Laminated glass: Dynamic of rupture of adhesion

P. Elzière, M. Ciccotti, E. Barthel, C. Dalle-Ferrier

Context

Laminated glass is widely used for safety devices in buildings and vehicles. It is made of two glass plates and a polymeric interlayer which gives its resistance to impact to the structure.

We want to understand, the relation between adhesion and the mechanical behavior of the interlayer leading to the high impact resistance of the structure.

Our work

In the main phase of dynamic rupture, glass parts are driving away from each other while stretching the delaminated interlayer in between. The delamination front position and the force to delaminate measurements show different zones of energy dissipation.

We carry on an extensive study of the interlayer mechanical behavior at both small and large strains. Thehighly non linear hyperelastic behavior whose time dependence and dissipation energy might be due to inter-chain hydrogen bonds. This behavior can be related to the ahdesion properties to explain the large amount of dissipated energy during the delamination.

We also perform local measurement close to the delamination fronts (digital image correlation and birefringence measurements) coupled to finite element models will enable us to understand the relation between the crack front behavior and the far field state of the interlayer.