Phase Field Simulation of Laminated Glass Beam.

Francesco Freddi,Lorenzo Mingazzi

doi:10.3390/ma13143218

Abstract

The complex failure mechanisms of glass laminates under in-plane loading conditions is modelled within the framework of phase-field strategy. Laminated glass is widely used for structural purposes due to its safe post-glass-breakage response. In fact, the combination of several glass plies bonded together with polymeric interlayers allows overcoming the brittleness of the glass and to reach a pseudo-ductile response. Moreover, the post-breakage behaviour of the laminate is strictly correlated by the mechanical properties of the constituents. Ruptures may appear as cracks within the layers or delamination of the bonding interface. The global response of a glass laminate, validated against experimental results taken from the literature, is carried out by investigating a simplified layup of two glass plies connected by cohesive interfaces through an interlayer. Delamination of the adhesive interface is described, and crack patterns within the materials are fully described. Finally, the proposed approach put the basis for future comparisons with results of experimental campaign and real-life applications.

Highlights

IntroductionDue to its brittle behaviour, its safety is compromised in structural applications if a single glass element is used, as a remedy, laminated glass elements, obtained by coupling together multiple glass plies (float, heat treated or tempered) with polymers or resins interlayer, are widely employed
Glass has been employed in many forms of art for centuries
Extensive tests have been conducted on laminated glass, both for in-plane loading [7,8,9,10] and for out-of-plane loading [11,12], showing its pseudo-ductile failure mechanism

Summary

Introduction

Due to its brittle behaviour, its safety is compromised in structural applications if a single glass element is used, as a remedy, laminated glass elements, obtained by coupling together multiple glass plies (float, heat treated or tempered) with polymers or resins interlayer, are widely employed. The failure behaviour of the composite element becomes pseudo-ductile ensuring the safety requirement. A vast amount of literature is devoted to the evaluation of the mechanical response of sound laminated glass, both theoretically [1,2,3] and experimentally [4,5,6]. Extensive tests have been conducted on laminated glass, both for in-plane loading [7,8,9,10] and for out-of-plane loading [11,12], showing its pseudo-ductile failure mechanism

Objectives

Methods

Results

Discussion

Conclusion