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National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Non destructive observation of damage processes by X-Ray dynamic defectoscopy
 Vavřík, Daniel ; Jakůbek, J. ; Pospíšil, S. ; Visschers, J. ; Zemánková, Jaroslava
The subject of this work is experimental observation of the development of internal damage and its evolution in aluminium alloy flat specimens with different configurations of the pre crack. We propose direct and non-destructive observation of the material damage evolution by measuring changes in transmission of X-rays penetrating a stressed material, using a single photon counting X-ray imager, called Medipix 1.
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Resolution and stability tests of Medipix-1 pixel detector for X-ray dynamic defectoscopy
 Jakubek, J. ; Vavřík, Daniel ; Pospíšil, S. ; Visschers, J.
The application of the Medipix-1 pixel detector device for directnondestructive observation of damage development in graduallystressed materials by means of X-ray transmission measurements(so called X-Ray Dynamic Defectoscopy -XRDD) has been recentlysuccessfully demonstrated.
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Optical Determination of Constitutive Equations Parametersof Nonlinear Materials
 Vavřík, Daniel ; Korouš, Jan ; Zemánková, Jaroslava ; Jaroš, P.
The paper presents simple optical experimental method fordetermination of constitutive equations parameters ofnonlinear materials. Usually only one extensometer orstrain gauge is used for the determination of strain inloading direction and one for the determination of acontraction in standard tensile test.
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