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Parametrically-upscaled continuum damage mechanics (PUCDM) model for plain weave woven composites: Part II model validation and parametric studies

机译:平纹编织复合材料的参数化放大连续体损伤力学 (PUCDM) 模型:第二部分模型验证和参数化研究

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摘要

In this second of the two-part paper, the two-level parametrically-upscaled continuum damage mechanics models (PUCDM-1 and PUCDM-2) developed in the first part Xiao et al. (2022) are applied for multiscale analysis of plain weave composite structures. The material damage response in the intra-yarn unidirectional microstructures and the woven yarn-matrix mesostructures are respectively represented by level-1 and level -2 PUCDM models. The models bridge material length scales through explicit functions of the lower-scale morphological descriptors (representative aggregated micro/mesostructural parameters or RAMPs) and material properties (??(??????)) with high computational efficiency. The paper focuses on model validation with experiments and parametric studies. The model is validated with observations from tensile tests on an hourglass-shaped specimen with good agreement at multiple scales. The validated PUCDM model is then employed for the analysis of multiscale deformation and damage mechanisms in single-edge notched bending (SENB) tests on woven composite beams. Parametric studies are performed to investigate the effect of lower-scale morphology and material properties on the structural damage response of the woven composite beams.
机译:在两部分论文的第二部分中,Xiao et al. (2022) 在第一部分中开发的两级参数化放大连续体损伤力学模型(PUCDM-1 和 PUCDM-2)应用于平纹复合材料结构的多尺度分析。纱内单向微观结构和机织纱基细观结构的材料损伤响应分别用1级和2级PUCDM模型表示。这些模型通过较低尺度形态描述符(代表性的聚合微观/介观结构参数或 RAMP)和材料属性(??(??????))具有很高的计算效率。本文重点介绍通过实验和参数研究进行模型验证。该模型通过对沙漏形试样的拉伸试验观察结果进行了验证,在多个尺度上具有良好的一致性。然后,将经过验证的PUCDM模型用于分析编织组合梁单边缺口弯曲(SENB)试验中的多尺度变形和损伤机制。通过参数化研究,研究了低尺度形貌和材料特性对编织组合梁结构损伤响应的影响。

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