STP700

    Statistical Characterization of Fracture in the Transition Region

    Published: Jan 1980


      Format Pages Price  
    PDF (288K) 15 $25   ADD TO CART
    Complete Source PDF (8.8M) 15 $60   ADD TO CART


    Abstract

    Fracture toughness results are measured in the transition region for an ASTM A471 Ni-Cr-Mo-V steel on two specimen sizes 1T compact tension (CT) and 4T-CT. The results are typical for steels in the transition in that the smaller specimen toughness values are greater than the larger specimen results. Two explanations are given for this behavior. One explanation, based on loss of constraint, suggests that small specimens cannot be used to characterize the toughness of a large structure in the transition region. A second explanation, based on a statistical model, suggests that small specimen results when properly analyzed can be used to characterize the toughness of large structures.

    The results of these tests and others support the statistical model as the proper explanation for the observed difference in toughness between small and large specimens in the transition. The model gives a method for analyzing small specimen results to properly predict the toughness of a large structure.

    Keywords:

    fracture toughness, J-integral, Ni-Cr-Mo-V steel, transition effects, Weibull statistics, specimen size effects, cleavage fracture, fractures (materials), crack propagation


    Author Information:

    Landes, JD
    Advisory engineer, Structural Behavior of Materials Department and manager, Mathematics Department, Westinghouse Research and Development Center, Pittsburgh, Pa

    Shaffer, DH
    Advisory engineer, Structural Behavior of Materials Department and manager, Mathematics Department, Westinghouse Research and Development Center, Pittsburgh, Pa


    Paper ID: STP36981S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP36981S


    CrossRef ASTM International is a member of CrossRef.