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| Title: | Surface fracturing of armatures within helical flux-compression generators | |
| Author (s): | Baird, J. Worsey, Paul Nicholas | |
| Department/Lab Affiliations: | Mining & Nuclear Engineering Rock Mechanics & Explosives Research Center | |
| Keywords: | C-4 high explosive armature tube armatures brisant explosives compressive detonation wave compressive regions crazing detonation waves exploding wires explosive charge explosive pressurization flux cutoff fracture helical flux compression generators helical flux-compression generator high pressure gases high strain rate effects high strain-rate resistivity changes longitudinal cracks polymeric materials pulse generators pulsed power supplies surface cracking surface fracturing tensile regions thin metallic structure thin metallic structures tube structure fractures | |
| Issue Date: | 2001 | |
| Publisher: | Institute of Electrical and Electronics Engineers | |
| Citation: | Baird, J.; Worsey, P.N., "Surface fracturing of armatures within helical flux-compression generators," Pulsed Power Plasma Science, PPPS-2001, Digest of Technical Papers, Vol.1, 2001, Pages: 94- 97 | |
| Abstract: | Tubes of aluminum and of copper filled with C-4 high-explosive were tested during this study of high strain rate effects within thin metallic structures performed as an adjunct to helical flux-compression generator research at the University of Missouri-Rolla. Focusing on the stresses within a relatively thin metallic structure when brisant explosives abutting the structure are detonated, this study directly affects the understanding of flux cutoff and high strain-rate resistivity changes in an expanding armature. The detonation wave is compressive, and the shock waves resulting from its transmission into a thin metallic structure cause both compressive and tensile regions, posing an extremely complex stress field within the structure. This stress field bears directly upon how the tube structure fractures when it is impulsively loaded by high pressure gases as a result of the detonation. Longitudinal cracks characteristically develop in the outer surface of the armature tubing within about two diameters of the end containing the detonator, but the cracks do not extend as the tubing expands under explosive pressurization. Such cracks are a cause of flux cutoff in the generators, a cause that can be isolated during generator operation given proper generator construction. Surface cracking of the armatures was modified by the utilization of bimetallic armature construction, and by the introduction of polymeric materials between the explosive charge and the armature tube. | |
| Type: | Article - Conference proceedings text | |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. FULL COPYRIGHT INFORMATION: | |
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| title | Surface fracturing of armatures within helical flux-compression generators | |
| contributor.author | Baird, J. | |
| contributor.author | Worsey, Paul Nicholas | |
| contributor.deptlab | Mining & Nuclear Engineering | |
| contributor.deptlab | Rock Mechanics & Explosives Research Center | |
| subject | C-4 high explosive | |
| subject | armature tube | |
| subject | armatures | |
| subject | brisant explosives | |
| subject | compressive detonation wave | |
| subject | compressive regions | |
| subject | crazing | |
| subject | detonation waves | |
| subject | exploding wires | |
| subject | explosive charge | |
| subject | explosive pressurization | |
| subject | flux cutoff | |
| subject | fracture | |
| subject | helical flux compression generators | |
| subject | helical flux-compression generator | |
| subject | high pressure gases | |
| subject | high strain rate effects | |
| subject | high strain-rate resistivity changes | |
| subject | longitudinal cracks | |
| subject | polymeric materials | |
| subject | pulse generators | |
| subject | pulsed power supplies | |
| subject | surface cracking | |
| subject | surface fracturing | |
| subject | tensile regions | |
| subject | thin metallic structure | |
| subject | thin metallic structures | |
| subject | tube structure fractures | |
| date.issued | 2001 | |
| date.submitted | 2007 | |
| publisher | Institute of Electrical and Electronics Engineers | |
| identifier.citation | Baird, J.; Worsey, P.N., "Surface fracturing of armatures within helical flux-compression generators," Pulsed Power Plasma Science, PPPS-2001, Digest of Technical Papers, Vol.1, 2001, Pages: 94- 97 | |
| identifier.pub.URI | ||
| description.abstract | Tubes of aluminum and of copper filled with C-4 high-explosive were tested during this study of high strain rate effects within thin metallic structures performed as an adjunct to helical flux-compression generator research at the University of Missouri-Rolla. Focusing on the stresses within a relatively thin metallic structure when brisant explosives abutting the structure are detonated, this study directly affects the understanding of flux cutoff and high strain-rate resistivity changes in an expanding armature. The detonation wave is compressive, and the shock waves resulting from its transmission into a thin metallic structure cause both compressive and tensile regions, posing an extremely complex stress field within the structure. This stress field bears directly upon how the tube structure fractures when it is impulsively loaded by high pressure gases as a result of the detonation. Longitudinal cracks characteristically develop in the outer surface of the armature tubing within about two diameters of the end containing the detonator, but the cracks do not extend as the tubing expands under explosive pressurization. Such cracks are a cause of flux cutoff in the generators, a cause that can be isolated during generator operation given proper generator construction. Surface cracking of the armatures was modified by the utilization of bimetallic armature construction, and by the introduction of polymeric materials between the explosive charge and the armature tube. | |
| type | Article - Conference proceedings | |
| type.DCMIType | text | |
| type.status | Final version | |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. | |
| rights.URI | ||
| date.accessioned | 2007-04-05T14:13:08Z | |
| date.available | 2007-04-05T14:13:07Z | |
| identifier.persist.URI | ||
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