Geometric Nonlinearity Effects in the Response of Sandwich Wide PanelsSource: Journal of Applied Mechanics:;2016:;volume( 083 ):;issue: 009::page 91008DOI: 10.1115/1.4033651Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the literature, there are various simplifying assumptions adopted in the kinematic relations of the faces and the core when considering a geometrically nonlinear problem in sandwich structures. Most commonly, only one nonlinear term is included in the faces and the core nonlinearities are neglected. A critical assessment of these assumptions, as well as the effects of including the other nonlinear terms in the faces and the core, is the scope of this paper. The comprehensive investigation of all the nonlinear terms is accomplished by deriving and employing an advanced nonlinear highorder theory, namely, the recently developed “extended highorder sandwich panel theory†(EHSAPT). This theory, which was derived as a linear theory, is first formulated in this paper in its full nonlinear version for the simpler onedimensional case of sandwich wide panels/beams. Large displacements and moderate rotations are taken into account in both faces and core. In addition, a nonlinear EHSAPTbased finite element (FE) is developed. A series of simplified models with various nonlinear terms included are derived accordingly to check the validity of each of these assumptions. Two sandwich panel configurations, one with a “soft†and one with a “hard†core, loaded in threepoint bending, are analyzed. The geometric nonlinearity effects and the relative merits of the corresponding simplifications are analyzed with these two numerical examples. In addition to a relative comparison among all these different assumptions, the results are also compared to the corresponding ones from a commercial FE code.
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contributor author | Yuan, Zhangxian | |
contributor author | Kardomateas, George A. | |
contributor author | Frostig, Yeoshua | |
date accessioned | 2017-05-09T01:25:47Z | |
date available | 2017-05-09T01:25:47Z | |
date issued | 2016 | |
identifier issn | 0021-8936 | |
identifier other | md_138_07_071101.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/160282 | |
description abstract | In the literature, there are various simplifying assumptions adopted in the kinematic relations of the faces and the core when considering a geometrically nonlinear problem in sandwich structures. Most commonly, only one nonlinear term is included in the faces and the core nonlinearities are neglected. A critical assessment of these assumptions, as well as the effects of including the other nonlinear terms in the faces and the core, is the scope of this paper. The comprehensive investigation of all the nonlinear terms is accomplished by deriving and employing an advanced nonlinear highorder theory, namely, the recently developed “extended highorder sandwich panel theory†(EHSAPT). This theory, which was derived as a linear theory, is first formulated in this paper in its full nonlinear version for the simpler onedimensional case of sandwich wide panels/beams. Large displacements and moderate rotations are taken into account in both faces and core. In addition, a nonlinear EHSAPTbased finite element (FE) is developed. A series of simplified models with various nonlinear terms included are derived accordingly to check the validity of each of these assumptions. Two sandwich panel configurations, one with a “soft†and one with a “hard†core, loaded in threepoint bending, are analyzed. The geometric nonlinearity effects and the relative merits of the corresponding simplifications are analyzed with these two numerical examples. In addition to a relative comparison among all these different assumptions, the results are also compared to the corresponding ones from a commercial FE code. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Geometric Nonlinearity Effects in the Response of Sandwich Wide Panels | |
type | Journal Paper | |
journal volume | 83 | |
journal issue | 9 | |
journal title | Journal of Applied Mechanics | |
identifier doi | 10.1115/1.4033651 | |
journal fristpage | 91008 | |
journal lastpage | 91008 | |
identifier eissn | 1528-9036 | |
tree | Journal of Applied Mechanics:;2016:;volume( 083 ):;issue: 009 | |
contenttype | Fulltext |