Recueil de mécanique
Volume 4, Numéro 2, Pages 374-381
2020-04-07

Numerical Analysis Of Ductile Failure Of Polymers Materials: Case Of Polyvinyldifluoride, Pvdf



Auteurs : Benhamena Ali . Benaoum Fatima . Baltach Abdelghani . Drai Ahmed . Khelil Foudil .

Résumé

The aim of this work is to make a contribution to study the ductile failure of polymers materials (Polyvinyldifluoride, PVDF) using the concepts of the local approach in fracture mechanics. The numerical simulation with the Ansys finite element code was carried out using a micromechanical model based on the local approach in order to study the ductile failure of polymers: the Gurson-Tvergaard-Needleman model; GTN. The validation of this finite element model was carried out using the experimental results. The GTN model faithfully reproduces the macroscopic mechanical behavior of the PVDF material in terms of stress versus strain at different level of temperature. The sensitivity of the PVDF mechanical behavior to some parameter such as: effect of triaxiality of stresses, temperature and hydrostatic pressure were examined. Secondly, the application of the elastoplastic fracture mechanics based on the determination of the J integral is used in order to study the fracture behavior of PVDF and its sensitivity to rise of level of temperature.

Mots clés

PVDF polymer; triaxiality; temperature; hydrostatic pressure; GTN; MEF; J Integral ; arc-shaped specimen: CTPB ; PVDF polymer; triaxiality; temperature; hydrostatic pressure; GTN; MEF; J Integral ; arc-shaped specimen: CTPB ; ; GTN; MEF; J Integral ; arc-shaped specimen: CTPB ; PVDF polymer ; triaxiality ; temperature ; hydrostatic pressure ; GTN ; MEF ; J Integral ; arc-shaped specimen: CTPB

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