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    Nonidealized Surface to Through Wall Crack Transition Model for Axial Cracks in Cylinders

    Source: Journal of Pressure Vessel Technology:;2016:;volume( 138 ):;issue: 001::page 11203
    Author:
    Shim, Do
    ,
    Park, Jeong
    ,
    Rudland, David
    DOI: 10.1115/1.4030625
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Recent studies have shown that a subcritical surface crack, due to primary water stress corrosion cracking (PWSCC), can transition to a throughwall crack (TWC) with significant differences between the inner diameter (ID) and outer diameter (OD) crack lengths. This behavior has been observed for both circumferential and axial cracks. Recently, a surface to TWC transition model has been developed for circumferential cracks using existing K and COD (crack opening displacement) solutions for nonidealized circumferential TWCs. In this paper, a similar crack transition model (CTM) was developed for axial cracks. As a first step, a study was conducted to define the appropriate crack front shape for nonidealized axial TWCs. Then, elastic finite element analyses were carried out to develop K and COD solutions using these crack front shapes. The newly developed solutions were utilized for the CTM. The present CTM includes a criterion for transitioning the final surface crack to the initial nonidealized TWC. This criterion determines when the transition should occur (based on surface crack depth) and determines the two crack lengths (at ID and OD surfaces) of the initial nonidealized TWC. Furthermore, nonidealized TWC growth calculation can be conducted using the proposed model. Example results (crack length and COD) obtained from the proposed model were compared to those obtained from the natural crack growth simulations. Results presented in this paper demonstrated the applicability of the proposed model for simulating axial crack transition.
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      Nonidealized Surface to Through Wall Crack Transition Model for Axial Cracks in Cylinders

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    contributor authorShim, Do
    contributor authorPark, Jeong
    contributor authorRudland, David
    date accessioned2017-05-09T01:32:35Z
    date available2017-05-09T01:32:35Z
    date issued2016
    identifier issn0094-9930
    identifier otherpvt_138_01_011203.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/162308
    description abstractRecent studies have shown that a subcritical surface crack, due to primary water stress corrosion cracking (PWSCC), can transition to a throughwall crack (TWC) with significant differences between the inner diameter (ID) and outer diameter (OD) crack lengths. This behavior has been observed for both circumferential and axial cracks. Recently, a surface to TWC transition model has been developed for circumferential cracks using existing K and COD (crack opening displacement) solutions for nonidealized circumferential TWCs. In this paper, a similar crack transition model (CTM) was developed for axial cracks. As a first step, a study was conducted to define the appropriate crack front shape for nonidealized axial TWCs. Then, elastic finite element analyses were carried out to develop K and COD solutions using these crack front shapes. The newly developed solutions were utilized for the CTM. The present CTM includes a criterion for transitioning the final surface crack to the initial nonidealized TWC. This criterion determines when the transition should occur (based on surface crack depth) and determines the two crack lengths (at ID and OD surfaces) of the initial nonidealized TWC. Furthermore, nonidealized TWC growth calculation can be conducted using the proposed model. Example results (crack length and COD) obtained from the proposed model were compared to those obtained from the natural crack growth simulations. Results presented in this paper demonstrated the applicability of the proposed model for simulating axial crack transition.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleNonidealized Surface to Through Wall Crack Transition Model for Axial Cracks in Cylinders
    typeJournal Paper
    journal volume138
    journal issue1
    journal titleJournal of Pressure Vessel Technology
    identifier doi10.1115/1.4030625
    journal fristpage11203
    journal lastpage11203
    identifier eissn1528-8978
    treeJournal of Pressure Vessel Technology:;2016:;volume( 138 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian