Volume 1, Issue 1 (January 2004)

    Constraint Correction of Fracture Toughness CTOD for Fracture Performance Evaluation of Structural Components

    (Received 31 August 2001; accepted 9 May 2002)

    Published Online: 2004

    CODEN: JAIOAD

      Format Pages Price  
    PDF Version 19 $25   ADD TO CART


    Abstract

    A correction of CTOD for constraint loss in large-scale yielding conditions is made on the basis of the Weibull stress fracture criterion that eliminates an excessive conservatism in the conventional fracture assessment and material fracture toughness requirement. A CTOD ratio β = δ3P / δWP (<1) is proposed, where δWP is the CTOD of a wide plate component and δ3P is an equivalent CTOD of the fracture toughness specimen at which the toughness specimen gives a compatible Weibull stress with the wide plate. The CTOD ratio β is decreased to a large extent after full yielding of the wide plate component, which is more significant for a high yield ratio YR and a deep surface crack in the wide plate. The Weibull modulus m exerts a marginal influence on β. A case study is presented on the application of the CTOD ratio β to the fracture performance assessment of full-scale column-to-beam connections subjected to cyclic and dynamic loading.


    Author Information:

    Minami, F
    Associate Professor, Graduate School of Engineering, Osaka University, Suita, Osaka,

    Arimochi, K
    General Manager, Plate & Structural Steel Project Promoting Department, Sumitomo Metal Industries, LTD., Hyogo,


    Stock #: JAI10615

    ISSN: 1546-962X

    DOI: 10.1520/JAI10615

    ASTM International is a member of CrossRef.

    Author
    Title Constraint Correction of Fracture Toughness CTOD for Fracture Performance Evaluation of Structural Components
    Symposium Predictive Materials Modeling: Combining Fundamental Physics Understanding, Computational Methods, 2001-11-09
    Committee E08