Effect of Cladding on Biaxially Loaded Underclad Part-Through Cracks

    Volume 7, Issue 4 (April 2010)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 30 April 2010

    Page Count: 18


    Scibetta, M.
    SCK•CEN, Mol,

    Lucon, E.
    SCK•CEN, Mol,

    Houben, T.
    SCK•CEN, Mol,

    (Received 21 May 2009; accepted 22 March 2010)

    Abstract

    Fracture toughness testing on standard specimens in the ductile to brittle transition regime is well established and standardized by the ASTM since 1997. However, its applicability to structural components and its potential conservatism remain a subject of concern. In structural integrity assessment of reactor pressure vessels submitted to an accidental loading condition called pressurized thermal shock, the cladding is generally considered not to play any role and is neglected. However, cladding has the ability to restrain the crack from opening due to its good ductility. To investigate the potential safety margin, a semielliptical crack introduced by fatigue is covered by a stainless steel cladding and specimens are tested under biaxial conditions in the ductile to brittle transition regime. Test results shows that cladding plays a significant role and contributes to an additional safety margin. In addition, cladding increases the potential for crack arrest.


    Paper ID: JAI102544

    DOI: 10.1520/JAI102544

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    Author
    Title Effect of Cladding on Biaxially Loaded Underclad Part-Through Cracks
    Symposium Ninth International ASTM/ESIS Symposium on Fatigue and Fracture Mechanics (37th ASTM National Symposium on Fatigue and Fracture Mechanics), 2009-05-22
    Committee E08