Download or read book Modeling Fracture Behavior in Precision Glass Molding written by Gang Liu and published by Apprimus Wissenschaftsverlag. This book was released on 2018-08-21 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: A temperature and strain rates dependent fracture model is developed based on Weibull statistics to quantitatively describe the brittle-ductile transition of glass fracture in precision glass molding process. Under the assistance of FEM simulation, this fracture model can be used to calculate the fracture probability of glass during the precision glass molding process. Meanwhile, the most probable fracture timing, location of fracture initiation and fracture pattern can be also predicted.
Download or read book The Failure Mechanisms of Coated Precision Glass Molding Tools written by Kyriakos Georgiadis and published by Apprimus Wissenschaftsverlag. This book was released on 2015-10-19 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molding tools in precision glass molding fail easily, even with protective thin film coatings applied. In this work, various efficient methods for assessing glass-coating interactions are developed, including a new, automated testing rig. Analysis of the testing results provides a better understanding of these mechanisms and how they are influenced by material properties and process parameters, so that the appropriate measures can be taken to prolong the life of the molding tools.
Download or read book A Methodology to Model the Statistical Fracture Behavior of Acrylic Glasses for Stochastic Simulation written by Marcel Berlinger and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, a methodology is proposed to statistically model the fracture behavior of acrylic glasses for numerical simulation. The aim is to give guidance to users of comparable materials. In detail, the collection of necessary measurement data and their analysis is presented. By applying the model, a stochastic finite-element simulation is performed for a head impact onto an automotive rear-side window made from acrylic glass. Based on the wide spread of the resulting head injury criteria, the relevance of a statistical material characterization for product safety is discussed. Marcel Berlinger studied mechanical engineering at Technische Hochschule Mittelhessen - University of Applied Sciences, and completed his Master's degree in 2017. Since then, he has been a research assistant and doctoral student in the Team of Prof. Dr.-Ing. habil. Stefan Kolling at the Institute of Mechanics and Materials at Technische Hochschule Mittelhessen.
Download or read book Modeling Sticking Force in Compression Glass Molding Systems written by Kyle David Fischbach and published by . This book was released on 2010 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Compression molding of glass is a promising manufacturing process for high precision, low cost glass optical elements. However, the conditions that glass molding processes are performed in are known to cause sticking between the glass work piece and the mold surface. When the glass-mold contact is repeated during heating-cooling cycles, some or all of a glass specimen often remains on a mold surface during de-molding and damages the formally high precision mold surface. In order to decrease the mold sticking and mold damage, mold materials for glass molds need to have high hardness, heat resistance, and chemical stability. Two examples of mold materials include tungsten carbide and silicon. The microstructures of popular mold materials such as WC-Co contain spots of a lower mechanical strength soft cobalt bonding agent that could adhere to the glass under high molding temperatures. To mitigate the problem, a thin layer coating of inert materials such as platinum or diamond like coating is deposited on the mold surface. In this research, two different coatings were applied to both tungsten carbide and silicon wafer substrates and then tested in a real molding environment. A new system was fabricated to test sticking force between the glass pieces and glass molds. Experiments demonstrated processing parameters including the level of compression, the time associated with compression and the time allowed for cooling significantly affected the glass to mold sticking force.
Download or read book Deformation and Fracture Behaviour of Polymer Materials written by Wolfgang Grellmann and published by Springer. This book was released on 2017-07-12 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the most recent advances in the deformation and fracture behaviour of polymer material. It provides deeper insight into related morphology–property correlations of thermoplastics, elastomers and polymer resins. Each chapter of this book gives a comprehensive review of state-of-the-art methods of materials testing and diagnostics, tailored for plastic pipes, films and adhesive systems as well as elastomeric components and others. The investigation of deformation and fracture behaviour using the experimental methods of fracture mechanics has been the subject of intense research during the last decade. In a systematic manner, modern aspects of fracture mechanics in the industrial application of polymers for bridging basic research and industrial development are illustrated by multifarious examples of innovative materials usage. This book will be of value to scientists, engineers and in polymer materials science.
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Textile Technology Digest written by and published by . This book was released on 1944 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deformation and Fracture Behaviour of Polymers written by Wolfgang Grellmann and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an overview of recent advances in the fracture mechanics of polymers, morphology property correlations, hybrid methods for polymer testing and polymer diagnostics, and biocompatible materials and medical prostheses, as well as application examples and limits.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book STAR written by and published by . This book was released on 1973 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Science Technology Index written by and published by . This book was released on 2000 with total page 1688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elastomeric Polymers with High Rate Sensitivity written by Roshdy George S Barsoum and published by William Andrew. This book was released on 2015-07-01 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent investigations into blast-resistant properties of polyureas and other multi-phase polymeric elastomers indicate that they can dissipate broad bands of frequencies such as those encountered in blast events. In this unique book, Elastomeric Polymers with High Rate Sensitivity, Dr. Roshdy Barsoum and expert contributors bring together the cutting-edge testing methodologies, material properties, and critical design data for engineers seeking to deploy this technology. Where conventional methods of resisting blast, shockwave, and penetration are expensive, time-consuming and impractical, high-strain rate elastomeric polymers (HSREP) can be cheaper, quicker, and more easily applied to new and old materials alike. This book aids both military and civilian engineers in a range of applications, from buildings and tunnels to lightweight armor, ships, and aircraft. The book features constitutive models for software developers designing with these advanced polymers, as well as a discussion of the mechanisms of interaction between high-strain rate polymers and other materials. It also thoroughly covers HSREP engineering methods to achieve other unique properties, such as fireproofing. Material properties and design data included to enable engineers to successfully deploy this technology Cheaper, quicker, and more easily implemented than traditional methods of increasing blast and ballistic performance A how-to guide to the engineering of high strain rate elastomeric polymers to achieve other useful properties, such as fireproofing
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 36 (thesis year 1991) a total of 11,024 thesis titles from 23 Canadian and 161 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 36 reports theses submitted in 1991, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Download or read book Composites Industry Abstracts written by and published by . This book was released on 1996 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineered Materials Abstracts written by and published by . This book was released on 1994-02 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
