晶格结构不同解耦双尺度模拟的相关性研究

IF 0.1 4区 工程技术 Q4 ENGINEERING, AEROSPACE Aerospace America Pub Date : 2023-08-18 DOI:10.3390/aerospace10080723
Natsuki Tsushima, Russell Higuchi, Koji Yamamoto
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引用次数: 0

摘要

通过刻意设计微观的内部机制,建筑材料可以在不改变组成材料的情况下实现多种材料性能。将建筑材料作为子结构集成到结构中,具有提高结构性能和实现更大设计自由度的良好潜力。本文探讨了晶格结构的多尺度方法的能力,这是建筑材料的主要机制。本文的目的是:(1)展示框架用两种不同的双尺度分析方法评估晶格结构刚度特性的能力;(2)评估两种方法对晶格结构进行适当评估的准确性和有效性范围。双尺度分析框架由广义刚度(ABD)和三维刚度(C)矩阵的计算均质化组成。通过计算均质化,获得了单元胞的等效刚度特性,有效地捕捉了晶格结构的宏观响应。本研究为晶格结构的实际建模和开发提供了两尺度分析方法在拉伸、弯曲和扭转刚度特性方面的预测精度之间的全面相关性研究。该研究将为高性能建筑材料结构的有效设计提供指导。
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Correlation Studies of Different Decoupled Two-Scale Simulations for Lattice Structures
By deliberately designing microscopic internal mechanisms, architected materials can achieve a variety of material properties without changing constituent materials. Integration of the architected materials into a structure as substructures has a good potential to enhance structural performance and realize wide design freedom. This paper explores the capabilities of multiscale approaches for lattice structures, which is a major mechanism in architected materials. The objectives of this paper are (1) to demonstrate the capabilities of the framework to evaluate stiffness characteristics of lattice structures with two different two-scale analysis approaches and (2) to assess the accuracies and validity ranges of both approaches for appropriate evaluations of lattice structures. The two-scale analysis framework consists of the computational homogenizations for the generalized stiffness (ABD) and 3D stiffness (C) matrices. Equivalent stiffness characteristics of the unit cell are obtained by computational homogenizations to effectively capture the macroscopic responses of lattice structures. This study provides a comprehensive correlation study between the prediction accuracies of the two-scale analysis approaches in terms of tensile, bending, and torsional stiffness characteristics for practical modeling and development of lattice structures. The study will contribute a guideline for effective designs of high-performance structures with architected materials.
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来源期刊
Aerospace America
Aerospace America 工程技术-工程:宇航
自引率
0.00%
发文量
9
审稿时长
4-8 weeks
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