Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Stephen G. Grantham"'
Publikováno v:
The Imaging Science Journal. 57:326-332
The application of speckle metrology to high strain rate materials characterisation, through the use of appropriate high-speed photography, provides an exciting opportunity for measurements to be performed on materials, and in loading configurations,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::582272273018e15f95ae2db667318217
https://doi.org/10.1179/174313109x454783
https://doi.org/10.1179/174313109x454783
Autor:
Fredrik Forsberg, Stephen G. Grantham
Publikováno v:
Powder Technology. 146:56-65
In this paper, the flow of a powder through a silo is investigated using Digital Speckle Radiography (DSR). This technique allows displacement measurements to be made on the sub-mm scale to an accuracy of 0.06 μm and a spatial resolution of 26 μm.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::039669c4cb5e0d9678f351bc1257393a
https://doi.org/10.1016/j.powtec.2004.07.009
https://doi.org/10.1016/j.powtec.2004.07.009
Publikováno v:
The Imaging Science Journal. 51:175-186
Digital speckle radiography is a measurement technique which is capable of visualizing internal flow fields within an opaque material undergoing a ballistic impact. This recent development has been...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64963ec1395ca26b7edbb1fa370bde26
https://doi.org/10.1080/13682199.2003.11784423
https://doi.org/10.1080/13682199.2003.11784423
Publikováno v:
AIP Conference Proceedings.
A method was developed at the Cavendish Laboratory (Cambridge University) to determine the internal displacement characteristics of a polymer rod undergoing classic Taylor impact. Using a layer of lead filings on the central plane of the rod and Digi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30005a56b40834909d58ffc8d1992cae
https://doi.org/10.1063/1.2263570
https://doi.org/10.1063/1.2263570
Publikováno v:
MEASUREMENT SCIENCE and TECHNOLOGY. 15(9)
The application of high-speed photography and image correlation has allowed dynamic Brazilian tests to be carried out using the split Hopkinson pressure bar (SHPB) on PBS9501, an explosive simulant. The essential features of low-rate Brazilian tests
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dea64a89fa7b094272cadd0e99cdda72
http://ora.ox.ac.uk/objects/uuid:d06b2155-9a74-49a7-8fb0-375becdf3f7c
http://ora.ox.ac.uk/objects/uuid:d06b2155-9a74-49a7-8fb0-375becdf3f7c
Publikováno v:
AIP Conference Proceedings.
Uniaxial loading experiments have been conducted on PBS9501. This material is highly packed, of the order of 94 % by weight, with sugar having a 3:1 granulated to powdered sugar ratio. With the aim of developing a valid optical‐based fracture test
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::520696335969d7023f5efb5650b0cd67
https://doi.org/10.1063/1.1780362
https://doi.org/10.1063/1.1780362
Publikováno v:
SPIE Proceedings.
A method has been developed for visualizing the internal deformation fields in opaque materials during impact events using a combination of flash X-rays and digital speckle analysis. The random speckle pattern required for the digital speckle analysi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07d5fd85a70c42d8635e4f69c9c16799
https://doi.org/10.1117/12.516899
https://doi.org/10.1117/12.516899
Autor:
Stephen G. Grantham, Fredrik Forsberg
Publikováno v:
SPIE Proceedings.
Using X-rays as information carriers it is possible to obtain data about motion inside an object that is opaque to visible light. An image correlation algorithm can be applied to a set of two X-ray images taken sequentially during a process, where th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a22120ff1aedb4ed9be38dd047d6308
https://doi.org/10.1117/12.500493
https://doi.org/10.1117/12.500493
Autor:
Stephen G. Grantham, John E. Field
Publikováno v:
SPIE Proceedings.
Image correlation techniques developed for speckle metrology have recently been applied to a wide range of ballistics and explosives studies at the Cavendish Laboratory. White-light image correlation applied to quasi-static testing of explosives, at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c73d11ac8fdeb008ef643d1b734879a
https://doi.org/10.1117/12.516571
https://doi.org/10.1117/12.516571
Autor:
William G. Proud, S. M. Walley, M. W. Greenaway, Stephen G. Grantham, Clive R. Siviour, J. E. Balzer, M. J. Gifford, J. E. Field
Publikováno v:
MRS Proceedings. 800
This paper reviews the techniques that have been developed at the Cavendish Laboratory for the study of the mechanical and ignition properties of energetic materials.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06ac3a5aeaffd01786d04e890397b65e
https://doi.org/10.1557/proc-800-aa5.4
https://doi.org/10.1557/proc-800-aa5.4