Transient dynamic response of tubes to internal detonation loading

Abstract

This paper reports the analytical and numerical modeling of transient–dynamic response of tubes to internal detonation loading. Since gaseous detonation involves loads that propagate at high speeds, the excitations of flexural waves in the tube wall become significant. Flexural waves can result in high strains, which may exceed the equivalent static strains by up to a factor of 4. The presented analytical model, which considers the effects of transverse shear and rotary inertia, provides a very good simulation of the structural response of cylindrical tubes with finite length to internal detonation loading. It is shown that the predictions provided by this model are in better agreement with the experimental results, as compared to the existing analytical models. In the numerical part of this study, several finite element analyses are carried out to obtain the structural response of the tube to pressure loads moving at different speeds. The results of the analytical and numerical simulations are compared with experimental results reported in the literature.