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    Progressive Damage Analysis of Web Crippling of GFRP Pultruded I-Sections

    Source: Journal of Composites for Construction:;2017:;Volume ( 021 ):;issue: 003
    Author:
    Francisco Nunes
    ,
    Nuno Silvestre
    ,
    João R. Correia
    DOI: 10.1061/(ASCE)CC.1943-5614.0000762
    Publisher: American Society of Civil Engineers
    Abstract: Glass fiber–reinforced polymer (GFRP) pultruded profiles are prone to web buckling and/or crushing when subjected to concentrated loads in the direction transverse to the pultrusion axis due to their low elastic and strength properties. Based on a recent work in which it was concluded that the Tsai-Hill criterion does not succeed in providing reasonable estimates of the web-crippling capacity of GFRP profiles, in the present work another progressive damage model is implemented into a finite-element (FE) model for web-crippling analysis. First, previous web crippling experiments on I-section GFRP profiles are summarized. Then the basis of the FE model is presented (element types, failure initiation criteria, and damage model) and results of preliminary analyses (mesh size and viscous regularization) are discussed. Subsequently, the load versus displacement curves, damage zones, and failure modes of GFRP profiles under different load configurations and bearing lengths are presented. Finally, the model sensitivity to different parameters (transverse compressive strength, in-plane shear strength, matrix compressive fracture energy, modeling of web-flange rounded corner) is analyzed. The proposed model is shown to be much more accurate than those based on Tsai-Hill criterion. It is also shown that the in-plane shear strength governs failure initiation, while the transverse compressive strength is more influential to the profiles’ ultimate behavior. This study also highlights the major impact of fracture energy in the behavioral response of GFRP profiles subjected to transverse concentrated loads.
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      Progressive Damage Analysis of Web Crippling of GFRP Pultruded I-Sections

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4245402
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    contributor authorFrancisco Nunes
    contributor authorNuno Silvestre
    contributor authorJoão R. Correia
    date accessioned2017-12-30T13:04:50Z
    date available2017-12-30T13:04:50Z
    date issued2017
    identifier other%28ASCE%29CC.1943-5614.0000762.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4245402
    description abstractGlass fiber–reinforced polymer (GFRP) pultruded profiles are prone to web buckling and/or crushing when subjected to concentrated loads in the direction transverse to the pultrusion axis due to their low elastic and strength properties. Based on a recent work in which it was concluded that the Tsai-Hill criterion does not succeed in providing reasonable estimates of the web-crippling capacity of GFRP profiles, in the present work another progressive damage model is implemented into a finite-element (FE) model for web-crippling analysis. First, previous web crippling experiments on I-section GFRP profiles are summarized. Then the basis of the FE model is presented (element types, failure initiation criteria, and damage model) and results of preliminary analyses (mesh size and viscous regularization) are discussed. Subsequently, the load versus displacement curves, damage zones, and failure modes of GFRP profiles under different load configurations and bearing lengths are presented. Finally, the model sensitivity to different parameters (transverse compressive strength, in-plane shear strength, matrix compressive fracture energy, modeling of web-flange rounded corner) is analyzed. The proposed model is shown to be much more accurate than those based on Tsai-Hill criterion. It is also shown that the in-plane shear strength governs failure initiation, while the transverse compressive strength is more influential to the profiles’ ultimate behavior. This study also highlights the major impact of fracture energy in the behavioral response of GFRP profiles subjected to transverse concentrated loads.
    publisherAmerican Society of Civil Engineers
    titleProgressive Damage Analysis of Web Crippling of GFRP Pultruded I-Sections
    typeJournal Paper
    journal volume21
    journal issue3
    journal titleJournal of Composites for Construction
    identifier doi10.1061/(ASCE)CC.1943-5614.0000762
    page04016104
    treeJournal of Composites for Construction:;2017:;Volume ( 021 ):;issue: 003
    contenttypeFulltext
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