role of melting and vaporization in hypervelocity impact

  • 27 Pages
  • 4.85 MB
  • English
Rand Corporation , Santa Monica, Calif
Statementby R.L. Bjork and A.E. Olshaker.
SeriesResearch memorandum -- RM-3490, Research memorandum (Rand Corporation) -- RM-3490..
ContributionsOlshaker, A. E.
The Physical Object
Pagination27 p. :
ID Numbers
Open LibraryOL17984223M

Title: The Role of Melting and Vaporization in Hypervelocity Impact Author: R.

Description role of melting and vaporization in hypervelocity impact FB2

Bjork Subject: Discussion of the thermodynamics associated with the flow processes in hypervelocity cratering. Based on an evaluation of release temperatures and phases of nine metals as a function of shock strength conducted at Los Alamos, and on data on release temperature as a function of maximum shock pressure, calculations are made indicating that a quantitative evaluation of the effects of heating in an impact process requires a detailed knowledge of the maximum shock pressures as a function of Cited by: 5.


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Applications of the results have been made to the problems of the meteorold hazard, satellite vulnerability, and ICBM defense. This Memorandum discusses the effects which shock-Induced melting and vaporization have upon the Impact by: 5. Hypervelocity impact experiments can give us additional information about thermodynamical properties of matter in extreme state.

In this work we simulate shock--induced melting, fragmentation and. Note Scaling of melt production in hypervelocity impacts from high-resolution numerical simulations Amy C.

Barra,c,⇑, Robert I. Citronb,c a Department of Space Studies, Southwest Research Institute, Walnut St., SuiteBoulder, COUnited States bLaboratory for Atmospheric and Space Physics, Campus BoxUniversity of Colorado, Boulder, COUnited States.

This assessment leads us to conclude that impact melting is common during hypervelocity impact into both crystalline and sedimentary rocks. However, the products are texturally and chemically distinct, which has led to much confusion in the past, particularly in terms of the recognition of impact melts derived from sedimentary rocks.

Conclusions previously drawn about reduced melting/vaporization at lower impact angles may inadequately account for the fate of the impactor and its contributing role in the impact process. This role includes the creation of multiple shear planes (resulting in bulk heating) in the fragmented projectile, the contribution from the downrange ricochet, and free expansion of the by: Hypervelocity Impact of Additively Manufactured A/L Interpenetrating Phase Composites M.R.

French1, 1W.A. Yarberry III, R.L. Bjork, A.E. Olshaker, The role of melting and vaporization in hypervelocity impact, DTIC, [7] B.G. Cour-Palais, Hypervelocity impact in metals, glass and composites, Int.

Impact Hypervelocity Impact. earth scientists have now come to accept that hypervelocity impacts have played a vital role in the development of our planet and in the evolution of life itself (e.g., Sharpton and Ward, ).

Aside from shatter cones, we know now that other features can be used as indicators of impact, in particular the presence of high-Cited by: Abstract. The entropy associated with the thermodynamic states produced by hypervelocity meteoroid impacts at various velocities are calculated for a series of lunar rocks and minerals and compared with the entropy values required for melting and by: Simulations of experiments on shock-induced melting, fragmentation and vaporization in aluminum and zinc targets are presented.

A titanium impactor moves at a velocity of km/s and causes melting of these materials in a shock wave. Under rarefaction thermodynamic path crosses the liquid-vapor coexistence boundary and enters into metastable liquid : M E Povarnitsyn, K V Khishchenko, P R Levashov.

Thus a capability for computing the disintegration behavior of material under hypervelocity impact conditions, in general, must include mathematical models for nucleation, growth, and coalescence of voids and shear bands as well as adequate hlgh-pressure equations of state for melting and vaporization.

Disintegration behavior of metal rods subjected to hypervelocity impact Existing dynamic failure models that treat void and shear bend evolution in materials impacted Cited by: The unique chondrules in CB chondrites probably formed in a vapour-melt plume produced by a hypervelocity impact with an impact velocity greater than 10 kilometres per second.

Simulations of experiments on shock-induced melting, fragmentation and vaporization in aluminum and zinc targets are presented.

A titanium impactor moves at a velocity of km/s and causes melting of these materials in a shock : M E Povarnitsyn, K V Khishchenko, P R Levashov. Abstract. Hypervelocity flows produced by impact of iron and gabbroic anorthosite objects onto a half-space of gabbroic anorthosite at speeds of km/ sec are considered in detCited by: These emission lines are thought to be produced by hypervelocity impacts.

