Zobrazeno 1 - 10
of 13
pro vyhledávání: '"John Q. Ehrgott"'
Publikováno v:
Shock and Vibration, Vol 18, Iss 6, Pp 857-874 (2011)
The dynamic airblast, fragmentation, and soil ejecta loading environments produced by the detonation of surface-laid and shallow-buried mines are major threats to lightweight military vehicles. During the past several years, the US Army has focused c
Externí odkaz:
https://doaj.org/article/b7b6b5b7f7164b27b62a85d8a9462794
Publikováno v:
Shock and Vibration, Vol 2014 (2014)
This paper presents the results of recent ground shock experiments conducted by the U.S. Army Engineer Research and Development Center to further investigate the adequacy of the coupling factor approach to shallow-buried or near-surface detonations.
Externí odkaz:
https://doaj.org/article/bfff7dc7fc8445fd86e7abda5c4434f7
Autor:
Joon Sang Lee, J.E. Windham, Ulrich H. Leiste, D.M. Fox, L.C. Taylor, William L. Fourney, John Q. Ehrgott, Stephen A. Akers
Publikováno v:
International Journal of Impact Engineering. 69:182-193
Small-scale dynamic experiments were performed using explosive charges shallow buried in water or in various soil types at differing initial states. Using the results from these experiments, it was discovered that the amount of momentum transferred t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2c3d569a1676bf9b18d89ea9d2678d2
https://doi.org/10.1016/j.ijimpeng.2014.02.019
https://doi.org/10.1016/j.ijimpeng.2014.02.019
Publikováno v:
Shock and Vibration, Vol 2014 (2014)
This paper presents the results of recent ground shock experiments conducted by the U.S. Army Engineer Research and Development Center to further investigate the adequacy of the coupling factor approach to shallow-buried or near-surface detonations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::736a6af6720f0f790b9378bf64d06b06
https://doi.org/10.1155/2014/789202
https://doi.org/10.1155/2014/789202
Publikováno v:
Transportation Research Record: Journal of the Transportation Research Board. 1698:61-69
The researchers’ primary objective was to evaluate the early-strength characteristics of self-compacting concrete (SCC), which is a type of concrete that can be placed without external vibration, even in congested areas. Two unique characteristics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b1ce88de7479646cc967c46860810b8
https://doi.org/10.3141/1698-09
https://doi.org/10.3141/1698-09
Publikováno v:
SP-281: Behavior of Concrete Structures Subjected to Blast and Impact.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b8a7f209854de96d3014545a8c6cbd3
https://doi.org/10.14359/51683623
https://doi.org/10.14359/51683623
Publikováno v:
Journal of the Geotechnical Engineering Division. 106:839-852
Stress-strain curves from 61 uniaxial strain tests are presented which depict the response of three dry sands to intense transient pressures; the loadings ranged from 10 MPa to 80 MPa and were applied with rise times ranging from a few tenths of a mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e764227d335122075b78f2bb7128994
https://doi.org/10.1061/ajgeb6.0001014
https://doi.org/10.1061/ajgeb6.0001014
Autor:
John Q Ehrgott
There has been little research into the kinetic friction developed between surfaces of rapidly moving geologic materials. This report documents the results of laboratory friction tests conducted on prepared surfaces of a limestone, a dolomite, and a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51f9b0039de99354e0d0463af7d41c0f
https://doi.org/10.21236/ada132692
https://doi.org/10.21236/ada132692
In order to investigate the effective stress response of fully saturated soil under high total stress (69 MPa), two test devices were designed. Both devices are capable of back-pressure saturating test specimens and of measuring pore fluid pressures.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09bb8a00a84b85748a2002dcaf3b3f61
https://doi.org/10.21236/ada171877
https://doi.org/10.21236/ada171877
Autor:
John Q Ehrgott
The formulation of constitutive relations for use in computerized analyses of free-field ground shock phenomena is based primarily on laboratory- determined material properties. These properties, as described by stress-strain relations, are not direc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0af3270c7e700800663e9a750f353326
https://doi.org/10.21236/ad0724619
https://doi.org/10.21236/ad0724619