Volume 29, Issue 3 (May 2001)

    J-Integral Evaluation of Single-Edge Notched Specimens under Mixed-Mode I/II Loading

    (Received 20 March 2000; accepted 5 December 2000)

    CODEN: JTEOAD

      Format Pages Price  
    PDF Version 7 $25   ADD TO CART


    Abstract

    Standard test methods of mixed-mode fracture toughness still do not exist, even though a decrease of fracture toughness with increasing Mode II (shear components) has been observed for a number of steels. A J-estimation scheme for mixed-mode loaded single-edge notched specimens is therefore developed in this paper. In accordance with the ASTM Standard E 1820-99, the evaluation of the plastic part of J is based on the measurement of the dissipated plastic energy weighted by a ηpl-factor. Two different approaches for the ηpl-factor are derived. Factors from both showed good correlation with finite element calculations for the specific case of a compact-tension-shear specimen (C(TS)), Finally, a simple clip gage setup for the measurement of the crack-opening displacements needed for the evaluation of the dissipated plastic energy is presented. The problem of the qualification of the mixed-mode crack initiation data is not specifically addressed, but some general comments on this topic are given at the end of the paper.


    Author Information:

    Donne, CD
    German Aerospace Center DLR, Institute of Materials Research, Cologne,

    Pirondi, A
    University of Parma, Parma,


    Stock #: JTE12251J

    ISSN: 0090-3973

    DOI: 10.1520/JTE12251J

    ASTM International is a member of CrossRef.

    Author
    Title J-Integral Evaluation of Single-Edge Notched Specimens under Mixed-Mode I/II Loading
    Symposium , 0000-00-00
    Committee E08