Linear elastic response of tubes to internal detonation loading
This paper deals with the structural response of a tube to an internal gaseous detonation. An internal detonation produces a pressure load that propagates down the tube. Because the speed of the gaseous detonation can be comparable to the flexural wave group speed, excitation of flexural waves in the tube wall must be considered. Flexural waves can result in much higher strains and stresses than static loading with the same loading pressures. Experiments and numerical simulations were used to determine the structural response. In the experiments, a detonation tube was instrumented with a number of strain gages. A series of experiments was carried out under different conditions. Strains were measured that exceeded the equivalent static strain by up to a factor of 3·9. Special attention was paid to the influence of the detonation speed, reflection and interference of structural waves at flanges and also at the tube end, the linearity of the response, the transient development of the deflection profile, and the influence of detonation cell size. Analytical models and finite element models were used to interpret the observations and to make quantitative predictions of the peak strain.
© 2002 Elsevier Science Ltd. Received 22 May 2000, Accepted 15 October 2001, Available online 25 May 2002. The authors thank Raza Akbar, Eric Schultz, Mike Kaneshige, Eric Burcsu, Lavi Zuhal and Pavel Svitek for their help with the experiments. This research was sponsored by the Netherlands Organization for Scientific Research (NWO). Their support is gratefully acknowledged.
Accepted Version - jsv_02.pdf