蜂巢和辅助沙漏晶格转移结构静态和动态响应中的非线性裁剪证据

IF 1.9 4区 工程技术 Q3 MECHANICS
Vivek Gupta , Sondipon Adhikari , Bishakh Bhattacharya
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引用次数: 0

摘要

大自然的形态和最佳能量解决方案仍然是设计基于细胞的晶格结构的主要动力。在元结构框架下,了解此类结构的不同晶格拓扑结构所产生的非线性动力学行为,对于将其成功应用于与振动和形状控制相关的各种新型设计和技术至关重要。本文研究了具有沙漏形或穹顶形转移结构的辅助晶格和蜂窝晶格的静态和动态响应。本文讨论了通过各种设计参数定制此类响应的非线性的可能性,这些参数在塑造此类结构的动态特性方面起着至关重要的作用。通过数值模拟和实验研究评估了电池设计参数对所产生的宏观行为的影响。报告了从软化到硬化非线性动态响应的转变过程,涉及的单元拓扑结构包括从常规蜂窝到辅助拓扑等广泛用作蜂窝材料设计基本单元的拓扑结构。实验研究基于测量的时间响应来验证数值预测。实验系统由不同的三维打印沙漏样品组成,这些样品基于辅助网格和蜂窝网格,使用激光多普勒测振仪对其进行动态测试。本文提出的设计策略可集成到各种基于晶格的材料中,用于噪声和振动控制应用以及生物医学设备。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evidence of nonlinearity tailoring in static and dynamic responses of honeycomb and auxetic hourglass lattice metastructures

Nature’s morphology and optimal energetic solutions remain the key motivation for designing cellular-based lattice structures. Understanding the nonlinear dynamical behaviors that arise from different lattice topologies of such structures in the metastructure framework is crucial for their successful implementation in various novel designs and technologies related to vibration and shape control. This paper presents a study of the static and dynamic response of auxetic and honeycomb lattices with hourglass or dome-shaped metastructures. The potential tailoring of nonlinearity of such responses through various design parameters that play a vital role in shaping the dynamic properties of such structures is discussed here. The impact of cell design parameters on the resulting macroscopic behavior is assessed using both numerical simulations and experimental studies. The transition from softening to hardening nonlinear dynamic responses is reported with cell topologies ranging from the regular honeycomb to auxetic topologies that are widely used as fundamental cells of cellular materials design. The experimental study is based on the time responses measured to verify the numerical predictions. The experimental system consists of different 3D printed hourglass samples based on the auxetic and honeycomb lattices on which dynamic testing using a laser Doppler vibrometer is performed. The design strategies proposed in this paper can be integrated into a wide range of lattice-based materials for noise and vibration control applications and biomedical devices.

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来源期刊
CiteScore
4.10
自引率
4.20%
发文量
114
审稿时长
9 months
期刊介绍: Mechanics Research Communications publishes, as rapidly as possible, peer-reviewed manuscripts of high standards but restricted length. It aims to provide: • a fast means of communication • an exchange of ideas among workers in mechanics • an effective method of bringing new results quickly to the public • an informal vehicle for the discussion • of ideas that may still be in the formative stages The field of Mechanics will be understood to encompass the behavior of continua, fluids, solids, particles and their mixtures. Submissions must contain a strong, novel contribution to the field of mechanics, and ideally should be focused on current issues in the field involving theoretical, experimental and/or applied research, preferably within the broad expertise encompassed by the Board of Associate Editors. Deviations from these areas should be discussed in advance with the Editor-in-Chief.
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