ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 3

A Note on One-Point-Bend Impact Fracture Experiments with Curved Specimens

Giovanola, JH
professor, Swiss Federal Institute of Technology, Lausanne,

Klopp, RW
Research engineers, Poulter Laboratory, SRI International, Menlo Park, CA

Kirkpatrick, SW
Research engineers, Poulter Laboratory, SRI International, Menlo Park, CA

(Received 19 November 1996; accepted 25 March 1997)

Abstract

We describe an extension of the one-point-bend impact test for measuring dynamic initiation fracture toughnesses with curved specimens cut from the wall of tubes. We present the impact response curve for a specific geometry of curved specimen. We validate the extension of the test procedure and data reduction method by comparing (1) the measured dynamic initiation toughness with data obtained with rectangular specimens cut from the wall of the same 300M tube and (2) the stress-intensity history measured in the experiment with that calculated in a dynamic finite element simulation of the test. For both comparisons, the agreement is excellent.

Keywords:
dynamic fracture toughness, one-point-bend test, curved specimen, response curve

Paper ID: JTE11973J
DOI: 10.1520/JTE11973J
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