MODEL FOR DELAMINATION PROPAGATION IN MULTILAYERED MATERIALS AT 0 /θ O INTERFACES: A COMPARISON BETWEEN EXPERIMENTAL AND FINITE ELEMENTS STRAIN ENERGY RELEASE RATES

A Lerpiniere (1) , Jean-François Caron (1) , A Diaz Diaz (2) , Karam Sab (1)

1 navier umr 8205 - Laboratoire Navier
2 CIMAV - Centro de Investigación en Materiales Avanzados

Multilayered delaminated plates are analyzed here using an 2D plate model. Alternative to the existing three-dimensional finite element methods (3D-FEM), the proposed model, named LS1, is a layerwise stress model proving significantly less computationally expensive while accurate and efficient [see 1, 2, 3, 4, 5]. In particular this paper uses experimental data from different test specimens (DCB, ELS, ADCB, MMF) in a finite element code, which is based on LS1, in order to calculate strain energy release rates (SERR) in different modes of delamination. The focus is on two types of delaminated interfaces 0/0 and 0/45. The obtained SERR results are in very good agreement with the experimental values and, in the case of mixed-mode delamination, they are as accurate as the SERR obtained by 3D-FE models. The other interesting property of the LS1 model is the very fast calculation speed as the SERR can be analytically deduced from interfacial stresses. This relation which only depends on the stacking sequence and the position of delamination is presented.

Mots clés: Multilayer; Layerwise model; strain energy relase rate; Interlaminar stresses

Domaines: Mécanique des matériaux [physics.class-ph]

A Lerpiniere, Jean-François Caron, A Diaz Diaz, Karam Sab. MODEL FOR DELAMINATION PROPAGATION IN MULTILAYERED MATERIALS AT 0 /θ O INTERFACES: A COMPARISON BETWEEN EXPERIMENTAL AND FINITE ELEMENTS STRAIN ENERGY RELEASE RATES. ECCM-16TH EUROPEAN CONFERENCE ON COMPOSITE MATERIALS,, Jun 2014, Seville, France. ⟨hal-01133134⟩