MECHANICAL MODELS OF THE BEHAVIOUR OF PLASTIC MATERIALS: INFLUENCE OF TIME AND TEMPERATURE

Authors

  • MASSIMILLIANO AVALLE POLITECNICO DI TORINO, II FACOLTA' DI INGEGNERIA, VERCELLI, TORINO
  • MARCO PERONI POLITECNICO DI TORINO DIPARTIMENTO DI MECCANICA
  • ALESSANDRO SCATTINA POLITECNICO DI TORINO DIPARTIMENTO DI MECCANICA

Keywords:

PLASTIC MATERIALS DESIGN, MECHANICAL MODELS

Abstract

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.

Author Biographies

MARCO PERONI, POLITECNICO DI TORINO DIPARTIMENTO DI MECCANICA

RESEARCH FELLOW

ALESSANDRO SCATTINA, POLITECNICO DI TORINO DIPARTIMENTO DI MECCANICA

RESEARCH FELLOW

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Published

2010-03-13

Issue

Vol. 7 No. 1 (2010)

Section

Articles

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