Development of High-speed Simulator for Composite Structures based on Hierarchical Modeling and Its Verification

基于分层建模的复合结构高速模拟器的研制及验证

• 批准号: 11650069
• 负责人: TAKANO Naoki
• 金额: $ 2.18万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650069/
• 关键词: Heterogeneity; Hierarchical model; Multi-scale analysis; Homogenization method; Finite element mesh superposition method; Composite materials; Porous materials; Process simulation; ミクロ-メゾ-マクロ; 均質化理論; 深絞り成形シミュレーション; 樹脂浸透特性; 局所応力解析

A novel multi-scale computational method using both the asymptotic homogenization method and the finite element mesh superposition method has been developed for various types of composite materials and structures including fiber and particulate reinforced composites and porous materials. In order to verify the numerical simulation via comparison with experimental results or conventional numerical results for real composite materials, a large-scale and high-speed simulator has also been developed.From the standpoint of object materials, textile reinforced polymer matrix composites such as woven and knitted fabrics reinforced plastics, particulate reinforced metal matrix composites and porous ceramics have been analyzed. A hierarchical modeling was applied to the textile composites consisting of single fibers, fiber bundles and macroscopic structures. The strength evaluation and the process simulation were carried out for the textile composites. Especially, a microstructure-based process … More simulation is a new technique, which was verified by the comparison with experimental result. Two types of manufacturing processes of polymer matrix composites were studied ; the one is deep-drawing of knitted fabric reinforced thermoplastics and other is the prediction of permeability for resin transfer molding process. In every simulation including the strength evaluation, complex nonlinear phenomena were considered including damage propagation, solid-fluid interaction and large deformation. Concerning the porous ceramics, the needle-like pores were three-dimensionally modeled using image-based modeling technique. A very large-scale problem with one million finite elements was solved practically on a standard personal computer. The predicted macroscopic properties which reflect the microstructures showed very good coincidence with the measured values.From the standpoint of the computational method, a new categorization of the microscopic heterogeneity was proposed, i.e., the global heterogeneity and the local heterogeneity. The global heterogeneity can be replaced by the homogenized material model using the asymptotic homogenization method. The local heterogeneity can be directly modeled using the finite element mesh superposition method. The finally proposed multi-scale computational method combines the above both methods. It enables us to analyze the microscopic stresses for cracks, voids, inclusions, interface and interphase, considering the interaction between the local heterogeneity and the global behaviors. Less

基于渐近均匀化方法和有限元网格叠加方法，发展了一种新的多尺度计算方法，可用于包括纤维和颗粒增强复合材料以及多孔材料在内的各种复合材料和结构。为了通过与真实的复合材料的实验结果或常规数值模拟结果的比较来验证数值模拟的正确性，本文还开发了一台大型高速模拟机，从目标材料的角度出发，分析了织物增强塑料、颗粒增强金属基复合材料和多孔陶瓷等织物增强聚合物基复合材料。采用分层建模方法，对由单纤维、纤维束和宏观结构组成的纺织复合材料进行建模。对纺织复合材料进行了强度评价和工艺模拟。特别是，基于微结构的工艺 ...更多信息 模拟是一种新的技术，并通过与实验结果的比较得到了验证。研究了两种聚合物基复合材料的制备工艺，一种是针织物增强热塑性塑料的拉深成形工艺，另一种是树脂传递模塑工艺的渗透率预测。在包括强度评估在内的每一次模拟中，都考虑了复杂的非线性现象，包括损伤扩展、固-流相互作用和大变形。对于多孔陶瓷，使用基于图像的建模技术对针状孔进行三维建模。一个非常大规模的问题，一百万有限元实际上解决了一个标准的个人计算机上。从计算方法的角度出发，提出了一种新的微观非均匀性分类方法，即：全局异质性和局部异质性。采用渐近均匀化方法，可以用均匀化材料模型代替整体非均匀性。局部非均匀性可以直接用有限元网格叠加法模拟。最后提出的多尺度计算方法结合了上述两种方法。它使我们能够分析裂纹，空隙，夹杂物，界面和相间的微观应力，考虑局部非均匀性和整体行为之间的相互作用。少

项目成果

高野直樹: "均質化法を用いた不均質材のミクロ-マクロ解析"日本機会学会材料力学部門講演会講演論文集. 16. 241-242 (1999)

Naoki Takano：“使用均质化方法对异质材料进行微观宏观分析”日本机械工程学会材料力学分会论文集 16. 241-242 (1999)。

高野直樹,寺田賢二郎,座古勝,吉岡智美: "均質化法によるテキスタイル複合材料の樹脂透過係数の評価"日本複合材料学会誌. 26・5. 171-178 (2000)

高野直树、寺田健二郎、座子胜、吉冈朋美：“利用均质化法评价纺织复合材料的树脂渗透系数”日本复合材料学会杂志26・5（2000）。

高野直樹: "大域的および局所的不均質性を有する弾性体の数値解析手法について"第49回理論応用力学講演会講演論文集. 45-46 (2000)

Naoki Takano：“关于具有全局和局部不均匀性的弹性体的数值分析方法”第 49 届理论与应用力学会议论文集 45-46 (2000)。

高野直樹: "傾斜ミクロ構造設計による材料機能化"日本複合材料学会誌. 26・1. 9-16 (2000)

高野直树：“通过分级微观结构设计实现材料功能化”日本复合材料学会杂志26・1（2000）。