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Numerical simulation of low-velocity impact loading of a ductile polymer material

Abstract

Mechanical impact loading of injection-moulded components was simulated. The material was a talc-filled and elastomer-modified polypropylene used in automotive exterior parts. The material model was the linear-elastic–viscoplastic SAMP-1 model, which features pressure-dependent yield stress, plastic dilatation and a simple damage model. The model was calibrated with data from tests in uniaxial tension, shear and uniaxial compression, utilising 3D digital image correlation for full-field displacement measurements. With the calibrated model, two load cases were simulated; centrally loaded clamped plates and three-point bending of bars. The predictions of force vs. deflection were good to fair. The results are discussed in terms of deficiencies of the calibration data, heterogeneity and anisotropy of injection-moulded components, and shortcomings of the model. In particular, the hardening curves at high strain rates are uncertain, and tests in biaxial tension would be useful.

Category

Academic article

Language

English

Author(s)

  • Hamid Daiyan
  • Frode Grytten
  • Erik Andreassen
  • Harald Osnes
  • Ole Vidar Lyngstad

Affiliation

  • SINTEF Industry
  • SINTEF Industry / Materials and Nanotechnology
  • University of Oslo
  • Diverse norske bedrifter og organisasjoner

Year

2012

Published in

Materials & Design

ISSN

0261-3069

Volume

42

Page(s)

450 - 458

View this publication at Cristin