Results 211 to 220 of about 284,250 (248)
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PARTICLE-SOLID IMPACT PHENOMENA
1962Abstract : High velocity impact tests were made with high prity aluminum and copper projectiles and targets. Data are presented for impact velocities from 0.762 to 7.62 km/sec, and these are compared with various correlation formulas.
E. H. GOODMAN, C. D. LILES
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Phenomena resulting from hypervelocity impact
Journal of Spacecraft and Rockets, 1965Crater damage to a thick plate via hypervelocity impact can be predicted from the tensile strength established by standard metallurgical techniques. Some of the results indicate that the frequently quoted empirical rule that the thickness of a plate that will just prevent penetration by a high-velocity particle is approximately 1.5 times the depth of ...
ROBERT F. ROLSTEN, HAROLD H. HUNT
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Hypervelocity-impact phenomena via molecular dynamics
Physical Review A, 1987Novel molecular-dynamics calculations have been carried out for a hypervelocity impact of a sphere of 683 atoms (a central atom surrounded by 23 coordination shells) hitting a rectangular plate composed of 8000 atoms (five close-packed planes thick). The ratio of the sphere diameter to the plate thickness was chosen to be approximately 2.4, with the ...
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Impact Phenomena at High Speeds
Journal of Applied Physics, 1956A study of high speed, metal-to-metal impact in the velocity range 1 to 5 mm/μsec using ⅛-inch diameter spherical pellets is described. Pellet materials include aluminum, magnesium, steel, brass, lead, and zinc. Experiments relating to the mechanisms of cratering and the perforation of thin targets are presented. For the ⅛-in.
M. E. Van Valkenburg +2 more
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MeV-cluster impacts and related phenomena
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1996Point defect creation in 8.7 MeV C5-cluster irradiated LiF crystals have been studied in a dose range from 2 × 1010 up to 1 × 1013 C5+/cm2 and compared to the defect creation in similar conditions with single energetic carbon ions. An enhancement of the primary defect creation (F-centres) and aggregation (F2-centres) has been measured in a near surface
A. Perez, M. Döbeli, H.A. Synal
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Elastoplastic phenomena in multibody impact dynamics
Computer Methods in Applied Mechanics and Engineering, 2006zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Schiehlen, Werner +2 more
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Impact ionization phenomena in AlGaAs/GaAs HEMTs
IEEE Transactions on Electron Devices, 1991The impact ionization current in AlGaAs/GaAs high-electron-mobility-transistors (HEMTs) is evaluated by means of measurements of the gate current and high drain voltages. A previously reported method to calculate impact ionization coefficient in GaAs MESFETs is extended to HEMTs.
C. CANALI +5 more
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Photoelastic phenomena in plastics during impact
Polymer Engineering & Science, 1962AbstractThe study of strain patterns in deformed, transparent plastic placed between crossed Polaroids can shed considerable light on the responses of these plastics to stress. This article describes a study of the differing responses of three thermoplastics of varying degrees of toughness to the notched Izod impact test.
N. W. Hall, R. E. Wright, W. C. Smith
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Electronic and Ion Impact Phenomena
Physics Bulletin, 1970Vol 1 Collisions of Electrons with Atoms H S W Massey and E H S Burhop London: Oxford University Press 1969 pp xxvi + 664 price £10 Vol 2 Electron Collisions with Molecules–Photoionization H S W Massey London: Oxford University Press 1969 pp xxiv+ 1294 price £10 The first edition of this book has become a standard text in a field which has seen ...
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Possible Impact Phenomena (PIPs)
2009This chapter presents a catalog of documented events on the Moon likely (or possibly) resembling impact phenomena. These events are referred to by the author as possible impact phenomena (PIPs).The catalog was assembled from several different sources, listed later, and is divided into sections by century, beginning with the twelfth century.
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