STP563: Load-Point Compliance of the Charpy Impact Specimen

    Saxton, HJ
    Supervisor, Material Characterization Division, member of technical staff in the Experimental Mechanics Division, member of technical staff in the Exploratory Materials Division, and engineering staff assistant in the Experimental Mechanics Division, Sandia Laboratories, Livermore, Calif.

    Jones, AT
    Supervisor, Material Characterization Division, member of technical staff in the Experimental Mechanics Division, member of technical staff in the Exploratory Materials Division, and engineering staff assistant in the Experimental Mechanics Division, Sandia Laboratories, Livermore, Calif.

    West, AJ
    Supervisor, Material Characterization Division, member of technical staff in the Experimental Mechanics Division, member of technical staff in the Exploratory Materials Division, and engineering staff assistant in the Experimental Mechanics Division, Sandia Laboratories, Livermore, Calif.

    Mamaros, TC
    Supervisor, Material Characterization Division, member of technical staff in the Experimental Mechanics Division, member of technical staff in the Exploratory Materials Division, and engineering staff assistant in the Experimental Mechanics Division, Sandia Laboratories, Livermore, Calif.

    Pages: 20    Published: Jan 1974


    Abstract

    To evaluate the instrumented impact test as a reliable way of collecting high strain rate, plane strain fracture toughness data, a detailed investigation of specimen mechanical performance and specimen-fixture interaction was undertaken. Finite element techniques were applied to calculate the compliance and stress intensity values for Charpy specimens subjected to both roller and pinned supporting conditions. For comparison, experimental compliances were gathered for 7075-T6 aluminum and 1018 steel Charpy specimens tested in slow and fast bending. The results indicate that both small specimen size and anvil friction can affect the interpretation of fracture load data used for KID calculations.

    Keywords:

    impact tests, fracture strength, toughness, bending, friction, impact strength, size effects


    Paper ID: STP32184S

    Committee/Subcommittee: E28.07

    DOI: 10.1520/STP32184S


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