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Physics Of Debris Clouds From Hypervelocity Impacts
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Book Synopsis Physics of Debris Clouds from Hypervelocity Impacts by : National Aeronaut Administration (Nasa)
Download or read book Physics of Debris Clouds from Hypervelocity Impacts written by National Aeronaut Administration (Nasa) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The protection scheme developed for long duration space platforms relies primarily upon placing thin metal plates or 'bumpers' around flight critical components. The effectiveness of this system is highly dependent upon its ability to break up and redistribute the momentum of any particle which might otherwise strike the outer surface of the spacecraft. Therefore it is of critical importance to design the bumpers such that maximum dispersion of momentum is achieved. This report is devoted to an in-depth study into the design and development of a laboratory instrument which would permit the in-situ monitoring of the momentum distribution as the impact event occurs. A series of four designs were developed, constructed and tested culminating with the working instrument which is currently in use. Each design was individually tested using the Space Environmental Effects Facility (SEEF) at the Marshall Space Flight Center in Huntsville, Alabama. Along with the development of the device, an experimental procedure was developed to assist in the investigation of various bumper materials and designs at the SEEF. Preliminary results were used to compute data which otherwise were not experimentally obtainable. These results were shown to be in relative agreement with previously obtained values derived through other methods. The results of this investigation indicated that momentum distribution could in fact be measured in-situ as the impact event occurred thus giving a more accurate determination of the effects of experimental parameters on the momentum spread. Data produced by the instrument indicated a Gaussian-type momentum distribution. A second apparatus was developed and it was placed before the shield in the line of travel utilized a plate to collect impact debris scattered backwards. This plate had a passage hole in the center to allow the particle to travel through it and impact the proposed shield material. Applying the law of conservation of angular momentum a backwa...
Book Synopsis Formation and Description of Debris Clouds Produced by Hypervelocity Impact by : A. J. Piekutowski
Download or read book Formation and Description of Debris Clouds Produced by Hypervelocity Impact written by A. J. Piekutowski and published by . This book was released on 1996 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hypervelocity Impact Physics by : William P. Schonberg
Download or read book Hypervelocity Impact Physics written by William P. Schonberg and published by . This book was released on 1991 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hypervelocity Impact Physics by : William P. Schonberg
Download or read book Hypervelocity Impact Physics written by William P. Schonberg and published by . This book was released on 1991 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Debris written by N.N. Smirnov and published by CRC Press. This book was released on 2001-11-29 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: When the first sputnik was launched and the space era began, few gave thought to the possible negative impact of putting satellites into orbit. In fact, man's space activity has led to the formation of a new media named "space debris," i.e. man-made objects and their fragments launched into space, currently inactive and no longer serving any useful purpose. Space Debris: Hazard Evaluation and Mitigation will appeal to readers unfamiliar with the issues, as well as experts and designers. It introduces concepts behind the problems of space ecology. The volume features actual data on the space debris environment; new mathematical models for space debris evolution, production and self-production; description of the existing software and concepts for shield design. The author also reviews methods of collision risk assessment, including the attitudes and inclinations of orbits, collision hazard evaluation and suggestions for preventative measures.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781724243058 Total Pages :338 pages Book Rating :4.2/5 (43 download)
Book Synopsis Hypervelocity Impact Physics by : National Aeronautics and Space Administration (NASA)
Download or read book Hypervelocity Impact Physics written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: All large spacecraft are susceptible to impacts by meteoroids and orbiting space debris. These impacts occur at extremely high speed and can damage flight-critical systems, which can in turn lead to a catastrophic failure of the spacecraft. Therefore, the design of a spacecraft for a long-duration mission must take into account the possibility of such impacts and their effects on the spacecraft structure and on all of its exposed subsystems components. The work performed under the contract consisted of applied research on the effects of meteoroid/space debris impacts on candidate materials, design configurations, and support mechanisms of long term space vehicles. Hypervelocity impact mechanics was used to analyze the damage that occurs when a space vehicle is impacted by a micrometeoroid or a space debris particle. An impact analysis of over 500 test specimens was performed to generate by a hypervelocity impact damage database. Schonberg, William P. and Bean, Alan J. and Darzi, Kent Unspecified Center NASA-CR-4343, NAS 1.26:4343 NAS8-36955...
Book Synopsis Momentum Distribution Analysis of Debris Clouds Generated by Hypervelocity Impact by : Stephen Wayne Richardson
Download or read book Momentum Distribution Analysis of Debris Clouds Generated by Hypervelocity Impact written by Stephen Wayne Richardson and published by . This book was released on 1994 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Momentum Distribution in Debris Cloud During Hypervelocity Impact by : P. LeMaster
Download or read book Momentum Distribution in Debris Cloud During Hypervelocity Impact written by P. LeMaster and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Toward a Characterization of the Debris Cloud Created in a Hypervelocity Impact on a Thin Plate by :
Download or read book Toward a Characterization of the Debris Cloud Created in a Hypervelocity Impact on a Thin Plate written by and published by . This book was released on 1993 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semi-analytical lethality assessment models fall into one of two general categories: discrete particle models and expanding shell models. Discrete particle models account for and track only a small number of solid fragments in a debris cloud generated by a hypervelocity impact. They are best suited for impact scenarios in which melting and/or vaporization of the projectile and target materials do not occur. Expanding shell models assume that all of the debris cloud material is homogeneously distributed over a uniformly expanding spherical shell in those impact scenarios where melting and/or vaporization of the projectile and target materials do occur. A lethality assessment model that considers the creation and subsequent effects of debris clouds containing all three states of matter is needed. This report describes the results of an investigation into the composition of the material in a debris cloud generated by a hypervelocity projectile impact. The work completed represents the first step in a long-term research program whose overall objective is to develop a general model of the response of a target structure to a hypervelocity impact over the 4-16 kilometers per second impact regime.
