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Dissertation
Master thesis : State of the art on laminated glass fracture & Fracture analysis of a monolithic glass plate under 4-point bending (Gmsh & Abaqus/Standard/Explicit simulations)
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Year: 2018 Publisher: Liège Université de Liège (ULiège)

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Abstract

Acquiring numerical means in the laminated glass fracture domain is a challenge. Such a composite layout, made of two float glass plates sandwiching a transparent polymeric interlayer, shows indeed quite complex behaviors, differing drastically with respect to the time domain experienced. The first part of the present report details a complete analysis of those phenomena with literature findings and identifies existing material model and brittle fracture methods especially. Beside the explanations, key material parameters for suitable numerical simulations are particularly pointed out.
Among the approaches followed by main brittle fracture methods, 2 families are distinguished:
a continuum one with element erosion and a discrete one with cohesive zone model. As introduction case to fix glass fracture modeling capabilities, comparison between Abaqus/Explicit - Brittle Cracking (continuum) and Gmsh - DG/ECL (discrete) is carried out in the second part of the report. The chosen framework was the monolithic glass plate fracture under 4-point bending.
Unfortunately, difficulties entailed by this choice restricted the analysis because of the software
intrinsic limitations (especially observed for Abaqus). In that sense, comparison with experimental testing was quite unbalanced. However, in combination with traction test simulations on dog-bone shaped glass sample, a clear conclusion can be drawn. In terms of fracture energy and ability to generate relevant glass cracks pattern, Gmsh- DG/ECL stands out particularly, suggesting that a complete match with actual testing could be achieved through a large CPU expense. At the opposite, beside quite poor cracks patterns, Abaqus/Explicit- Brittle Cracking exhibit a large disproportion between captured fracture energy and viscous dissipation (and sometimes hourglass control) to stabilized the numerical scheme.


Book
Current Research in Thin Film Deposition : Applications, Theory, Processing, and Characterisation
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Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Today, thin films are near-ubiquitous and are utilised in a very wide range of industrially and scientifically important areas. These include familiar everyday instances such as anti-reflective coatings on ophthalmic lenses, smartphone optics, photovoltaics, decorative, and tool coatings. A range of somewhat more exotic applications also exists, such as astronomical instrumentation (e.g., ultra-low loss dielectric mirrors and beam splitters in gravitational wave detectors, such as laser interferometer gravitational-wave observatory (LIGO)), gas sensing, medical devices and implants, and accelerator coatings (e.g., coatings for the large hadron collider (LHC), and compact linear collider (CLIC) experiments at European organization for nuclear research (CERN)). This Special Issue will provide a platform for researchers working in any area within this highly diverse field to share and exchange their latest research findings. The Special Issue contains novel studies encompassing material characterisation techniques, a range of thin-film coating deposition processes and applications of such technology.


Book
Current Research in Thin Film Deposition : Applications, Theory, Processing, and Characterisation
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Today, thin films are near-ubiquitous and are utilised in a very wide range of industrially and scientifically important areas. These include familiar everyday instances such as anti-reflective coatings on ophthalmic lenses, smartphone optics, photovoltaics, decorative, and tool coatings. A range of somewhat more exotic applications also exists, such as astronomical instrumentation (e.g., ultra-low loss dielectric mirrors and beam splitters in gravitational wave detectors, such as laser interferometer gravitational-wave observatory (LIGO)), gas sensing, medical devices and implants, and accelerator coatings (e.g., coatings for the large hadron collider (LHC), and compact linear collider (CLIC) experiments at European organization for nuclear research (CERN)). This Special Issue will provide a platform for researchers working in any area within this highly diverse field to share and exchange their latest research findings. The Special Issue contains novel studies encompassing material characterisation techniques, a range of thin-film coating deposition processes and applications of such technology.


Book
Current Research in Thin Film Deposition : Applications, Theory, Processing, and Characterisation
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

Loading...
Export citation

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Bookmark

Abstract

Today, thin films are near-ubiquitous and are utilised in a very wide range of industrially and scientifically important areas. These include familiar everyday instances such as anti-reflective coatings on ophthalmic lenses, smartphone optics, photovoltaics, decorative, and tool coatings. A range of somewhat more exotic applications also exists, such as astronomical instrumentation (e.g., ultra-low loss dielectric mirrors and beam splitters in gravitational wave detectors, such as laser interferometer gravitational-wave observatory (LIGO)), gas sensing, medical devices and implants, and accelerator coatings (e.g., coatings for the large hadron collider (LHC), and compact linear collider (CLIC) experiments at European organization for nuclear research (CERN)). This Special Issue will provide a platform for researchers working in any area within this highly diverse field to share and exchange their latest research findings. The Special Issue contains novel studies encompassing material characterisation techniques, a range of thin-film coating deposition processes and applications of such technology.

Keywords

Technology: general issues --- PECVD --- plasma diagnostics --- nc-Si:H --- RF-PECVD --- Fourier-transform infrared spectroscopy (FTIR) --- quadruple mass spectrometry (QMS) --- optical emission spectroscopy (OES) --- X-ray diffraction spectroscopy (XRD) --- micro hollow glass spheres (MHGS) --- solid micro glass spheres (SMGS) --- liquid phase deposition (LPD) --- aluminum coating --- β-Ga2O3 --- MOCVD --- VI/III ratio --- scandium stabilized zirconia thin films --- e-beam physical vapor deposition --- thin films ceramics --- Raman spectroscopy --- X-ray diffraction --- initiated chemical vapor deposition (iCVD) --- superhydrophobic --- fluoropolymer --- thin film --- atomic layer deposition --- nanomechanics --- Young's modulus --- shear modulus --- resonant frequency --- Q-factor --- microcantilevers --- internal stress --- nickel-chromium --- thin film thermocouples --- physical vapor deposition --- flat film extrusion --- foil quality --- MgF2 --- color center absorption --- density --- crystal frequency --- stress --- adhesion --- polarization controlling --- dual functional-metalens --- focusing --- splitting --- PVD coatings --- nanoindentation --- brittle cracking --- fracture toughness --- diamond coatings --- residual stresses --- interfacial fatigue strength --- annealing --- milling --- PECVD --- plasma diagnostics --- nc-Si:H --- RF-PECVD --- Fourier-transform infrared spectroscopy (FTIR) --- quadruple mass spectrometry (QMS) --- optical emission spectroscopy (OES) --- X-ray diffraction spectroscopy (XRD) --- micro hollow glass spheres (MHGS) --- solid micro glass spheres (SMGS) --- liquid phase deposition (LPD) --- aluminum coating --- β-Ga2O3 --- MOCVD --- VI/III ratio --- scandium stabilized zirconia thin films --- e-beam physical vapor deposition --- thin films ceramics --- Raman spectroscopy --- X-ray diffraction --- initiated chemical vapor deposition (iCVD) --- superhydrophobic --- fluoropolymer --- thin film --- atomic layer deposition --- nanomechanics --- Young's modulus --- shear modulus --- resonant frequency --- Q-factor --- microcantilevers --- internal stress --- nickel-chromium --- thin film thermocouples --- physical vapor deposition --- flat film extrusion --- foil quality --- MgF2 --- color center absorption --- density --- crystal frequency --- stress --- adhesion --- polarization controlling --- dual functional-metalens --- focusing --- splitting --- PVD coatings --- nanoindentation --- brittle cracking --- fracture toughness --- diamond coatings --- residual stresses --- interfacial fatigue strength --- annealing --- milling

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