Hybrid laminated-glass plate: Design and assessment

2013 ◽  
Vol 106 ◽  
pp. 250-263 ◽  
Author(s):  
Paolo Foraboschi
Keyword(s):  
Glass Plate ◽  
Laminated Glass ◽  
Plate Design

scholarly journals Impact Fracture and Fragmentation of Glass via the 3D Combined Finite-Discrete Element Method

2021 ◽  
Vol 11 (6) ◽  
pp. 2484
Author(s):  
Zhou Lei ◽  
Esteban Rougier ◽  
Earl E. Knight ◽  
Mengyan Zang ◽  
Antonio Munjiza
Keyword(s):  
Discrete Element Method ◽  
Automobile Industry ◽  
Glass Plate ◽  
Discrete Element ◽  
Impact Fracture ◽  
Constitutive Relationship ◽  
Laminated Glass ◽  
Fracture Patterns ◽  
Fracture Processes ◽  
Element Method

A driving technical concern for the automobile industry is their assurance that developed windshield products meet Federal safety standards. Besides conducting innumerable glass breakage experiments, product developers also have the option of utilizing numerical approaches that can provide further insight into glass impact breakage, fracture, and fragmentation. The combined finite-discrete element method (FDEM) is one such tool and was used in this study to investigate 3D impact glass fracture processes. To enable this analysis, a generalized traction-separation model, which defines the constitutive relationship between the traction and separation in FDEM cohesive zone models, was introduced. The mechanical responses of a laminated glass and a glass plate under impact were then analyzed. For laminated glass, an impact fracture process was investigated and results were compared against corresponding experiments. Correspondingly, two glass plate impact fracture patterns, i.e., concentric fractures and radial fractures, were simulated. The results show that for both cases, FDEM simulated fracture processes and fracture patterns are in good agreement with the experimental observations. The work demonstrates that FDEM is an effective tool for modeling of fracture and fragmentation in glass.

Effect of Delamination on the Strength of Laminated Glass Plate Structures

2014 ◽  
Vol 487 ◽  
pp. 181-184 ◽  
Author(s):  
M. Zülfü Aşık ◽  
Ebru Dural
Keyword(s):  
Large Deflection ◽  
Glass Plate ◽  
Polyvinyl Butyral ◽  
Laminated Glass ◽  
Plate Structures ◽  
Order Difference ◽  
Deflection Analysis ◽  
History Of ◽  
Glass Unit

Laminated glass which consists of two glass sheets connected to each other with PVB interlayer is used in many engineering applications for years. Despite the long history of the use of laminated glass in buildings there are serious problems about delamination of laminated glass units. This paper provides information about delamination issues of laminated glass plate structures. Delamination of laminated glass unit may be due to the thinning of PVB (Polyvinyl Butyral) interlayer or the folds which occur during the manufacturing process. Laminated glass behaves in a complex manner due to the effect of geometry that undergoes large deflection even under their own weight and the order difference between the elastic modulus of glass and interlayer. Because of the mentioned reasons large deflection analysis has to be performed in the determination of the effect of delamination on the strength of laminated glasses.

Inter-facial shear effects of ultra-thin film on laminated glass plate dynamical behaviour

2008 ◽  
Vol 222 (8) ◽  
pp. 1421-1433 ◽  
Author(s):  
A Akrout ◽  
L Hammami ◽  
M B Tahar ◽  
M Haddar
Keyword(s):  
Thin Film ◽  
Dynamic Model ◽  
Glass Plate ◽  
Dynamical Behaviour ◽  
Orthotropic Materials ◽  
Laminated Glass ◽  
Fe Model ◽  
Laminated Plate ◽  
Film Stiffness ◽  
Ultra Thin Film

This paper deals with a numerical investigation for the analysis of a laminated glass plate composed of two elastic skins joined with an adhesive ultra-thin film. Hence, a new dynamic model of laminated glass is developed using the Kirchhoff plate theory and taking into account the shear stress at the two skin's interface. The formulation is based on the theory that introduces a specific behaviour law for an ultra-thin film that expresses the discontinuity of displacements at the interface. Besides, the dynamic model is established in an appropriate dimensionless form including the effects of ultra-thin film stiffness and without taking into account the film thickness. The finite-element (FE) method is used for the discretization of the energy functional, which gives a linear matrix system after minimization. A modal approach is adopted to investigate the laminated glass vibratory behaviour. The eigenmodes of the laminated plate are determined. Dynamic response is then obtained by modal recombination. The validation of the new laminate FE model is achieved by comparing the laminated plate results with data obtained from the literature. Numerical results show the reduced vibration's amplitude of a laminated glass plate with ultra-thin film when compared with the one that did not take into account the shear inter-facial stress for the two cases of isotropic and orthotropic materials. Also, the influence of the ultra-thin film stiffness on the dynamical behaviour of the structure is presented and analysed.

Structural Optimization of Laminated Glass Plate Using Discrete Element Method

2015 ◽  
Vol 1088 ◽  
pp. 716-720 ◽  
Author(s):  
Shinobu Sakai ◽  
Kensuke Maenaka ◽  
Koetsu Yamazaki
Keyword(s):  
Tensile Strength ◽  
Discrete Element Method ◽  
Adhesive Strength ◽  
Fracture Behavior ◽  
Glass Plate ◽  
Discrete Element ◽  
Impact Fracture ◽  
Laminated Glass ◽  
Impact Fracture Behavior ◽  
The Impact

Laminated glass is widely used to enhance structural functions. The impact fracture behavior of laminated glass is more complicated than that of single glass, because of the combined influences of the large deformation and delamination strengths. In this study, the impact fracture behavior of a laminated glass plate intended for the outside surface of a modern building has been studied by numerical simulations and experiments. This fracture simulation was calculated using a Discrete Element Method (DEM) based on non-continuum mechanics. The laminated glass structures have been optimized for attaining maximum durability against impact fracture based on the response surface method. In the optimum problem, the tensile strength of the interlayer and the adhesive strength between two pieces of glass and the interlayer are taken as the design variables. From the results of the optimization, it has been observed that the laminated glass difficult to break in the case that the tensile strength was high and that the adhesive strength was a little light. The penetration performance of an optimized laminated glass plate was noticeably better in comparison with a commercial laminated glass plate.

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