Adiabatic shear localization in the dynamic punch test, part II: numerical simulations
作者： K.M Roessig , J.J Mason
DOI: 10.1016/S0749-6419(98)00070-9
关键词: Shear (geology) 、 Stress concentration 、 Materials science 、 Strain hardening exponent 、 Strain rate 、 Structural engineering 、 Composite material 、 Titanium alloy 、 Hardening (metallurgy) 、 Shear stress 、 Adiabatic shear band
摘要: Abstract The behavior of 1018 steel, 6061-T6 aluminum, and titanium 6%Al–4%V alloy during the dynamic punch test is investigated using finite element method. Specifically, possibility effects adiabatic shear localization its role in burr formation are examined, comparisons to experimental tests first part this two study made. A maximum stress criterion involving strain rate hardening thermal softening used determine occurrence simulations. It observed that occurs simulations alloy. This material exhibits narrow regions concentrated deformation, satisfied these regions. more widely distributed other metals, same not satisfied. In calculations it seen has a significant effect when compared softening. Also, contact between specimen lost around center operation. loss important as leads higher concentrations at corner dishing blank.
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