CINECA IRIS Institutial Research Information System (University of Genoa) · 2010 · 10 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceAutomotive MaterialsMechanical Behavior Of MaterialsThermal AnalysisCreep BehaviorCreep DeformationPlastic DeformationPlasticityStrain Rate EffectsStress-strain BehaviorCreep SimulationCreep Under Thermal LoadingDynamic LoadingDynamic Mechanical LoadingNonlinear PlasticityPlastic Deformation SimulationPlastic Stress-strain RelationshipStrain-rate Dependence
MODELLING THE MECHANICAL BEHAVIOUR OF PLASTICS IN THE SIMULATION OF PHENOMENA INVOLVING LARGE STRAINS AND LARGE DISPLACEMENTS, AS IN CRASH SIMULATIONS, IS A COMPLEX TASK DUE TO THE HIGHLY NON-LINEAR CHARACTERISTICS OF THESE MATERIALS. MOREOVER, NON NEGLIGIBLE INFLUENCES OF STRAIN-RATE, MULTIAXIAL LOADING, AND TEMPERATURE ARE PRESENT AND MUST BE TAKEN INTO ACCOUNT ACCORDINGLY. THIS WORK PRESENTS SOME RESULTS ABOUT THE MODELLING OF THESE EFFECTS FOR A THERMOPLASTIC USED IN AUTOMOTIVE COMPONENTS. THE MODEL WAS DEVELOPED BASED ON EXPERIMENTAL RESULTS OBTAINED IN DIFFERENT LOADING CONDITIONS, WITH DIFFERENT TEMPERATURE AND STRAIN-RATE. THE TIME FACTOR WAS INVESTIGATED BOTH IN SHORT TERM LOADING (DYNAMIC LOADING) AND LONG TERM TESTS (CREEP LOADING). BOTH THESE LOADING CASES ARE VERY IMPORTANT IN PLASTIC PARTS DESIGN.