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首页> 外文期刊>Journal of thermal stresses >Multi-scale damage modeling of 3D orthogonal woven carbon-carbon composite at elevated temperatures
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Multi-scale damage modeling of 3D orthogonal woven carbon-carbon composite at elevated temperatures

机译：高温下3D正交编织碳复合材料的多尺度损伤建模

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This paper presents a multi-scale structure modeling scheme to analyze the damage behaviors of three-dimensional orthogonal Carbon/Carbon (C/C) composites subject to uniaxial tension at high temperatures. The multi-scale structure model includes a micro-scale and a meso-scale structure model with periodic boundary conditions to homogenize the heterogeneous fiber/matrix system into unit cells. The micro-scale model predicts the mechanical properties at the fiber tow scale in the three orthogonal directions (x, y and z). The output results by the micro-scale simulations are then incorporated in the meso-scale model to demonstrate the locations of stress propagation and the progressive failure behavior of the 3D C/C composite. Based on the numerical approaches, uniaxial tensile strengths of the 3D C/C composite are calculated from 300 to 2500 K, and its temperature dependences are discussed. The current applied multi-scale models provide an efficient approach to predict the tensile strength of 3D textile composites, and will give some highlights for the design of 3D C/C composite components.
机译：本文介绍了多尺度结构建模方案，分析了在高温下受单轴张力受到单轴张力的三维正交碳/碳（C / C）复合材料的损伤行为。多尺度结构模型包括微尺度和间隙结构模型，具有周期性边界条件，以使异构纤维/矩阵系统均匀化为单元电池。微级模型在三个正交方向（X，Y和Z）中预测光纤牵引秤的机械性能。然后将微级模拟的输出结果包含在中间尺度模型中，以展示3D C / C复合材料的应力传播的位置和逐行故障行为。基于数值方法，3D C / C复合材料的单轴拉伸强度计算为300至2500k，讨论其温度依赖性。目前应用的多尺度模型提供了一种有效的方法来预测3D纺织复合材料的拉伸强度，并将为3D C / C复合部件的设计提供一些亮点。

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