Sökning: WFRF:(Proud W.)
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Application of digi...
Application of digital speckle photography to flash x-ray studies of internal deformation fields in impact experiments
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- Synnergren, Per (författare)
- Luleå tekniska universitet,Department of Physics and Chemistry of Solids, Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, Madingley Road, United Kingdom;
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- Goldrein, H.T. (författare)
- Department of Physics and Chemistry of Solids, Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, Madingley Road, United Kingdom
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- Proud, W.G. (författare)
- Department of Physics and Chemistry of Solids, Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, Madingley Road, United Kingdom
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(creator_code:org_t)
- 1999
- 1999
- Engelska.
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Ingår i: Applied Optics. - 1559-128X .- 2155-3165. ; 38:19, s. 4030-4036
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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visa färre...
Abstract
Ämnesord
Stäng
- A technique to measure two-dimensional deformation fields of a layer inside materials during dynamic events such as impact experiments is presented. Even optically opaque materials like cement can be evaluated when flash x rays are used. Blocks of polyester and cement were prepared with a layer of x-ray-absorbing lead particles. The specimens were then hit by a 9-mm-diameter steel sphere (ball bearing) fired from a 9-mm-bore gas gun at a velocity of 373.5 3.0 ms 1 . A 30-ns-long x-ray pulse exposed one radiograph before impact; another radiograph was exposed a short time after the impact on the specimen. The two-dimensional displacement field was obtained when the x-ray radiographs were digitized by a conventional flatbed scanner, and a digital speckle photography algorithm was used to calculate the displacements. The flash x-ray technique allowed examination of the deformation at the layer inside the material during failure, thus giving interesting data about the material flow field around the impactor.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
Nyckelord
- Experimentell mekanik
- Experimental Mechanics
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