Book Synopsis Analytical Study of Debris Clouds Formed by Hypervelocity Impacts on Thin Plates by : Martin Rosenblatt
Download or read book Analytical Study of Debris Clouds Formed by Hypervelocity Impacts on Thin Plates written by Martin Rosenblatt and published by . This book was released on 1968 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical study of hypervelocity impact of spheres upon thin targets is described. The study was based upon numerical solutions, utilizing the STEEP code, of six impact cases. (STEEP is a two-dimensional Eulerian technique, based upon a hydrodynamic-elastic-plastic model.) (Author).
Book Synopsis A First-principles Based Model Characterizing the Debris Cloud Created in a Hypervelocity Impact by : William P. Schonberg
Download or read book A First-principles Based Model Characterizing the Debris Cloud Created in a Hypervelocity Impact written by William P. Schonberg and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Hypervelocity Impact Phenomena Using Real-time Concurrent Diagnostics by : Jonathan Michael Mihaly
Download or read book Investigation of Hypervelocity Impact Phenomena Using Real-time Concurrent Diagnostics written by Jonathan Michael Mihaly and published by . This book was released on 2013 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypervelocity impact of meteoroids and orbital debris poses a serious and growing threat to spacecraft. To study hypervelocity impact phenomena, a comprehensive ensemble of real-time concurrently operated diagnostics has been developed and implemented in the Small Particle Hypervelocity Impact Range (SPHIR) facility. This suite of simultaneously operated instrumentation provides multiple complementary measurements that facilitate the characterization of many impact phenomena in a single experiment. The investigation of hypervelocity impact phenomena described in this work focuses on normal impacts of 1.8 mm nylon 6/6 cylinder projectiles and variable thickness aluminum targets. The SPHIR facility two-stage light-gas gun is capable of routinely launching 5.5 mg nylon impactors to speeds of 5 to 7 km/s. Refinement of legacy SPHIR operation procedures and the investigation of first-stage pressure have improved the velocity performance of the facility, resulting in an increase in average impact velocity of at least 0.57 km/s. Results for the perforation area indicate the considered range of target thicknesses represent multiple regimes describing the non-monotonic scaling of target perforation with decreasing target thickness. The laser side-lighting (LSL) system has been developed to provide ultra-high-speed shadowgraph images of the impact event. This novel optical technique is demonstrated to characterize the propagation velocity and two-dimensional optical density of impact-generated debris clouds. Additionally, a debris capture system is located behind the target during every experiment to provide complementary information regarding the trajectory distribution and penetration depth of individual debris particles. The utilization of a coherent, collimated illumination source in the LSL system facilitates the simultaneous measurement of impact phenomena with near-IR and UV-vis spectrograph systems. Comparison of LSL images to concurrent IR results indicates two distinctly different phenomena. A high-speed, pressure-dependent IR-emitting cloud is observed in experiments to expand at velocities much higher than the debris and ejecta phenomena observed using the LSL system. In double-plate target configurations, this phenomena is observed to interact with the rear-wall several micro-seconds before the subsequent arrival of the debris cloud. Additionally, dimensional analysis presented by Whitham for blast waves is shown to describe the pressure-dependent radial expansion of the observed IR-emitting phenomena. Although this work focuses on a single hypervelocity impact configuration, the diagnostic capabilities and techniques described can be used with a wide variety of impactors, materials, and geometries to investigate any number of engineering and scientific problems.
Book Synopsis Experimental Determination of Momentum Distribution in Debris Cloud Produced by Hypervelocity Impact by : Paul Steven LeMaster
Download or read book Experimental Determination of Momentum Distribution in Debris Cloud Produced by Hypervelocity Impact written by Paul Steven LeMaster and published by . This book was released on 1993 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic modeling of debris cloud evolution for axisymmetric hypervelocity impact by : Nicholas Jack Contino
Download or read book Dynamic modeling of debris cloud evolution for axisymmetric hypervelocity impact written by Nicholas Jack Contino and published by . This book was released on 1993 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Workshop for Hypervelocity Impacts in Space by : J. A. M. McDonnell
Download or read book Proceedings of the Workshop for Hypervelocity Impacts in Space written by J. A. M. McDonnell and published by . This book was released on 1992 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Debris written by Walter Flury and published by . This book was released on 2004 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