[3] Impact vaporization experiments of silicates have not been studied well in laboratories because two‐stage light‐gas guns, which have been frequently used in previous studies [e.g., Lyzenga and Ahrens, ; Lyzenga et al., ; Svendsen and Ahrens, ; Holland Cited by: Bjork and A.

Olshaker, The Role of Melting and Vaporization in Hypervelocity Impact (The Rand Corp., Santa Monica, California, ), RMPR.

Google Scholar Cited by: 3. In examining hypervelocity impact, various books I, and reports 2'3'4 complete theory for the description of the hypervelocity impact situations such as melting and resolidification, vaporization and condensation, and the kinetics of phase change." Accordingly, the File Size: 2MB.

In such a hypervelocity impact event, the shock pressures exceed the strength of common aerospace materials, and brief shock-induced temperature rises cause melting and vaporization of most structural bodies.

Under these extreme conditions, the failure and deformation of solids can resemble fluid : Andrew Thurber, Javid Bayandor. Shock and Vibration T: Impact phenomena classi cation and state evaluation. Impact velocity Phenomena 2 / Material state. Abstract.

Numerical modeling is a fundamental tool for understanding the dynamics of impact cratering, especially at planetary scales. In particular, processes like melting/vaporization and crater collapse, typical of planetary-scale impacts, are not reproduced in the laboratory, and can only be investigated by numerical by: At very high impact velocities material properties will be dominated by phase-changes, such as melting or vaporization, which cannot be achieved at lower impact velocities.

Development of well-controlled and repeatable hypervelocity launch capabilities is the first step necessary to improve our understanding of material behavior at extreme Cited by: 1.

Johnson, B.

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& Melosh, H. Formation of melt droplets, melt fragments, and accretionary impact lapilli during a hypervelocity impact. Icarus– () ADS. Although vertical hypervelocity impacts result in the annihilation (melting/vaporization) of the projectile, oblique impacts (less than 15 deg) fundamentally.

This is called shock-induced vaporization, and it depends on the materials of the projectiles (Chhabildas et al. Injury caused by this would be similar to chemical explosives. In our experiments, at the highest impact velocities, the projectile Author: Jin Chen, Bin Zhang, Bin Zhang, Wenxue Chen, Jian-Yi Kang, Kui-Jun Chen, Ai-min Wang, Jian-Min Wang.

Repeated shocking as a result of secondary impacts upon individual foam ligaments during the penetration process acts to raise the thermal state of impacting projectiles ; resulting in fragmentation, melting, and vaporization at lower velocities than with.

Melting and boiling point temperatures, latent heat of evaporation, and melting heat of common substances like copper, gold, lead and more - SI units Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications.

Double-Plate Penetration Equations K.B. Hayashida and J.H. Robinson Marshall Space Flight Center, Marshall Space Flight Center, Alabama o Hypervelocity impact test results from the ISS program The final phase is the melt/vaporization phase which occurs in the high-velocity range.

TheCited by: 9. Introduction [2] Impacts are among the most fundamental processes for the planetary evolution. Silicates, the main constituent of inner planets, are estimated to experience incipient vaporization due to shock heating caused by impacts at ∼10 km/s (– GPa) [Ahrens and O'Keefe, ].Generation of impact‐induced vapor clouds may have played an important role in a wide variety of.

The 13th Hypervelocity Impact Symposium melting and vaporization. Finally, a constitutive model for material strength is important for low-speed impacts because strength can final objective is to demonstrate that strength plays an important role in the impact generation of both melt and vapor for low-speed impacts.

In each case, the Cited by: 8.The semispherical crater theory received great challenges from many experiments. Stanyukovich [] found that the crater could be flat with in the research on the vaporization characters of materials under high tungsten projectile hypervelocity impact on aluminum target experiments, Leontyev [] found that when the impact velocity reaches 15 km/s, the crater shape changes from Cited by: 1.

abundant circumstellar silica dust and sio gas created by a giant hypervelocity collision in the ~12 myr hd system C. M. Lisse 1,8, C. H. Chen 2, M. C. Wyatt 3, A. Morlok 4,9, I. Song 5, G. Bryden 6, and P. Sheehan 7.