| 2006 №03 (04) | 2006 №03 (06) |
The Paton Welding Journal, 2006, #3, 22-26 pages
Modelling of the shock wave process in local pulsed treatment of plane samples using ring charges
B.I. Palamarchuk, N.A. Pashchin, A.T. Malakhov, A.V. Cherkashin, A.N. Manchenko, A.A. Chajka
E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
Considered are the peculiarities of arresting the propagation of a fatigue crack through forming the field of compressive stresses and plastic strains in the vicinity of the crack using a pulsed explosive impact, involving focusing of energy in the crack location zone. The Neumann-Richtmyer method of end-to-end counting using artificial viscosity was employed to model shock waves in explosive loading of materials. Modelling of the shock wave (SW) process allows prediction of parameters of the pulsed impact on materials, which makes it easier to evaluate the effect on them by the density of explosive materials, explosion energy and damping interlayers. For complex schemes of pulsed loading of materials, the SW effect parameters can be directly measured using the developed electret pressure sensors.
Keywords: shock wave treatment, structural steels, stressed state, numerical modelling, wave pressure, experimental procedure
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