Comparison of Fracture Response Of Preflawed Tubes Under Internal Static and Detonation Loading
نویسندگان
چکیده
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.
منابع مشابه
Shepherd Contribution to Fy 04 Asci Annual
Experiments were carried out in FY04 on detonation wave structure, detonation wave diffraction, and the fracture of thin-walled tubes by detonation waves. Computations were performed on detonation wave propagation and the elastic response of tubes to detonation loading. One new effort was initiated on the diffraction of detonation waves, and the other activities were a continuation of previous ...
متن کاملStructural Response of Piping to Internal Gas Detonation
Detonation waves in gas-filled piping or tubing pose special challenges in analysis and prediction of structural response. The challenges arise due the nature of the detonation process and the role of fluid-structure interaction in determining the propagation and arrest of fractures. Over the past ten years, our laboratory has been engaged in studying this problem and developing methodologies f...
متن کاملMultidisciplinary Study of Pulse Detonation Engines
Research at the Explosion Dynamics Laboratories at Caltech over the past three years under an ONR contract has examined many issues critical to Pulse Detonation Engine (PDE) development. These include: fundamental and applied studies of detonation initiation; detonation cell width measurements to characterize fuels, including JP10; visualization of the reaction zone structure of propagating det...
متن کاملFracture response of externally flawed aluminum cylindrical shells under internal gaseous detonation loading
Abstract. Experiments were performed to observe the fracture behavior of thinwall and initially-flawed aluminum tubes to internal gaseous detonation loading. The load can be characterized as a propagating pressure jump with speed of 2.4 km/s and magnitude ranging from 2 to 6 MPa, followed by an expansion wave. Flaws were machined as external axial surface notches. Cracks ran both in the upstrea...
متن کاملFracture Response of Externally Flawed Cylindrical Shells to Internal Gaseous Detonation Loading
Experiments were performed to observe the fracture behavior of thin-wall and initially-flawed aluminum tubes to internal gaseous detonation loading. The pressure load, with speeds exceeding 2 km/s, can be characterized as a pressure peak (ranging from 2 to 6 MPa in these experiments) followed by an expansion wave. Flaws were machined as external axial surface notches. Cracks ran both in the ups...
متن کامل