料拉伸响应的影响

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This paper presents results of numerical simulations on predicting the progressive damage and failure response of hybrid 3D woven textile composites (3DWTC) subjected to tensile loading, using a novel two-scale computational mechanics framework. Here the term 'hybrid' refers to different constituent fibers, including carbon, glass and kevlar that are infused with SC-15 polymer matrix and integrally woven into a single preform. The hybrid 3DWTCs are made through a 3D textile weaving process. Three different versions of hybridized architectures are examined at the unit cell level to determine the progression of damage and failure under tensile loading. The pre-peak nonlinearity, as caused by matrix microdamage is modeled using the N-layer concentric cylinder model (NCYL)1'2 and the post-peak softening failure response is modeled using a mesh-objective smeared crack approach (SCA)3'4 in a two-scale framework. A micro-CT analysis of all three architectures is conducted and FE models are generated directly from Micro-CT data using the software tool 'Simpleware'. These FE models are the real replication of in-situ geometric imperfections in the structure and subsequently used for progressive damage and failure analysis using the two-scale method. A detailed explanation of the method for a hybrid 2.5D woven textile composite is provided in Patel and Waas.~5 The three different types of hybrid 3DWTCs are compared against one another to understand the benefits of hybridization and the resulting performance enhancements. The numerical simulation results show the effect of microstructure geometric imperfections on the prediction of progressive damage and failure response and are also verified against experimental results.6.
机译：本文介绍了一种数值模拟结果，该结果使用新颖的两尺度计算力学框架预测了混合3D机织织物复合材料（3DWTC）承受拉伸载荷时的渐进式损伤和破坏响应。此处的“混合纤维”一词是指不同的组成纤维，包括碳纤维，玻璃纤维和凯夫拉纤维，它们注入了SC-15聚合物基体并整体编织成一个预成型坯。混合3DWTC通过3D纺织品编织工艺制成。在晶胞水平上检查了三种不同版本的杂交体系结构，以确定在拉伸载荷下破坏和破坏的进程。使用N层同心圆柱模型（NCYL）1'2对由基质微损伤引起的峰前非线性进行建模，并使用网格目标抹平裂纹法（SCA）3'对峰后软化破坏响应进行建模。两级框架中的4。使用“ Simpleware”软件工具对所有三种架构进行了Micro-CT分析，并直接从Micro-CT数据生成了有限元模型。这些有限元模型是结构中原位几何缺陷的真实复制，随后使用两尺度方法进行了渐进式损伤和破坏分析。在Patel和Waas中提供了有关混合2.5D机织纺织复合材料方法的详细说明。〜5将三种不同类型的混合3DWTC相互比较，以了解杂交的好处以及由此产生的性能增强。数值模拟结果表明了微观结构几何缺陷对渐进式损伤和失效响应的预测效果，并与实验结果进行了验证。6。

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