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Item Information   Holdings       More by this author     Schultz, Joshua Adam     Subjects     Glass construction     Safety glass     Strains and stresses     Engineering design -- Data processing     Structural analysis (Engineering)     MSST Project.     Browse Catalog     by author:      Schultz, Joshua Adam       by title:      Design of fully temp...         MARC Display

Design of fully tempered monolithic structural glass with point supports based on ultimate stresses and stress distributions / Joshua Adam Schultz. by Schultz, Joshua Adam Subjects Glass construction   Safety glass   Strains and stresses   Engineering design -- Data processing   Structural analysis (Engineering)   MSST Project. Description:  79 leaves : ill. ; 29 cm. Contents:  Thesis advisor: Dr. Douglas Stahl Committee members: Dr. Richard DeVries, Dr. Hans-Peter Huttelmaier Existing structural glass applications -- Existing method of glass design -- Design challenges -- Goals of research -- Manufacture and properties of fully tempered glass -- Annealed glass properties and design approaches -- Specimens for testing -- Connection hardware -- Strain gauges -- Loading and boundary conditions -- Load duration -- Experimental procedure -- Experimental results -- Finite element analysis: theory and software -- Element type -- Element order: linear and quadratic elements -- Reduced and non-reduced integration -- Boundary conditions -- Mesh -- Summary of FEA models and results -- Concept -- Beam theory field stress calculations -- Plate theory field stress calculations -- Stress concentrations factor: Goodier -- Stress concentration factor: Savin -- Summary of applications and limitations -- Deflections. This paper investigates stresses in a typical application of fully tempered glass as a point supported structural balustrade. Loadings are defined by building codes, but literature on strength or other limit states for tempered glass in this application is limited. The paper compares finite element analysis, equations from plate theory, and test results. The goal of the paper is to establish an accurate and efficient method of design that uses a manual calculation to select a preliminary design thickness and employs the calibrated finite element method for the final design. The experimental results serve as a baseline against which the finite element models are compared in order to determine accuracy. Experimental strain data is gathered from six fully tempered, monolithic glass balusters loaded to both service and ultimate conditions. Strain and deflections are measured and used to select the finite element model which most accurately idealizes the test results.The effect of element type, integration schemes and boundary conditions on finite element analysis results and computational processing time are compared, leading to the conclusion that for this application the model with solid linear elements and "pinned" boundary conditions provide the best results. Consideration of plate theory, including the effects of stress concentrations, results in an equation for field stresses and adjustment factors for stresses in glass and around holes. The resulting calculation provides maximum stresses based on plate thickness which compares favorably with the linear finite element results. Experimental, finite element and manual results all show that the stresses at a 200 lb load are approximately 8,000 psi and about 24,000 psi at failure. These test results calibrate the finite element and plate theory predictions and suggest a design procedure.   Copy/Holding information Location Collection Call No. Status   Walter Schroeder Library Master's Theses AC805 .S3779 2009 Available Add Copy to MyList Format: HTMLPlain textDelimited Subject:   Email to:

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