例11 -拉伸试验：（Example 11 - Tensile Test - altairuniversity.com）.pdf

Example 11 - Tensile Test Summary The material characterization of ductile aluminum alloy is studied. The RADIOSS material laws 2, 27 and 36 are used to reproduce the experimental data of a traction test by simulation. The work-hardening, damage and rupture of the specimen are simulated by a finite element model. The parameters of the material laws are determined to fit the experimental results. The influence of the strain rate is also studied. A strain rate filtering method is used to reduce the effect of a dynamic resolution on the simulation results.  Law characterization  Strain rate effect 1 Law Characterization Title Law characterization Number 11.1 Brief Description Elasto-plastic material law characterization using a tensile test. Keywords • Shell element • Johnson-Cook elasto-plastic model (/MAT/LAW2) • Tabulated elasto-plastic (/MAT/LAW36) • Elasto-plastic brittle (/MAT/LAW27) • Necking point, damage model, maximum stress, failure plastic strain RADIOSS Options • Boundary conditions (/BCS) • Imposed velocities (/IMPVEL) • Material definition (/MAT) Compared to / Validation Method • Experimental results Input File Law_2_Johnson_Cook: <install_directory>/demos/hwsolvers/radioss/11_Tensile_test/Law_2_Johnson- Cook/ .../TENSIL2* Law 27_Damage: <install_directory>/demos/hwsolvers/radioss/11_Tensile_test/Law_27_Damage/DAMA GE* Law_36_Tabulated: <install_directory>/demos/hwsolvers/radioss/11_Tensile_test/Law_36_Tabulated/T ENSI36* RADIOSS Version 44q Technical / Theoretical Level Advanced 2 Overview Aim of the Problem It is not always easy to characterize a material law for transient analysis using the experimental results of a tensile test. The purpose of this example is to introduce a method for characterizing the most commonly used RADIOSS material laws for modeling elasto-plastic mater