TECHNICAL MECHANICS
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UDC 539.374: 539.89

Technical mechanics, 2017, 2, 84 - 98

SPECIAL EFFECTS OF BOUNDARY CONDITIONS ON DISTRIBUTION OF ELASTIC-VISCOUS-PLASTIC WAVES INTO BARS MADE FROM DELAYED FLUIDITY MATERIAL

DOI: https://doi.org/10.15407/itm2017.02.084

YA. F. Andrusyk

YA. F. Andrusyk
Institute for Mechanical Engineering and Transport
Ukraine

      Based on an electromechanical model of an ideal elastic-viscous-plastic material with delayed fluidity, the propagation of elastic-viscous-plastic waves through a semi-infinite bar is considered. The problem is solved in the statement when an impact on the end of an unloaded bar imparts a constant velocity to an end section. From the solution of the equations of the dynamic material behavior behind the front wave of delayed fluidity, the material stressed-strained state is measured. In comparison with a limited condition, when a constant force is suddenly applied to the end surface, the behavior of a disturbed region of the bar is specially featured. The possibility of occurring a singular solution of the determining equations with the special features in the form of discontinuity points of the first kind is demonstrated. Such solution describes a strange behavior of the material, the step-by- step motion resembling that in trembling

plastic state, dynamic criterion of plasticity, impact loading, elastic-viscous-plastic wave, delayed fluidity, medium trembling.

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DOI: https://doi.org/10.15407/itm2017.02.084

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