SYMPOSIA PAPER Published: 01 January 1980
STP27438S

A Model for Dynamic Crack Propagation in a Double-Torsion Fracture Specimen

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A simple one-dimensional mathematical model for rapid fracture and crack arrest in a double-torsion fracture specimen is developed. The model indicates that the crack speed is limited by the torsional wave speed, which depends upon the shear wave speed and the cross-sectional geometry. By appropriate design of the specimen, it appears that some control can be exercised over the portion of the fracture toughness-crack speed relation that the crack tip samples. Analyses are performed for both speed-independent and speed-dependent fracture toughnesses. Qualitatively the predicted crack history for this specimen has many of the characteristics predicted and measured in the more traditional specimens.

Author Information

Popelar, CH
The Ohio State University, Columbus, Ohio
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Details
Developed by Committee: E08
Pages: 24–37
DOI: 10.1520/STP27438S
ISBN-EB: 978-0-8031-4779-9
ISBN-13: 978-0-8031-0317-7