SYMPOSIA PAPER Published: 01 January 1974

Load-Point Compliance of the Charpy Impact Specimen


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.

Author Information

Saxton, HJ
Sandia Laboratories, Livermore, Calif.
Jones, AT
Sandia Laboratories, Livermore, Calif.
West, AJ
Sandia Laboratories, Livermore, Calif.
Mamaros, TC
Sandia Laboratories, Livermore, Calif.
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Developed by Committee: E28
Pages: 30–49
DOI: 10.1520/STP32184S
ISBN-EB: 978-0-8031-4647-1
ISBN-13: 978-0-8031-0738-0