کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
783795 1465014 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An energy-based approach for analysis of dynamic plastic deformation of metals
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
An energy-based approach for analysis of dynamic plastic deformation of metals
چکیده انگلیسی

An energy-based ordinary differential equation is derived for a plastic wave propagating through a Taylor impact test specimen. Using the definition of true strain, an analytical equation is presented to calculate the strain rate across the plastic wave front. Having considered a Johnson–Cook plasticity model for the projectile material, the derived energy equation accompanied by a governing kinematics relation and the strain rate equation is numerically integrated to obtain the final deformed profile of the specimen. The results of the energy based model are then compared with those of the commonly used momentum-based approach as well as the existing experimental data in literature for copper, aluminum and steel specimens. Moreover, the entire plastic profile of the specimens obtained from energy and momentum approach is compared with 3D finite element results. It can be concluded that the energy-based model exhibits a closer agreement with experiment and simulation.


► An energy approach is proposed for analysis of wave propagation within Taylor test specimen.
► An analytical equation is derived to calculate strain rate across the plastic wave front.
► The energy approach yields results closer to experiment and finite element simulation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mechanical Sciences - Volume 66, January 2013, Pages 94–100
نویسندگان
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