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    Electromechanical Effects of a Screw Dislocation Around a Finite Crack in a Piezoelectric Material

    Source: Journal of Applied Mechanics:;2002:;volume( 069 ):;issue: 001::page 55
    Author:
    J. H. Kwon
    ,
    K. Y. Lee
    DOI: 10.1115/1.1427692
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The interaction between a screw dislocation and a finite crack in an unbounded piezoelectric medium is studied in the framework of linear piezoelectric theory. A straight screw dislocation with the Burgers vector, which is normal to the isotropic basal plane, positioned around the tip of a finite crack is considered. In addition to having a discontinuous electric potential across the slip plane, the dislocation is assumed to be subjected to a line force and a line charge at the core. The explicit solution is derived by means of complex variable and conformal mapping methods. All field variables such as stress, strain, electric field, electric displacement near the crack tip, and the forces on a screw dislocation, the field intensity factors, and the energy release rate are determined under the combined out-of-plane mechanical and in-plane electrical loads. Also, the effects of screw dislocation and electrical loads are numerically analyzed.
    keyword(s): Force , Screws , Fracture (Materials) , Dislocations , Piezoelectric materials , Stress , Electric fields AND Displacement ,
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      Electromechanical Effects of a Screw Dislocation Around a Finite Crack in a Piezoelectric Material

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    http://yetl.yabesh.ir/yetl1/handle/yetl/126321
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    contributor authorJ. H. Kwon
    contributor authorK. Y. Lee
    date accessioned2017-05-09T00:06:42Z
    date available2017-05-09T00:06:42Z
    date copyrightJanuary, 2002
    date issued2002
    identifier issn0021-8936
    identifier otherJAMCAV-26529#55_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/126321
    description abstractThe interaction between a screw dislocation and a finite crack in an unbounded piezoelectric medium is studied in the framework of linear piezoelectric theory. A straight screw dislocation with the Burgers vector, which is normal to the isotropic basal plane, positioned around the tip of a finite crack is considered. In addition to having a discontinuous electric potential across the slip plane, the dislocation is assumed to be subjected to a line force and a line charge at the core. The explicit solution is derived by means of complex variable and conformal mapping methods. All field variables such as stress, strain, electric field, electric displacement near the crack tip, and the forces on a screw dislocation, the field intensity factors, and the energy release rate are determined under the combined out-of-plane mechanical and in-plane electrical loads. Also, the effects of screw dislocation and electrical loads are numerically analyzed.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleElectromechanical Effects of a Screw Dislocation Around a Finite Crack in a Piezoelectric Material
    typeJournal Paper
    journal volume69
    journal issue1
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.1427692
    journal fristpage55
    journal lastpage62
    identifier eissn1528-9036
    keywordsForce
    keywordsScrews
    keywordsFracture (Materials)
    keywordsDislocations
    keywordsPiezoelectric materials
    keywordsStress
    keywordsElectric fields AND Displacement
    treeJournal of Applied Mechanics:;2002:;volume( 069 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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