FORMATION OF A PROBING VOLTAGE PULSE IN A METAL ROD BY PULSE IRRADIATION OF THE END SURFACE
DOI:
https://doi.org/10.15407/dopovidi2024.06.031Keywords:
thermal pulse, stress pulse, coupled thermomechanical behavior, thermoviscoplastic material, metal rodAbstract
Within the framework of coupled thermomechanics using a thermodynamically consistent model of nonlinear material behavior, the possibility of generating a probing voltage pulse in a metal rod by irradiating its end with a laser pulse or an electron beam pulse is investigated. The dynamic problem is solved numerically using finite ele- ment methodology developed for modeling the coupled thermomechanical behavior of physically nonlinear mate- rials, taking into account the temperature dependence of material properties. The effect of thermal momentum is modeled by specifying the heat flux through the body boundary. The interrelated thermomechanical processes in the irradiated region and along the rod length, the characteristics of the generated voltage pulse, and the processes of pulse propagation along the rod are studied. Special attention is paid to the propagation of the probing voltage pulse and the temperature change accompanying this pulse. The relationship between the parameters of the excita- tion thermal pulse and the probing voltage pulse is established.
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