Behavior of dynamic material Q355B steel based on the Johnson-Cook model

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (18) : 231-237.

LIN Li1,2,HUANG Bo1,XIAO Xinke3,ZHU Yu1,XU Tianli2

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Abstract

As a substitute of Q345 steel, Q355 steel will be largely applied in construction engineering. Due to the demand of structural engineering for shock and explosion, the research on the dynamic material behavior of it is urgent and necessary. Research on the mechanical properties of Q355B steel at different temperatures, stain rate and stain condition were investigated using universal testing machine and split Hopkinson pressure bar system. It was found that plastic flow stress nonlinearly was decreased and fracture stain nonlinearly was increased with the increase of temperature. Then, modified Johnson-Cook constitutive relation and fracture criteria were calibrated respectively by using test results and numerical simulations. Finally, Taylor impact test was carried out to verify the validity of MJC model and its parameter values.

Key words

Q355B steel / Johnson-Cook model / Q355B Steel / dynamic mechanical properties / Taylor impact test

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LIN Li1,2,HUANG Bo1,XIAO Xinke3,ZHU Yu1,XU Tianli2. Behavior of dynamic material Q355B steel based on the Johnson-Cook model[J]. Journal of Vibration and Shock, 2020, 39(18): 231-237

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