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Dynamic adhesion breaking in laminated glass – effect of interfaces and polymer's rheology

Abstract : Laminated glass is an industrial product designed for safety applications. A polymer interlayer is inserted between two glass plies to provide impact resistance properties to the glazing. Upon impact, this polymer interlayer debonds and deforms between glass fragments:these two coupled mechanisms provide the impact resistance properties. On the “interface” side, we propose an original method to finely tune the adhesion between glass and interlayer in chapter III. The surfaceof the glass is modified with sol-gel chemistry using two silane species. Despite a non-standard deposition method and coatings thickerthan a perfect molecular layer, we demonstrate that adhesion of the polymer interlayer can be tuned via surface chemistry. On the “polymer” side, we decided to change completely the nature of the interlayer, from a viscoelastic to a plastic material. Withthis plastic interlayer, we have evidenced the necessity to modify the interfaces to retrieve a stable delamination behavior. Moreover,concomitant debonding and stretching of this plastic interlayer dissipates less energy due to the localization of energy dissipation close tothe delamination fronts. Still, when viscoelastic processes are activated at the glass transition, we recover dissipation in the entire volume of the interlayer and high potency for impact applications. Last but not least, to try and make a connection between interfaces, polymer rheology and delamination properties in laminated glass,we present a numerical simulation of the crack propagation problem with a steady-state approach. Since the steady-state crack schemeis not implemented in commercial finite-element codes, we propose a strategy coupling FEA and numerical computing softwares. First results in small strains validate the method, which is expected to be extended to rate-dependent non-linear material behaviors in thefuture.
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Submitted on : Tuesday, October 13, 2020 - 3:14:12 PM
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  • HAL Id : tel-02965807, version 1

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Paul Fourton. Dynamic adhesion breaking in laminated glass – effect of interfaces and polymer's rheology. Chemical Physics [physics.chem-ph]. Université Paris sciences et lettres, 2019. English. ⟨NNT : 2019PSLET059⟩. ⟨tel-02965807⟩

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