STP627

    Influence of the Geometry on Unstable Crack Extension and Determination of Dynamic Fracture Mechanics Parameters

    Published: Jan 1977


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    Abstract

    The dynamic fracture toughness of the high-strength steel VCN-100 (UNI 38 NiCrMo4) is derived from tests on TPB 9 (three-point-bend) specimens. A wide range of crack velocities was obtained by changing the ER (energy ratio) of the specimen at crack instability; the crack velocity was evaluated from load versus time records during crack propagation. The results show a dependence of KID on crack velocity in good agreement with literature data.

    Keywords:

    crack propagation, dynamic properties, fracture strength, fractures (materials), fast fracture, energy ratio (geometry), velocity, bending, high strength steels, fracture properties


    Author Information:

    Angelino, GC
    Head, Materials Engineering Section, Mechanics Division, Centro Informazioni Studi Esperienze, Segrate Milano,


    Paper ID: STP27400S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP27400S


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