دانلود رایگان مقاله لاتین آکوستیک لانه زنبوری از سایت الزویر
عنوان فارسی مقاله:
لانه زنبوری آکوستیک جدید با افزایش سختی و مقاومت کمانش صفحه
عنوان انگلیسی مقاله:
A novel auxetic honeycomb with enhanced in-plane stiffness and buckling strength
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
As an ultra-light material with physical and structural functions, cellular materials are attractive for use in lightweight structures, energy-absorbing and heat transfer devices [1–6]. For a long time, scientists have focused on revealing the relations between the honeycombs’ mechanical properties and their geometric configurations. In recent years, there is a surge of research into a class of cellular materials with negative Poisson’s ratio (NPR) due to their superior physical properties and abnormal characteristics. Re-entrant and roll-up are the two most common mechanisms to achieve negative value of Poisson’s ratio. As a typical structure with negative Poisson’s ratio, the re-entrant structures, including 2D re-entrant honeycomb and 3D re-entrant lattice, have been extensively studied. Gibson and Ashby [1] developed a seminal model that successfully predicts Young’s modulus and Poisson’s ratio for conventional hexagonal honeycomb, considering the axial and transverse shear of cell walls as well as bending. A refined cell wall’s bending model by adding a beam’s stretching and hinging motion was introduced by Masters and Evans [7]. Both the approaches used by Gibson and Ashby [1] and Masters and Evans [7] are able to model the normal re-entrant hexagonal honeycomb (NRHH). Besides, there are other analytical and numerical models to describe the in-plane elastic constants of the NRHH [8,9]. The influences of the cell-wall angle on the indentation resistance of the re-entrant hexagonal honeycombs were studied by Hu and Deng [10] though numerical tests and theoretical analysis. Under large deformation, both the Poisson’s ratio [11] and shear modulus [12] of the re-entrant hexagonal honeycombs were investigated systematically. Based on the NRHH, a new 2D centresymmetric honeycomb configuration [13] and a 3D periodic re-entrant lattice structure [14–18] were designed and late studied in deep on their elastic properties. As well as the elastic properties of cellular materials, collapse is important in applications. According to Gibson and Ashby’s work [1], collapse of the cellular materials due to the buckling becomes more likely as relative density is reduced. The asymmetrical buckling mode of three cell edges for conventional hexagonal honeycomb with uniform-thickness cell edges under uniaxial compression was suggested by Gibson and Ashby [1]. Using the similar analytical model, the in-plane elastic buckling strength of regular hexagonal honeycomb with Plateau borders was derived by Chuang and Huang [19]. The theoretical framework for buckling analysis of conventional hexagonal honeycomb used by Gibson and Ashby [1] is able to model the normal re-entrant hexagonal honeycomb (NRHH). Wang and McDowell [2] approximated the buckling strengths of a series of common cellular structures by means of a simplistic approach involving the equivalent beam length for cell walls of different periodic structures (i.e., square cellhoneycomb, triangular cell honeycomb, mixed cell honeycomb, Kagome cell honeycomb, diamond cell honeycomb and rectangular cell honeycomb). In Haghpanah et al.’s work [20], a method based on classical beam-column end-moment behavior expressed in a matrix form was applied to sample honeycombs with square, triangular and hexagonal unit cells to determine their buckling strength under a general macroscopic in-plane stress state. Until now, the research on the in-plane buckling analysis of auxetic structures is rarely reported.
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کلمات کلیدی:
Publication: A novel auxetic honeycomb with enhanced in-plane ... https://www.researchgate.net/.../309381333_A_novel_auxetic_honeycomb_with_enhan... Feb 21, 2017 - References, authors & citations for 'A novel auxetic honeycomb with enhanced in-plane stiffness and buckling strength' on ResearchGate. In-plane elasticity of a novel auxetic honeycomb design - University of ... research-information.bristol.ac.uk/.../inplane-elasticity-of-a-novel-auxetic-honeycomb... Feb 1, 2017 - This work presents a novel negative Poisson's ratio honeycomb design composed by two parts (a re-entrant hexagonal component and a thin ... [PDF]A novel auxetic honeycomb with enhanced in-plane stiffness and ... iranarze.ir/wp-content/uploads/2016/11/E507.pdf Oct 22, 2016 - A novel auxetic honeycomb with enhanced in-plane stiffness and ... into the normal re-entrant hexagonal honeycomb (NRHH), in order to ... A novel auxetic honeycomb with enhanced in-plane stiffness and ... isi-dl.com/item/212084 ... worldscientific.com. SEARCH. A novel auxetic honeycomb with enhanced in-plane stiffness and buckling strength. sciencedirect.com. Source Link ... Novel honeycombs with auxetic behaviour - Technische ... - TIB https://www.tib.eu/en/search/id/.../Novel-honeycombs-with-auxetic-behaviour/?tx... Auxetic Honeycombs for Composite Sandwich Panels. Masters, I. G. / Evans, K. E. / Canadian Association for Composite Structures and Materials | Conference ... Mechanical Properties of Auxetic Cellular Material Consisting of Re ... www.mdpi.com/1996-1944/9/11/900/pdf by X Zhang - 2016 - Related articles Nov 7, 2016 - It has been found that auxetic honeycomb structures not only show an ..... R.N. A novel process for the manufacture of auxetic foams and for. Auxetic Cellular Materials - a Review - Journal of Mechanical ... en.sv-jme.eu/data/upload/2016/09/01_2016_3656_Novak_03.pdf by N Novak - 2016 - Cited by 4 - Related articles of novel 3D cellular auxetic materials is being ... three main groups: auxetic honeycombs, auxetic ... Conventional and auxetic honeycomb 2D structures.
