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    Nonlinear Stability Analysis of Sandwich Wide Panels—Part I: Buckling Behavior

    Source: Journal of Applied Mechanics:;2018:;volume( 085 ):;issue: 008::page 81006
    Author:
    Yuan, Zhangxian
    ,
    Kardomateas, George A.
    DOI: 10.1115/1.4039953
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This is a series of two papers in which the nonlinear stability behavior of sandwich panels is investigated. This part presents the buckling behavior and focuses on the critical load and the buckling mode. The buckling analysis is based on the extended high-order sandwich panel theory (EHSAPT) which takes transverse compressibility and axial rigidity of the core into account. It allows for the interaction between the faces and the core. The geometric nonlinearity, i.e., large displacement with moderate rotation, is considered in both faces and core. The weak form governing equations are derived based on the EHSAPT-based element. Detailed formulations and analysis procedures are provided. It presents a general approach for arbitrary buckling type without decoupling it into isolated global buckling and wrinkling. There are no additional assumptions made about the prebuckling state and buckling mode shape, which are commonly presumed in the literature. In addition, edge effects which are also commonly neglected are included. The prebuckling state is determined via a nonlinear static analysis. Solving an eigenvalue problem yields the critical load and the corresponding eigenvector gives the buckling mode. Sandwich panels with different lengths are studied as examples. Both global buckling and wrinkling are observed. It shows that the axial rigidity of the core has a pronounced effect on both the critical load and the buckling mode.
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      Nonlinear Stability Analysis of Sandwich Wide Panels—Part I: Buckling Behavior

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    contributor authorYuan, Zhangxian
    contributor authorKardomateas, George A.
    date accessioned2019-02-28T11:06:18Z
    date available2019-02-28T11:06:18Z
    date copyright6/1/2018 12:00:00 AM
    date issued2018
    identifier issn0021-8936
    identifier otherjam_085_08_081006.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4252720
    description abstractThis is a series of two papers in which the nonlinear stability behavior of sandwich panels is investigated. This part presents the buckling behavior and focuses on the critical load and the buckling mode. The buckling analysis is based on the extended high-order sandwich panel theory (EHSAPT) which takes transverse compressibility and axial rigidity of the core into account. It allows for the interaction between the faces and the core. The geometric nonlinearity, i.e., large displacement with moderate rotation, is considered in both faces and core. The weak form governing equations are derived based on the EHSAPT-based element. Detailed formulations and analysis procedures are provided. It presents a general approach for arbitrary buckling type without decoupling it into isolated global buckling and wrinkling. There are no additional assumptions made about the prebuckling state and buckling mode shape, which are commonly presumed in the literature. In addition, edge effects which are also commonly neglected are included. The prebuckling state is determined via a nonlinear static analysis. Solving an eigenvalue problem yields the critical load and the corresponding eigenvector gives the buckling mode. Sandwich panels with different lengths are studied as examples. Both global buckling and wrinkling are observed. It shows that the axial rigidity of the core has a pronounced effect on both the critical load and the buckling mode.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleNonlinear Stability Analysis of Sandwich Wide Panels—Part I: Buckling Behavior
    typeJournal Paper
    journal volume85
    journal issue8
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.4039953
    journal fristpage81006
    journal lastpage081006-11
    treeJournal of Applied Mechanics:;2018:;volume( 085 ):;issue: 008
    contenttypeFulltext
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