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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Erosion of metals by pulsating water jet
 Klich, Jiří ; Foldyna, Josef ; Hlaváček, Petr ; Zeleňák, M. ; Ščučka, Jiří
The aim of the paper was to determine erosion effects of pulsating water jet impinging the surface of metal sample. The influence of repeated impacts of water pulses and impact velocity (operating pressure) on the erosion of metal surface was investigated. The development of erosion pattern with respect to number of impacts was analysed and discussed. It was found that erosion caused by repeated impacts of water pulses occurs in three stages. The stage of erosion of the surface can be determined by the behaviour of surface characteristics (such as Ra and Rz with respect to number of impacts of pulsating water jet.
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Dynamic model of a repeated impact in the wheel-rail system
 Valeš, František ; Červ, Jan ; Adámek, V.
Full dynamic response of a wheel-rail system undergoing impact is presented in the paper. The solution is based on the finite element approach. Modelling of wave motion in the considered system was carried out with the aid of the finite element codes MSC MARC and DYNA.
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