Download or read book An Overstress Model for Solid Polymer Deformation Behavior Applied to Nylon 66 written by E. Krempl and published by . This book was released on 2000 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive experimental investigations at ambient temperature on commercial Nylon 66, PEI (Polyetherimide) and PEEK (poly(ether ether ketone)) have shown that the overstress model developed for viscoplasticity should be, in principle, capable of modeling for solid polymers the rate-dependent behavior, including creep, relaxation and cyclic motions. The viscoplasticity theory based on overstress was modified accordingly to allow for the modeling of typical solid polymer deformation behavior. Included are nonlinear rate sensitivity, curved unloading, significant strain recovery at zero stress and cyclic softening. The visco plasticity theory based on overstress for polymers (VBOP) is introduced in uniaxial formulation. It is shown that VBOP can be thought of as a modified standard linear solid with overstress-dependent viscosity and nonlinear, hysteretic equilibrium stress evolution. VBOP consists of a flow law that is easily adopted to cases where the strain or the stress is the independent variable. The flow law depends on the overstress, the difference between the stress and the equilibrium stress with the latter being a state variable of VBOP. The growth law of the equilibrium stress in turn contains the kinematic stress and the isotropic or rate-independent stress, two additional state variables of VBOP. The material constants of VBOP are determined for Nylon 66 at room temperature and various tests are simulated by numerically integrating the set of nonlinear differential equations. The simulations include monotonic loading and unloading at various strain rates, repeated relaxation, recovery at zero stress that is dependent on prior strain rate, and cyclic strain-controlled loading. Finally, the stress-controlled loading and unloading are predicted with very good results. The simulations and predictions show that VBOP is competent at modeling the behavior of Nylon 66 and other solid polymers.
Download or read book Time Dependent and Nonlinear Effects in Polymers and Composites written by Richard Allan Schapery and published by ASTM International. This book was released on 2000 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Improved reliability in commercial and military applications requires improved understanding of and predictive models for the time- dependent and nonlinear mechanical behavior of polymeric composites. The May 1998 American Society for Testing and Materials symposium sought to fuse the efforts in this direction of specialists in polymers and composites; these 18 papers are therefore grouped under the subheadings of polymers and composites. Primary polymer topics are chemical and physical aging, nonlinear viscoelasticity, and viscoplasticity. Composites' issues include: the effect of physical aging on time-dependent behavior, multiaxial nonlinear effects, compressive behavior, nonlinear viscoelasticity and viscoplasticity, failure mechanisms, hygrothermal effects, durability, and accelerated strength testing. Schapery is affiliated with the U. of Texas at Austin, and Sun is at Purdue U. Annotation copyrighted by Book News, Inc., Portland, OR.
Download or read book Handbook of Materials Behavior Models written by Jean Lemaitre (ed.) and published by Academic Press. This book was released on 2001 with total page 1231 pages. Available in PDF, EPUB and Kindle. Book excerpt: V. 1. Deformations of materials -- v. 2. Failures of materials -- v. 3. Multiphysics behaviors includes three-volume index.
Download or read book IUTAM Symposium on Creep in Structures written by S. Murakami and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain 48 innovative papers consolidating the development of creep research since 1990 and discussing the new horizons in this fundamental field of applied mechanics in the coming century. This volume is useful for researchers and graduate course students in the relevant fields.
Download or read book Properties and Behavior of Polymers 2 Volume Set written by Wiley and published by John Wiley & Sons. This book was released on 2012-12-03 with total page 1605 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides comprehensive, up-to-date information on the physical properties of polymers including, viscoelasticity, flammability, miscibility, optical properties, surface properties and more. Containing carefully selected reprints from the Wiley's renowned Encyclopedia of Polymer Science and Technology, this reference features the same breadth and quality of coverage and clarity of presentation found in the original.
Download or read book The Deformation Behavior of Solid Polymers and Modeling with the Viscoplasticity Theory Based on Overstress written by Fazeel Jilani Khan and published by . This book was released on 2003 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties of Polycarbonate written by Weihong Zhang and published by Elsevier. This book was released on 2019-08-26 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical Properties of Polycarbonate: Experiment and Modeling for Aeronautical and Aerospace Applications provides a detailed description on experimental characterization, material modeling and finite element simulation method for polycarbonate in aeronautical and aerospace applications. The book presents the experiment facilities and methods used in characterizing the mechanical properties of polycarbonate in a large range of strain rates and temperatures. The constitutive modeling of polycarbonate and the finite element simulation of polycarbonate products under impact loading are illustrated in detail. Finally, an optimization methodology is devised to optimize the injection molding process parameters for high mechanical performance of the product under impact loading. - Provides a detailed description of experimental methods and modeling technologies for the characterization of polycarbonate in aeronautical and aerospace applications - Proposes an integrative method that combines treatment and mechanical simulations for polycarbonate products - Helps readers learn how to test the mechanical properties of polycarbonate in a wide range of strain rates and temperatures
Download or read book Current Advances in Mechanical Design and Production VII written by M.F. Hassan and published by Elsevier. This book was released on 2000-01-31 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Mechanical Design and Production has over the years established itself as an excellent forum for the exchange of ideas in these established fields. The first of these conferences was held in 1979. The seventh, and most recent, conference in the series was held in Cairo during February 15-17, 2000. International engineers and scientists gathered to exchange experiences and highlight the state-of-the-art research in the fields of mechanical design and production. In addition a heavy emphasis was placed on the issue of technology transfer. Over 100 papers were accepted for presentation at the conference. Current Advances in Mechanical Design & Production VII does not, however, attempt to publish the complete work presented but instead offers a sample that represents the quality and breadth of both the work and the conference. Ten invited papers and 54 ordinary papers have been selected for inclusion in these proceedings. They cover a range of basic and applied topics that can be classified into six main categories: System Dynamics, Solid Mechanics, Material Science, Manufacturing Processes, Design and Tribology, and Industrial Engineering and its Applications.
