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    Experimental Studies and Models for Ductile Fracture in ASTM A992 Steels at High Triaxiality

    Source: Journal of Structural Engineering:;2014:;Volume ( 140 ):;issue: 002
    Author:
    Ravi Kiran
    ,
    Kapil Khandelwal
    DOI: 10.1061/(ASCE)ST.1943-541X.0000828
    Publisher: American Society of Civil Engineers
    Abstract: This study presents the results of experimental investigation and models for ductile fracture in the ASTM A992 structural steels subjected to high stress triaxiality. To this end, uniaxial tension tests on the notched tensile specimens are conducted, and subsequent scanning electron microscopy (SEM) studies are performed on the fractured surfaces. From this SEM analysis, the fracture initiation mechanism in ASTM A992 steels is found to be the ductile fracture; however, the fracture propagation mode can be either ductile or cleavage fracture. Nonlinear finite-element analysis of the notched specimens is carried out to obtain the stress triaxiality distributions, and the location of the peak stress triaxiality is found to be strongly correlated to the location of the ductile fracture initiation zones. Finally, two uncoupled ductile fracture prediction models, the void growth model (VGM) and the stress modified critical strain model (SMCS), are calibrated, and the model parameters are provided for A992 steels.
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      Experimental Studies and Models for Ductile Fracture in ASTM A992 Steels at High Triaxiality

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    http://yetl.yabesh.ir/yetl1/handle/yetl/68765
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    • Journal of Structural Engineering

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    contributor authorRavi Kiran
    contributor authorKapil Khandelwal
    date accessioned2017-05-08T22:00:47Z
    date available2017-05-08T22:00:47Z
    date copyrightFebruary 2014
    date issued2014
    identifier other%28asce%29st%2E1943-541x%2E0000870.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/68765
    description abstractThis study presents the results of experimental investigation and models for ductile fracture in the ASTM A992 structural steels subjected to high stress triaxiality. To this end, uniaxial tension tests on the notched tensile specimens are conducted, and subsequent scanning electron microscopy (SEM) studies are performed on the fractured surfaces. From this SEM analysis, the fracture initiation mechanism in ASTM A992 steels is found to be the ductile fracture; however, the fracture propagation mode can be either ductile or cleavage fracture. Nonlinear finite-element analysis of the notched specimens is carried out to obtain the stress triaxiality distributions, and the location of the peak stress triaxiality is found to be strongly correlated to the location of the ductile fracture initiation zones. Finally, two uncoupled ductile fracture prediction models, the void growth model (VGM) and the stress modified critical strain model (SMCS), are calibrated, and the model parameters are provided for A992 steels.
    publisherAmerican Society of Civil Engineers
    titleExperimental Studies and Models for Ductile Fracture in ASTM A992 Steels at High Triaxiality
    typeJournal Paper
    journal volume140
    journal issue2
    journal titleJournal of Structural Engineering
    identifier doi10.1061/(ASCE)ST.1943-541X.0000828
    treeJournal of Structural Engineering:;2014:;Volume ( 140 ):;issue: 002
    contenttypeFulltext
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