Mechanics Research Communications最新文献_第5页

Evidence of nonlinearity tailoring in static and dynamic responses of honeycomb and auxetic hourglass lattice metastructures 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 2.4 4区工程技术

Mechanics Research Communications Pub Date : 2024-03-14 DOI: 10.1016/j.mechrescom.2024.104261

Vivek Gupta , Sondipon Adhikari , Bishakh Bhattacharya

{"title":"Evidence of nonlinearity tailoring in static and dynamic responses of honeycomb and auxetic hourglass lattice metastructures","authors":"Vivek Gupta , Sondipon Adhikari , Bishakh Bhattacharya","doi":"10.1016/j.mechrescom.2024.104261","DOIUrl":"https://doi.org/10.1016/j.mechrescom.2024.104261","url":null,"abstract":"<div><p>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.</p></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140145450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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A brief review of solitary waves in nonlinear metamaterials 非线性超材料中的孤波简评

IF 2.4 4区工程技术

Mechanics Research Communications Pub Date : 2024-03-03 DOI: 10.1016/j.mechrescom.2024.104260

Nan Gao, Tianxue Ma, Weijian Zhou, Yue-Sheng Wang, Weiqiu Chen

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An implicit computational approach in strain-gradient brittle fracture analysis 应变梯度脆性断裂分析中的隐式计算方法

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Mechanics Research Communications Pub Date : 2024-03-01 DOI: 10.1016/j.mechrescom.2024.104259

Salvatore Sessa , Emilio Barchiesi , Luca Placidi

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Form-finding for tensegrity structures based on the equilibrium equation 基于平衡方程的张拉整体结构的形式求解

IF 2.4 4区工程技术

Mechanics Research Communications Pub Date : 2024-03-01 DOI: 10.1016/j.mechrescom.2024.104256

Ziying Cao, Ani Luo, Yaming Feng, Heping Liu

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Preface: Special issue in origami engineering and physics 前言：折纸工程与物理学》特刊

IF 2.4 4区工程技术

Mechanics Research Communications Pub Date : 2024-03-01 DOI: 10.1016/j.mechrescom.2024.104258

Edwin A. Peraza Hernandez, Glaucio H. Paulino

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Modelling and analysis of a novel E-shape piezoelectric vibration energy harvester with dynamic magnifier 带动态放大器的新型 E 形压电振动能量收集器的建模与分析

IF 2.4 4区工程技术

Mechanics Research Communications Pub Date : 2024-02-20 DOI: 10.1016/j.mechrescom.2024.104257

Yongyong Cao , Yuqiao Zheng , Xutao Mei , Fugang Dong , Rong Xu , Chenglong Shi , Pengcheng Zhang , Kongyuan Wei , Yabing Li

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Variational study of a Maxwell–Rayleigh-type finite length model for the preliminary design of a tensegrity chain with a tunable band gap Maxwell-Rayleigh 型有限长度模型的变量研究，用于带隙可调的张力合成链的初步设计

IF 2.4 4区工程技术

Mechanics Research Communications Pub Date : 2024-02-05 DOI: 10.1016/j.mechrescom.2024.104255

Luca Placidi , Fabio Di Girolamo , Roberto Fedele

{"title":"Variational study of a Maxwell–Rayleigh-type finite length model for the preliminary design of a tensegrity chain with a tunable band gap","authors":"Luca Placidi , Fabio Di Girolamo , Roberto Fedele","doi":"10.1016/j.mechrescom.2024.104255","DOIUrl":"https://doi.org/10.1016/j.mechrescom.2024.104255","url":null,"abstract":"<div><p>In this study, a Maxwell–Rayleigh-type model is investigated, describing a unidimensional lattice with a finite length, where the unit cell includes hosting and resonant masses mutually connected by elastic springs. The configuration selected is inspired by the specific engineering design to be discussed: however, the theoretical approach pursued is rather general and can be easily generalized to different scenarios. By the heuristic homogenization based on a Piola’s Ansatz, an equivalent continuum is specified: through a variational approach, resting on the minimization of the Hamilton’s action functional, a dispersion relation is deduced, revealing the existence of a band gap. Such a continuous interval of frequencies, inside which the propagation of waves is inhibited, can be tuned controlling the features of the original system. Thereafter, exploiting the same equations, the stationary elasto-dynamic response for a chain with a finite length is also deduced, corresponding to standing waves. On the basis of such results, the preliminary design of a linear chain with a finite number of cells is carried out. By the present strategy proper boundary conditions are deduced to be prescribed at the ends of the 1D lattice sample, and not over the unit cell (as it occurs in Bloch–Floquet approach with periodicity conditions). To realize the mutual elastic connections between unequal masses fitting the problem constraints, tensegrity prisms are selected, including compressed bars and tensioned cables, for which it is possible to govern the tangent axial stiffness through the cable pre-tensioning. We analyze the scenario in which the band gap coincides with the interval <span><math><mrow><mn>1</mn><mo>−</mo><mn>10</mn><mspace></mspace><mi>Hz</mi></mrow></math></span>, indicating an appropriate geometry and suitable engineering materials for the tensegrity elements.</p></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139743301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analytical solution for the free transverse vibration of an elastically connected annular plate system with discontinuities 带间断点的弹性连接环形板系统自由横向振动的解析解

