Comparison of Fracture Response of Preflawed Tubes Under Internal Static and Detonation Loading

Creators: Chao, Tong Wa; Shepherd, Joseph E.

Abstract

The role of loading rate and fluid properties in the fracture of piping under internal explosions is an important issue for designers and accident analysis. This was examined by fracture experiments on thin-walled and preflawed aluminum 6061-T6 tubes. The tubes were (1) statically loaded with oil, (2) statically loaded with nitrogen, and (3) dynamically loaded with gaseous detonations traveling at 2.4 km/s. The tubes were also instrumented with pressure transducers, crack detection gages, and strain gages. The experiments were controlled so that comparisons could be made on identical specimens. Fracture behavior was discussed along with fluid dynamics.

Additional Information

© 2004 ASME. Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division November 18, 2003; revision received February 9, 2004. Associate Editor: W. L. Cheng. The authors thank W. G. Knauss and G. Ravichandran for their helpful discussions and additionally thank Prof. Knauss for the loan of the hydraulic pump and hose. Our thanks also go to A. J. Rosakis and D. D. Anderson for lending us the circuit for conditioning crack detection gage signals. This research was sponsored in part through the Office of Naval Research (ONR) contract N00014-99-1-0744 and by the US DOE through the Caltech ASCI project.

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