Strain-rate effect on the dynamic behaviours of a rectangular conducting plate
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Date
2014
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Abstract
This paper is concerned with thermo-elasto-plastic dynamic response of a conductive
plate in a magnetic pulse field. The influence of the strain rate effect and the temperature
effect are taken into account for the electromagnetic elasto-plastic dynamic transient
response and deformation of the conductive plate which made of strain-rate sensitive
materials. The Johnson-Cook model is employed to study the strain rate effect and the
temperature effect on the deformation of the plate. Basic governing equations are derived
for electro-magnetic field considering the eddy current. The analysis includes the elastoplastic
transient dynamic response and the heat transfer of a conductive rectangular plate,
and then an appropriate numerical code based on the finite element method to
quantitatively simulate the electro-magneto-elasto-plastic mechanical behaviors of the
conductive rectangular plate. The numerical results indicate that the strain rate effect has
to be considered for the conductive plates, especially for those with high strain rate
sensitivity. Comparison of the influence of the temperature effect on the deformation of the
plate with that of the strain rate effect shows that the influence of the temperature effect
on the deformation of a plate is not significant.
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Keywords
multi-field coupling, strain rate effect, elasto-plastic dynamic response