Results 241 to 250 of about 144,009 (274)

A study on the effect of various process parameters on low pulsed energy of laser shock peening without ablative layer on the mechanical behavior of AA 7075 T651

Surface Topography: Metrology and Properties, 2022
Abstract Laser shock peening is a well-known surface treatment process that dominates other modern surface treatment processes. Though several materials are investigated to enhance mechanical properties by LSP treatment, only a scarce number of studies have concentrated on Low Pulsed Laser Shock Peening (LPLSP) without an ablative layer ...
M Premnath, R Muruganandhan, M Abeens
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Influence of energy parameters of shock pulse generator on the pipe penetration velocity in soil

Journal of Mining Science, 2014
In the context of the problem of increase in efficiency of vibro-percussion driving of steel pipes in soil, a pilot model of shock generator with step speed adjustment for the bit and anvil impact is described. The authors report experimental modeling of pipe penetration depending on load of stalk.
I. V. Tishchenko, V. V. Chervov
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Action of the Pulses of Shock Waves on the Structure and Superconducting Parameters of MgB2 Tapes

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques, 2018
The possibility of increasing the critical current of MgB2 tapes containing carbon and oxygen additives under the action of shock waves produced by pulsed plasma in a Plasma Focus setup is demonstrated. The microstructure of the tapes and the chemical composition of superconducting layers in the initial state and after impact at different distances ...
B. P. Mikhailov, V. Ya. Nikulin, A. B. Mikhailova, P. V. Silin, I. V. Borovitskaya, S. V. Shavkin, A. A. Serov   +6 more
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A nonlinear dynamic model and parameters identification method for predicting the shock pulse of rubber waveform generator

International Journal of Impact Engineering, 2018
Abstract This paper proposed a highly accurate nonlinear dynamic model and parameters identification method to predict the shock pulses generated by rubber waveform generator (RWG) used in shock test. The establishment of the model is based on the primary results of the Duffing equation, Pan-Yang model and empirical stiffness formulae of cylindrical ...
Jingjing Wen, Chengwu Liu, Houpu Yao, Bin Wu   +3 more
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Investigation the effect of laser ablation parameters in a liquid in order to reduce the pulse energy during laser shock peening

Optical and Quantum Electronics, 2020
The features of laser shock peening technology was studied in relation to the physical processes occurring during and after laser treatment. The effect of laser parameters on the results of the process was investigated. It was shown that the reduce of the diameter of the laser spot while maintaining the intensity leads to a decrease in the effect of ...
I. Shiganov, D. Melnikov, A. Misyurov, M. Melnikova, D. Shtereveria, Zawye Myat   +5 more
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Influence of temporal and energetic laser-pulse characteristics on the parameters of shock waves generated in materials

SPIE Proceedings, 2005
The results of experimental studies on shock wave propagation in plexiglass are discussed. The wave was generated by a single laser pulse of 3 ns and 30 ns duration and of energy from 2 to 30 J. The characteristics of velocity variations of shock wave front propagation are presented in this paper.
Jan A. Owsik, Jacek Janucki, Karol Jach, Robert Swierczynski   +3 more
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Evaluation of Synchronous Twin Pulse Technique for Shock Wave Lithotripsy: Determination of Optimal Parameters for In Vitro Stone Fragmentation

Journal of Urology, 2003
The Twinheads extracorporeal shock wave lithotriptor (THSWL) is composed of 2 identical shock wave generators and reflectors. One reflector is under the table and the other is over the table with a variable angle between the axes of the 2 reflectors. The 2 reflectors share a common second focal point, making it possible to deliver an almost synchronous
Khaled Z, Sheir, Nasim, Zabihi, David, Lee, Joel M, Teichman, Jamil, Rehman, Chandru P, Sundaram, Dirk, Heimbach, Albrecht, Hesse, Fernado, Delvecchio, Pei, Zhong, Glenn M, Preminger, Ralph V, Clayman   +11 more
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Investigation on the parameter determination and implementation of a dual-pulse shock test machine using a MR damper

Journal of Mechanical Science and Technology, 2016
The characteristics of a dual-pulse shock caused by an UNDEX (underwater explosion) are described through many standards. Shock signals required to evaluate the survivability of equipment by a shock test machine are also described. To generate various types of shock signals described in the standard, Shock test machines (STMs) require adjustment to ...
Tae Hyeong Kim, Jong Soo Bae, Chang Won Shul   +2 more
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Structure and parameters of the shock-wave region in a pulsed supersonic flow of metal plasma striking a flat surface

Journal of Applied Spectroscopy, 1982
i. C. Corliss and W. Boseman, Transition Probabilities and Oscillator Strengths for 70 Elements [Russian translation], Mir, Moscow (1968), pp~ 478-493. 2. A.N. Kuchenev and Yu. M. Smirnov~ '~Excitation cross sections of the niobium atom," Zh. Prikl~ Spektrosk., 36, No. 2, 188-193 (1982). 3. V.V.
A. P. Burmakov, V. A. Zaikov, A. V. Kolesnik, G. M. Novik   +3 more
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Pulse Applications and Parameter Identification for U.S. Navy Medium- Weight Shock Machine

1977
Abstract : The scope of this study covers the following two objectives: Provide the design for a mechanical-force pulse generator, specify associated hydraulic power unit and controls, and provide pulse-train profiles and mandrels; and Perform an exploratory parametric identification study of U.S.
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