Article thumbnail

Polymer behaviour and fracture models in dynamic

By R. Balieu, F. Lauro, B. Bennani, B. Bourel and K. Nakaya

Abstract

A phenomenological small strain model is developed to capture the elastoviscoplastic behaviour of a 20% filled polypropylene. The constitutive model is based on a multiplicative viscoplastic law. The hydrostatic pressure dependency is considered by using the Drucker Prager yield surface. A phenomenological damage model characterised directly by experimental investigation is used to capture the yield degradation during the deformation in tension. The volume variation due to the cavitation phenomenon is captured by using non-associated viscoplasticity. Some experimental tests at different speed loadings are carried out for the parameters identification of the constitutive model. Furthermore, a fracture model which depends on the stress triaxiality and the strain rate is developed in order to model the complete behaviour of the material studied until fracture

Publisher: EDP Sciences
Year: 2012
DOI identifier: 10.1051/epjconf/20122604030
OAI identifier: oai:edpsciences.org:dkey/10.1051/epjconf/20122604030
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://doi.org/10.1051/epjcon... (external link)
  • http://www.epj-conferences.org... (external link)

  • To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.

    Suggested articles