Chebotnyagin L. M., Potapov V. V. Vliyanie konstruktsii elektrovzryvnogo kartridzha na profil' metallicheskoi truby pri skorostnom deformirovanii impul'snym davleniem [The effect of the electroexplosive cartidge design on the profile of a metal pipe at high-speed deformation by pulse pressure]. Sovremennye tekhnologii. Sistemnyi analiz. Modelirovanie [Modern Technologies. System Analysis. Modeling], 2019. Vol. 63, No. 3, pp. 13–22. DOI: 10.26731/1813-9108.2019.3(63).13–22
10.26731/1813-9108.2019.3(63).13–22
The article presents the results of a computational-experimental study of the effect of the thickness of the end frontal parts of an electroexplosive cartridge on the profile of a metal pipe during deformation by a pulse pressure generated by a plasma expanding channel of an electric spark initiated by an electrical explosion of a wire. Calculation and experimental studies are based on the analysis of pipe profiles under high-speed deformation by pulse pressure and analytical studies on the mechanics of acoustic wave propagation in transmitting media. Using the acousto-electrowave model proposed by the authors and based on the analogy of the propagation of pulsed pressure waves in transmitting media and pulsed voltage waves in electric lines with distributed parameters, calculations were performed that made it possible to reveal the dependence of the final profile of the pipe when it was deformed by pulsed pressure from the design of an electroexplosive cartridge. The calculations show the presence of a significant dependence of the pipe profile on the thickness of the end frontal parts of an electroexplosive cartridge. It is shown that with an increase in the thickness of the end frontal parts of an electroexplosive cartridge, the profile of the pipe becomes equal (becomes flatter) during high-speed deformation. Thus, by changing the thickness of the end frontal parts of an electroexplosive cartridge, you can adjust the parameters of the impact of the deformable pipe surface with the surface of the workpiece opening, which allows you to improve the quality of rolling and increase the likelihood of obtaining a welded joint between the surfaces during repair and manufacturing of the "pipe – tube sheet" heat exchanger assembly.
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