STP1207

    Single-Specimen Test Analysis to Determine Lower-Bound Toughness in the Transition

    Published: Jan 1994


      Format Pages Price  
    PDF Version (252K) 15 $25   ADD TO CART
    Complete Source PDF (16M) 15 $219   ADD TO CART


    Abstract

    A method is proposed for determining a lower-bound fracture toughness value from the result of a single test in the transition region for steels. The method is based on the size criterion of Iwadate et al. for determining the number of tests needed to characterize toughness adequately at a given condition and a Weibull statistical distribution. The method was evaluated by determining a lower-bound toughness value for 68 sets of data, which include over 700 fracture toughness values in the transition. The lower-bound estimate was judged to be conservative if all of the lower-bound estimates were lower than the lowest toughness value in the set. The method was conservative for more than 60% of the data sets and for more than 95% of the individual toughness values. In addition, the method was evaluated by comparing it with 4 methods that used multiple specimens for determining a lower-bound toughness. The single-specimen method gave essentially the same lower-bound estimates as the other multiple-specimen methods.

    Keywords:

    fracture, cleavage, transition, toughness, lower bound, steel, single specimen


    Author Information:

    Landes, JD
    Professor, University of Tennessee, Knoxville, TN

    Zerbst, U
    Visiting scientist, Supervisor of Size Effects, and Brittle Fracture Group, visiting scientist, and director of fracture mechanics research, GKSS, Institut für Werkstofforschung, Geesthacht,

    Heerens, J
    Visiting scientist, Supervisor of Size Effects, and Brittle Fracture Group, visiting scientist, and director of fracture mechanics research, GKSS, Institut für Werkstofforschung, Geesthacht,

    Petrovski, B
    Visiting scientist, Supervisor of Size Effects, and Brittle Fracture Group, visiting scientist, and director of fracture mechanics research, GKSS, Institut für Werkstofforschung, Geesthacht,

    Schwalbe, K-H
    Visiting scientist, Supervisor of Size Effects, and Brittle Fracture Group, visiting scientist, and director of fracture mechanics research, GKSS, Institut für Werkstofforschung, Geesthacht,


    Paper ID: STP13705S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP13705S


    CrossRef ASTM International is a member of CrossRef.