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    On the Crushing Stress of Open Cell Foams

    Source: Journal of Applied Mechanics:;2006:;volume( 073 ):;issue: 005::page 807
    Author:
    Lixin Gong
    ,
    Stelios Kyriakides
    DOI: 10.1115/1.2047608
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The compressive response of many foams is characterized by an initial linearly elastic regime which is terminated by instability. For open cell foams instability leads to localized buckling and collapse of zones of cells. Local collapse in these zones is terminated by contact between cell ligaments. In the process collapse spreads to neighboring cells hitherto intact. The spreading of collapse occurs at a well-defined load plateau and continues until most of the cells are thus affected when the material response regains stiffness once more. This type of three-regime compressive response was reproduced numerically by idealizing such foams to be assemblages of space-filling Kelvin cells. The onset of instability involves a long wavelength mode. It has been established by considering a fully periodic column of cells tall enough to accommodate this mode. The crushing response has been evaluated by considering finite size microsections which allow localized deformation to develop. This paper shows that the crushing stress can also be established from the local response of the fully periodic column of cells through an energy argument leading to a Maxwell-type construction.
    keyword(s): Foams (Chemistry) AND Stress ,
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      On the Crushing Stress of Open Cell Foams

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    contributor authorLixin Gong
    contributor authorStelios Kyriakides
    date accessioned2017-05-09T00:18:34Z
    date available2017-05-09T00:18:34Z
    date copyrightSeptember, 2006
    date issued2006
    identifier issn0021-8936
    identifier otherJAMCAV-26602#807_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/133002
    description abstractThe compressive response of many foams is characterized by an initial linearly elastic regime which is terminated by instability. For open cell foams instability leads to localized buckling and collapse of zones of cells. Local collapse in these zones is terminated by contact between cell ligaments. In the process collapse spreads to neighboring cells hitherto intact. The spreading of collapse occurs at a well-defined load plateau and continues until most of the cells are thus affected when the material response regains stiffness once more. This type of three-regime compressive response was reproduced numerically by idealizing such foams to be assemblages of space-filling Kelvin cells. The onset of instability involves a long wavelength mode. It has been established by considering a fully periodic column of cells tall enough to accommodate this mode. The crushing response has been evaluated by considering finite size microsections which allow localized deformation to develop. This paper shows that the crushing stress can also be established from the local response of the fully periodic column of cells through an energy argument leading to a Maxwell-type construction.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleOn the Crushing Stress of Open Cell Foams
    typeJournal Paper
    journal volume73
    journal issue5
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.2047608
    journal fristpage807
    journal lastpage814
    identifier eissn1528-9036
    keywordsFoams (Chemistry) AND Stress
    treeJournal of Applied Mechanics:;2006:;volume( 073 ):;issue: 005
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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