Download or read book Advances in Manufacturing Technology XXXIII written by Y. Jin and published by IOS Press. This book was released on 2019-08-22 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development and management of technologies and operations are key to the success of all types of manufacturing business. This book presents the proceedings of the 17th International Conference on Manufacturing Research (ICMR 2019), held in Belfast, UK, on 10 – 12 September 2019. ICMR has been the UK’s main manufacturing research conference for 34 years and an international conference since 2003. It brings together researchers, academics and industrialists to share their vision, knowledge and experience and discuss emerging trends and new challenges in manufacturing research. The conference theme of ICMR2019 was smart manufacturing, and the book includes the 82 papers presented at the conference (representing an acceptance rate of 69%). These have been divided into 13 parts, which cover topics ranging from robot automation and machining processes, additive manufacturing, composite manufacturing, design methods, to information management, quality control, production optimization and product lifecycle management. Providing an overview of current trends and developments, the book will be of interest to researchers and engineers in the relevant area of manufacturing processes, design and production management.
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 Composite Materials written by Charles E. Bakis and published by ASTM International. This book was released on 2003 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The 14th ASTM Symposium on Composite Materials: Testing and Design, was held March 11-12, 2002 in Pittsburgh, PA. The Testing and Design symposia, sponsored by Committee D30 on Composite Materials, have been scheduled on a roughly bi-yearly basis since 1969 to provide a forum for researchers and practitioners to meet and exchange their latest methods and findings related to the testing and design of composite materials and structures."
Download or read book Plastic and Viscoplastic Response of Materials and Metal Forming written by Akhtar S. Khan and published by . This book was released on 2000 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extension of Viscoplasticity Based on Overstress to Capture the Effects of Prior Aging on the Time Dependent Deformation Behavior of a High temperature Polymer written by Amber J. W. McClung and published by . This book was released on 2008 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Polymer Science and Technology written by Herman Francis Mark and published by . This book was released on 2003 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt: This completely new Third Edition of the Mark Encyclopedia of Polymer Science and Technology brings the state-of-the-art to the 21st century, with coverage of nanotechnology, new imaging and analytical techniques, new methods of controlled polymer architecture, biomimetics, and more. Whereas earlier editions published one volume at a time, the third edition is being published in 3 Parts of 4 volumes each. Each of these 4-volume Parts is an A-Z selection of the latest in polymer science and technology as published in the updated online edition of the Mark Encyclopedia of Polymer Science and Technology (available at www.mrw.interscience.wiley.com/epst). Order the 12 volume set (ISBN 0471275077) now for the best value and receive each of the 4 volume Parts as they publish. The complete list of titles to appear in Part 1 of this new third print edition can be viewed at www.mrw.interscience.wiley.com/epst and clicking on "What's New". Check this website often as new articles are added periodically.
Download or read book Effects of Prior Aging at 274 Degree C in Argon on Inelastic Deformation Behavior of PMR 15 Polymer at 288 Degreee C Experiment and Modeling written by and published by . This book was released on 2010 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The inelastic deformation behavior of PMR-15 neat resin, a high-temperature polymer, was investigated at 288 deg C. The experimental program was designed to explore the influence of strain rate on loading and unloading behaviors. In addition, the effect of prior strain rate on creep, relaxation, and recovery responses was evaluated. The material exhibits positive, nonlinear strain rate sensitivity in monotonic loading. The creep, relaxation, and recovery responses are significantly influenced by prior strain rate. The experimental data were modeled using the Viscoplasticity Based on Overstress for Polymers (VBOP) theory. The effects of prior aging in argon at 274 deg C on the time (rate)-dependent behavior of the PMR-15 polymer were evaluated in a series of stress and strain controlled experiments. Several of the VBO material parameters were expanded as functions of prior aging time. The resulting model was used to predict the behavior of PMR-15 subjected to prior aging at 274 deg C for 2000h. The effects of aging at 274 deg C were compared to previous research in which aging was conducted at 288 deg C.
Download or read book JSME International Journal written by and published by . This book was released on 1998 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fourth International Conference on Constitutive Laws for Engineering Materials written by R. C. Picu and published by . This book was released on 1999 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
