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Showing 1 to 13 of 13 for “"hypervelocity impact"”.
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Crater Size in Hypervelocity Impact
Made available in DSpace on 2014-12-09T17:13:41Z (GMT). No. of bitstreams: 1 6711920.pdf: 2541868 bytes, checksum: 7339d3c77948342359b2580ea42841b6 (MD5) Previous issue date: 1967
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Investigations of Hypervelocity Impact Physics
… in orbit are under an increasing threat of impact from orbital debris and naturally occurring meteoroids. While objects larger than 10 cm are routinely tracked and avoided, collisions inevitably occur with smaller objects at relative velocities exceeding 10 km/s. Such hypervelocity impacts …
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Graphene Nano-Composites For Hypervelocity Impact Applications
… its hardware must be designed to survive debris impact. This research introduces new procedures to produce a nano-composite material with mortar-brick nano-structure inspired from nacre. Nacre-like composites were successfully manufactured, based on three host polymers, with a wide range of …
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Multiphysics Model of Hypervelocity Impact and Impact Induced Plasma Formation
Previous studies on hypervelocity impact (HVI) have primarily focused on the mechanical response of solids, namely the projectile and the target. While several experiments have observed plasma formation and associated electromagnetic (EM) emissions, key questions remain unresolved — including the …
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Hypervelocity Impact Analysis of Hybrid Nanocomposite Sensors for Inflatable Space Structures
… faced by these structures in outer space is impact damage by micrometeoroid orbital debris (MMOD) traveling at velocities as high as 15 km/s (Lemmens, Krag, Rosebrock, & Carnelli, 2013). This work presents fabrication and testing of hybrid nanocomposites with carbon nanotubes (CNT) and coarse …
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Numerical study of projectile shape effect on the bumper performance under hypervelocity impact
Impacts in orbit from small micrometeoroids and small non-trackable orbital debris are generally unavoidable and pose a threat to spacecraft due to the high collision speeds exceeding 7 km/s. The design of spacecraft protection against micrometeoroids and orbital debris (MMOD) is generally based on …
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Passive, Self-Healable, Dielectric Elastomers for Structural Health Monitoring
… a self-healable, passive, dielectric elastomer impact sensor for structural health monitoring on inflatable space structures subject to impact by micrometeoroids and orbital debris. In a setting in which impact repairs can be extremely costly, the implementation of such a technology would not …
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Piezoresistive Hybrid Nanocomposites for Strain and Damage Sensing: Experimental and Numerical Analysis
… of the printed devices as strain sensors and impact damage sensors respectively under mechanical strains and hypervelocity impact damages. Devices printed with the minimum number of ink deposited layers lead to the best sensing performance.</p>
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Geologic Setting of the Phoenix Lander Mission Landing Site
… by the ~0.6 Ga, 11.5 km wide, bowl-shaped impact crater, Heimdal, and its areally extensive ejecta deposits. The Lander is located ~20 km to the west of the crater and is sitting on a plains surface underlain by partially eroded Heimdal ejecta deposits. Heimdal was produced by a …
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Real-time observations of materials under dynamic loading conditions at the micron scale
… all-optical experiment. A novel approach for hypervelocity impact testing of materials using microprojectiles and a table-top laser system was also developed in this work. Microparticles were placed on a transparent substrate coated with a laser-absorbing polymer layer. Ablation of the polymer …
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Description and Genesis of the Western Cold Turkey Creek Field Anomaly, Williston Basin, Bowman County, North Dakota
… identified by oil explorationists as a possible impact crater, but its origin remained uncertain. The purpose of this study is to attempt to ascertain if sufficient evidence exists to determine that the anomaly is of impact origin.</p><p>The study area was confined to a nine township area …
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Asteroid deflection and active debris removal methods with spaceborne lasers
… proposed over the years to mitigate the risk of impact between an asteroid and the Earth. Most of the strategies proposed fall into two categories: impulsive and slow-push. Impulsive strategies are usually modelled with an instantaneous change of momentum given by, for example, a nuclear …
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Late accretion to the early Earth and rocky exoplanets
… -- with the nascent planet. It is thought these impacts, delivering vast sums of energy, may have transformed surface environments -- melting Earth's primitive crust, and sterilizing the surface of putative life. In contrast, it is also thought these impacts may have assumed a central role in the …