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A fracture criterion of rubber-like materials under plane stress conditions

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2006
auteur(s) Hamdi Adel; Naït Abdelaziz Moussa; Aït Hocine N.; Heuillet P.; Benseddiq Noureddine
journal (abréviation) Polymer Testing (Polymer Test)
volume (numéro) 25 (8)
  
pages 994 – 1005
résumé In this work, we attempt to derive a fracture criterion for filled and unfilled elastomer vulcanizates and thermoplastics from a set of experimental data. Firstly, fracture criteria reported in the literature have been applied to experimental data obtained from tests including various loading modes (simple tension, equal biaxial tension and biaxial tension) and performed on four materials: a natural rubber (NR), a styrene butadiene rubber (SBR), a polyurethane (PU) and a thermoplastic elastomer (TPE). Then, a new failure criterion based on an equivalent elongation concept is proposed. This equivalent elongation seems to be linearly dependent on a given biaxiality ratio n=(ln(λ2b)/ln(λ1b)), which leads to expressing the principal elongations at break as functions of both the biaxiality n and two experimental parameters. Quite good agreement is highlighted when comparing the failure experimental data with the proposed criterion for the tested elastomers.
mots clés Rubber; Finite deformation; Principal logarithmic elongation; Biaxiality ratio; Fracture criterion
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