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    Damage Deactivation

    Source: Journal of Applied Mechanics:;1995:;volume( 062 ):;issue: 002::page 450
    Author:
    N. R. Hansen
    ,
    H. L. Schreyer
    DOI: 10.1115/1.2895951
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A phenomenological algorithm, motivated by the “mode I” microcrack opening and closing mechanism, is developed for the deactivation and reactivation of the damage effects as modeled by certain continuum damage mechanics theories. One-dimensional formulations with and without coupled plasticity are used to elucidate concepts associated with damage deactivation and to suggest multidimensional deactivation formulations applicable to continuum damage theories that employ a second-order tensor as the damage measure. Strain-based projection operators are used to deactivate the damage effects in the damage tensor. Motivated by observations from one-dimensional coupled formulations, both the total and elastic strains must be compressive for the damage to be rendered inactive. By introducing smooth functions to represent the transition from the active to the inactive state, discontinuities in the response are avoided. To illustrate the aspects associated with deactivation, a consistent set of examples using a strain-controlled one-cycle uniaxial stress loading is given for each formulation.
    keyword(s): Plasticity , Stress , Tensors , Algorithms , Cycles , Functions , Microcracks AND Mechanisms ,
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      Damage Deactivation

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    http://yetl.yabesh.ir/yetl1/handle/yetl/114882
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    contributor authorN. R. Hansen
    contributor authorH. L. Schreyer
    date accessioned2017-05-08T23:46:28Z
    date available2017-05-08T23:46:28Z
    date copyrightJune, 1995
    date issued1995
    identifier issn0021-8936
    identifier otherJAMCAV-26363#450_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/114882
    description abstractA phenomenological algorithm, motivated by the “mode I” microcrack opening and closing mechanism, is developed for the deactivation and reactivation of the damage effects as modeled by certain continuum damage mechanics theories. One-dimensional formulations with and without coupled plasticity are used to elucidate concepts associated with damage deactivation and to suggest multidimensional deactivation formulations applicable to continuum damage theories that employ a second-order tensor as the damage measure. Strain-based projection operators are used to deactivate the damage effects in the damage tensor. Motivated by observations from one-dimensional coupled formulations, both the total and elastic strains must be compressive for the damage to be rendered inactive. By introducing smooth functions to represent the transition from the active to the inactive state, discontinuities in the response are avoided. To illustrate the aspects associated with deactivation, a consistent set of examples using a strain-controlled one-cycle uniaxial stress loading is given for each formulation.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDamage Deactivation
    typeJournal Paper
    journal volume62
    journal issue2
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.2895951
    journal fristpage450
    journal lastpage458
    identifier eissn1528-9036
    keywordsPlasticity
    keywordsStress
    keywordsTensors
    keywordsAlgorithms
    keywordsCycles
    keywordsFunctions
    keywordsMicrocracks AND Mechanisms
    treeJournal of Applied Mechanics:;1995:;volume( 062 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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