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 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 Microstructure and Microtribology of Polymer Surfaces written by Vladimir Vasilʹevich T︠S︡ukruk and published by . This book was released on 2000 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents 30 of the 62 papers delivered at an August 1998 international symposium in Boston on the tribology of polymeric materials at both the macroscopic and microscopic scales. They look at some problems that have arisen as the equipment and experimental techniques for microscopic analysis have outdistanced the ability of scientists to model and interpret the results. The overall themes are contact mechanics of polymeric materials, micromechanics and microtribology, surface microstructures of various polymers, and industrial applications. Among the specific topics are the role of interfacial slippage in adhesive release, the experimental study of the friction regimes on viscoelastic materials, sparse coatings by the disperse adsorption of cylindrical brushes, and the effect of surface texture on the friction of automotive interior plastics. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book Current Perspectives and New Directions in Mechanics Modelling and Design of Structural Systems written by Alphose Zingoni and published by CRC Press. This book was released on 2022-09-02 with total page 4438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems comprises 330 papers that were presented at the Eighth International Conference on Structural Engineering, Mechanics and Computation (SEMC 2022, Cape Town, South Africa, 5-7 September 2022). The topics featured may be clustered into six broad categories that span the themes of mechanics, modelling and engineering design: (i) mechanics of materials (elasticity, plasticity, porous media, fracture, fatigue, damage, delamination, viscosity, creep, shrinkage, etc); (ii) mechanics of structures (dynamics, vibration, seismic response, soil-structure interaction, fluid-structure interaction, response to blast and impact, response to fire, structural stability, buckling, collapse behaviour); (iii) numerical modelling and experimental testing (numerical methods, simulation techniques, multi-scale modelling, computational modelling, laboratory testing, field testing, experimental measurements); (iv) design in traditional engineering materials (steel, concrete, steel-concrete composite, aluminium, masonry, timber); (v) innovative concepts, sustainable engineering and special structures (nanostructures, adaptive structures, smart structures, composite structures, glass structures, bio-inspired structures, shells, membranes, space structures, lightweight structures, etc); (vi) the engineering process and life-cycle considerations (conceptualisation, planning, analysis, design, optimization, construction, assembly, manufacture, maintenance, monitoring, assessment, repair, strengthening, retrofitting, decommissioning). Two versions of the papers are available: full papers of length 6 pages are included in the e-book, while short papers of length 2 pages, intended to be concise but self-contained summaries of the full papers, are in the printed book. This work will be of interest to civil, structural, mechanical, marine and aerospace engineers, as well as planners and architects.

Download or read book Chemical Abstracts written by and published by . This book was released on 1991 with total page 2470 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical Properties of Solid Polymers written by Ian M. Ward and published by John Wiley & Sons. This book was released on 2012-10-22 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing an updated and comprehensive account of the properties of solid polymers, the book covers all aspects of mechanical behaviour. This includes finite elastic behavior, linear viscoelasticity and mechanical relaxations, mechanical anisotropy, non-linear viscoelasicity, yield behavior and fracture. New to this edition is coverage of polymer nanocomposites, and molecular interpretations of yield, e.g. Bowden, Young, and Argon. The book begins by focusing on the structure of polymers, including their chemical composition and physical structure. It goes on to discuss the mechanical properties and behaviour of polymers, the statistical molecular theories of the rubber-like state and describes aspects of linear viscoelastic behaviour, its measurement, and experimental studies. Later chapters cover composites and experimental behaviour, relaxation transitions, stress and yielding. The book concludes with a discussion of breaking phenomena.

Download or read book Textile Technology Digest written by and published by . This book was released on 2002 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NBS Monograph written by and published by . This book was released on 1959 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography and Index on Vacuum and Low Pressure Measurement written by William George Brombacher and published by . This book was released on 1961 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography and Index on Vacuum and Low Pressure Measurement January 1960 to December 1965 written by William George Brombacher and published by . This book was released on 1967 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Popular Science written by and published by . This book was released on 2005-09 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.

Download or read book Micro and Opto Electronic Materials and Structures Physics Mechanics Design Reliability Packaging written by Ephraim Suhir and published by Springer Science & Business Media. This book was released on 2007-05-26 with total page 1471 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides the most comprehensive, up-to-date and easy-to-apply information on the physics, mechanics, reliability and packaging of micro- and opto-electronic materials. It details their assemblies, structures and systems, and each chapter contains a summary of the state-of-the-art in a particular field. The book provides practical recommendations on how to apply current knowledge and technology to design and manufacture. It further describes how to operate a viable, reliable and cost-effective electronic component or photonic device, and how to make such a device into a successful commercial product.

Download or read book Maro Polymer Notes written by and published by . This book was released on 2001 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Tech Briefs written by and published by . This book was released on 1996 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1966-06 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.