Abstract
The kinetics of welded butt joint deformation with pulsed loading are studied by means of solving the dynamic elastoplastic problem. It is shown that under pulsed loading conditions free vibrations arise in a welded joint leading to marked variablesign deformation in the stress concentration zone, i.e. the junction of joint reinforcement with the basic metal. It is established that the reduction in welded joint critical strain with pulsed loading in relation to the same parameter with quasistatic loading may occur even in the case of invariance of limiting material ductility to loading (strain) rate. This phenomenon is caused by the presence of free vibrations in the welded joint under pulsed loading conditions.
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