STP536

    A Method for Measuring KIc at Very High Strain Rates

    Published: Jan 1973


      Format Pages Price  
    PDF (352K) 15 $25   ADD TO CART
    Complete Source PDF (7.0M) 15 $125   ADD TO CART


    Abstract

    A method for determining the plane-strain fracture-toughness KIc of a material at very high strain rates is described and demonstrated on a tough polycarbonate. Tritensile stresses were produced within several tenths of a microsecond in the interior of a small cylindrical specimen by flat-plate impact with a gas gun. A number of previously introduced internal cracks of known size distribution were propagated by the tensile stress resulting from the intersection of rarefaction waves; smaller cracks were not activated. A critical stress intensity factor was calculated from the value of the tensile stress and the critical crack size. The relationship of this value to the plane-strain fracture toughness associated with the artest of a running crack is discussed.

    Keywords:

    fracture properties, mechanical properties, fracture tests, fracture toughness, crack propagation, stresses, strains, polycarbonate, loads (forces)


    Author Information:

    Shockey, D. A.
    Physicists, Stanford Research Institute, Menlo Park, Calif.

    Curran, D. R.
    Physicists, Stanford Research Institute, Menlo Park, Calif.


    Paper ID: STP49647S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP49647S


    CrossRef ASTM International is a member of CrossRef.