SYMPOSIA PAPER Published: 01 January 1973
STP49647S

A Method for Measuring KIc

Source

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.

Author Information

Shockey, D., A.
Stanford Research Institute, Menlo Park, Calif.
Curran, D., R.
Stanford Research Institute, Menlo Park, Calif.
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Details
Developed by Committee: E08
Pages: 297–311
DOI: 10.1520/STP49647S
ISBN-EB: 978-0-8031-8151-9
ISBN-13: 978-0-8031-6660-8