Auxetic metamaterials subjected to dynamic loadings

IF 0.7 Q4 MECHANICS
Georgios K. Tairidis, I. Ntintakis, G. Drosopoulos, Panagiotis Koutsianitis, G. Stavroulakis
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引用次数: 0

Abstract

Materials with negative Poisson?s ratio are called auxetics and they present enhanced properties (e.g. damping, indentation resistance, fracture toughness and impact resistance) under external loadings. The auxetic properties are derived from peculiar-shaped microstructures, such as starshaped frames. In the present investigation, several applications are studied using auxetic microstructures. Finite element models are developed for dynamic analysis. First, an application related to auxetic microstructures, for the core of structural panels, is presented. Next, the use of auxetic materials in armor plates in dynamic bullet penetration problems is considered. Finally, a numerical simulation for wind turbines blades, with aluminum foam, polymeric foam and the proposed auxetic material is carried out. The numerical results demonstrate that the use of auxetic microstructures results in improved dynamic response of the system in comparison to conventional materials.
受动态载荷作用的形变超材料
负泊松?S比率被称为助剂,它们在外部载荷下表现出增强的性能(例如阻尼、抗压痕、断裂韧性和抗冲击性)。这种减振特性来自于特殊形状的微观结构,如星形框架。在本研究中,研究了几种利用形变显微组织的应用。建立了有限元模型进行动力分析。首先,介绍了一种与结构板芯的生长性微结构相关的应用。其次,考虑了弹丸动态侵彻问题中装甲板中增氧材料的应用。最后,对采用泡沫铝、聚合物泡沫和所提出的增塑剂的风力发电机叶片进行了数值模拟。数值计算结果表明,与常规材料相比,采用形变微结构可以改善系统的动态响应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
4
审稿时长
32 weeks
期刊介绍: Theoretical and Applied Mechanics (TAM) invites submission of original scholarly work in all fields of theoretical and applied mechanics. TAM features selected high quality research articles that represent the broad spectrum of interest in mechanics.
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