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The Direct Impact Method for Studying Dynamic Behavior of ‎Viscoplastic Materials

عنوان مقاله: The Direct Impact Method for Studying Dynamic Behavior of ‎Viscoplastic Materials
شناسه ملی مقاله: JR_JACM-8-2_017
منتشر شده در در سال 1401
مشخصات نویسندگان مقاله:

Artem Basalin - National Research Lobachevsky State University of Nizhny Novgorod, ۲۳ Gagarin Avenue, building ۶, Nizhny Novgorod ۶۰۳۹۵۰, Russian Federation
Aleksandr Konstantinov - National Research Lobachevsky State University of Nizhny Novgorod, ۲۳ Gagarin Avenue, building ۶, Nizhny Novgorod ۶۰۳۹۵۰, Russian Federation
Leonid Igumnov - National Research Lobachevsky State University of Nizhny Novgorod, ۲۳ Gagarin Avenue, building ۶, Nizhny Novgorod ۶۰۳۹۵۰, Russian Federation
Alexandr Belov - National Research Lobachevsky State University of Nizhny Novgorod, ۲۳ Gagarin Avenue, building ۶, Nizhny Novgorod ۶۰۳۹۵۰, Russian Federation
Anatoliy Bragov - National Research Lobachevsky State University of Nizhny Novgorod, ۲۳ Gagarin Avenue, building ۶, Nizhny Novgorod ۶۰۳۹۵۰, Russian Federation
Victor Eremeev - Department of Mechanics of Materials and Structures, Faculty of Civil and Environmental Engineering, Gdansk University of Technology,‎ ‎۱۱/۱۲ Gabriela Narutowicza Street, Gdansk, ۸۰-۲۳۳, Poland‎

خلاصه مقاله:
This work is devoted to the direct impact method for determining the deformation diagrams of viscoplastic materials at high strain rates. As the conventional Split Hopkinson Pressure Bar method, the direct impact method is based on the measuring bar technique. The description of the experimental scheme and the traditional experimental data proceeding method are given. The description and the results of numerical analysis of the direct impact scheme are presented. A modified procedure for processing experimental information is proposed which allows to expand the area of correct calculation of strains in the specimen according to the experimental data obtained by the direct impact method. As an illustration the deformation diagrams of copper S۱۰۱ and aluminum alloy D۱۶T in the strain rate range from ۱۰۰۰ to ۱۰۰۰۰ s-۱ have been obtained using the Split Hopkinson Pressure Bar method and the direct impact method. The use of the direct impact method made it possible to obtain deformation curves at strain rates an order of magnitude higher than the conventional SHPB method. The range of studied plastic deformations is increased by ۴ times for the case of copper and ۳ times for aluminum alloy.

کلمات کلیدی:
strain rate, measuring bar, plastic deformation, Yield stress, Numerical simulation, substantiation, Experiment

صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1379487/