IF 2.4 4区工程技术

Mechanics Research Communications Pub Date : 2024-01-30 DOI: 10.1016/j.mechrescom.2024.104254

Junling Fan , Yupeng Wang , Yongbin Ma

{"title":"Analytical solution for the free transverse vibration of an elastically connected annular plate system with discontinuities","authors":"Junling Fan , Yupeng Wang , Yongbin Ma","doi":"10.1016/j.mechrescom.2024.104254","DOIUrl":"10.1016/j.mechrescom.2024.104254","url":null,"abstract":"<div><p>Due to the performance requirements, structural discontinuities are inevitable in engineering structures. Free vibration of an elastically connected annular plate system with discontinuities has not yet been reported in the literature. In this study, an analytical method is developed for the free vibration of an annular plate system with discontinuities along its radius. The annular plates are connected continuously using an elastic layer. The coupled vibration equations of the annular plate system were decoupled into a series of uncoupled general “vibration” equations which are then transferred into a symplectic dual system. The general “vibration” state can then be analytically described in terms of waves utilizing the elastic wave theory. Using the analytical wave modes and satisfying the compatibility and boundary conditions at the discontinuities, a frequency equation can be obtained analytically. In numerical examples, the free vibrations of systems consist of two and three annular plates were investigated. The accuracy of the proposed method is verified by comparison with literature and finite element method (FEM).</p></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139657536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Rounded corner thicken strut re-entrant auxetic honeycomb: Analytical and numerical modeling 圆角加厚支柱重入式辅助蜂窝：分析和数值建模

IF 2.4 4区工程技术

Mechanics Research Communications Pub Date : 2024-01-23 DOI: 10.1016/j.mechrescom.2024.104246

Kaustav Moni Bora , Shailendra Kumar Varshney , Cheruvu Siva Kumar

{"title":"Rounded corner thicken strut re-entrant auxetic honeycomb: Analytical and numerical modeling","authors":"Kaustav Moni Bora , Shailendra Kumar Varshney , Cheruvu Siva Kumar","doi":"10.1016/j.mechrescom.2024.104246","DOIUrl":"10.1016/j.mechrescom.2024.104246","url":null,"abstract":"<div><p><span><span><span>An analytical model is formulated for 2-D periodic negative honeycomb thicken strut re-entrant lattice structures and a modified rounded corner negative honeycomb structure<span> that shows negative Poisson’s ratios (NPR). Analytical modeling is done using Castigliano’s second theorem, where each beam is modeled using Timoshenko beam theory, considering bending, stretching, and transverse shearing. </span></span>Elastic modulus and Poisson’s ratio have been formulated for both structures in the form of non-dimensional geometrical characteristics, such as length ratios, angles of re-entrant arms, </span>shear correction factor, and the material’s Young’s modulus and Poisson’s ratios. Numerical simulations conducted in ABAQUS-CAE </span>explicit solver<span> validate the analytical model. The effect of the non-dimensional parameters on the qualities of the developed structure is demonstrated. It is observed that the structures with a low curvature ratio have a high fluctuation of Poisson’s ratio and Elastic constant when plotted against the other parameters. The slenderness ratio has little impact on Poisson’s ratio but significantly influences elastic modulus. It is shown that various needs can be satisfied by customizing the Poisson’s ratios and elastic constant of both forms of lattice construction over an extensive range by carefully choosing the geometrical parameters and material.</span></p></div>","PeriodicalId":49846,"journal":{"name":"Mechanics Research Communications","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139562073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Constitutive modeling of electro-magneto-rheological fluids before yielding 屈服前电磁流变流体的结构建模

IF 2.4 4区工程技术

Mechanics Research Communications Pub Date : 2024-01-23 DOI: 10.1016/j.mechrescom.2024.104253

Subrat Kumar Behera, Somnath Sarangi

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