Modeling 1100-0 aluminum over a wide range of temperatures and strain rates
作者： Y PAO , A GILAT
DOI: 10.1016/0749-6419(89)90029-6
关键词: Stress–strain curve 、 Hardening (metallurgy) 、 Deformation (engineering) 、 Viscoplasticity 、 Strain rate 、 Plasticity 、 Dislocation 、 Forensic engineering 、 Materials science 、 Mechanics 、 Constitutive equation
摘要: Abstract The constitutive formulation of Perzyna for viscoplastic deformation, combined with the theory thermally activated motion dislocations is used to model plastic deformation 1100-0 aluminum. parameters are derived from results uniaxial stress experiments at a wide range temperatures and strain rates. Different mechanisms assumed dominate dislocation low high temperatures. Hardening taken be function either or work. When work used, rate history effects observed in incremental tests predicted by theory. To examine its validity, also one dimensional analysis elastic-plastic waves. In application symmetrical bar impact Bell, calculated wave profiles agreement measurements.
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