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Modeling Methods For Process Induced Distortions Of Cfrp Parts Produced In The Prepreg Autoclave Process
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Book Synopsis Modeling Methods for Process Induced Distortions of CFRP-Parts produced in the Prepreg-Autoclave-Process by : Tim Frerich
Download or read book Modeling Methods for Process Induced Distortions of CFRP-Parts produced in the Prepreg-Autoclave-Process written by Tim Frerich and published by Logos Verlag Berlin GmbH. This book was released on 2023-06-20 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Process induced distortions are a challenge in the production of high-performance components made of carbon fiber reinforced plastics. In order to prevent the distortions, a prediction is of great utility. For components manufactured in the prepreg autoclave process, which is often used in the aerospace industry, prediction methods are investigated within this work. First, the state of the art is discussed and, based on this, two promising approaches are identified, which are further investigated and implemented: A rapid simulation approach and a complex one, which requires more effort but allows further investigations of the distortions. For the latter approach, new material models and rules of mixture are developed that take into account modern material architectures with interleaf layers. Using these material models, the observed material behavior can be represented more accurately than with material models from the literature. The results obtained by both approaches are compared with experimental results. A good agreement can be shown between the measurements and the simulation.
Book Synopsis Advances in Computational Methods in Manufacturing by : R. Ganesh Narayanan
Download or read book Advances in Computational Methods in Manufacturing written by R. Ganesh Narayanan and published by Springer Nature. This book was released on 2019-10-17 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a selection of papers from the 2nd International Conference on Computational Methods in Manufacturing (ICCMM 2019). The papers cover the recent advances in computational methods for simulating various manufacturing processes like machining, laser welding, laser bending, strip rolling, surface characterization and measurement. Articles in this volume discuss both the development of new methods and the application and efficacy of existing computational methods in manufacturing sector. This volume will be of interest to researchers in both industry and academia working on computational methods in manufacturing.
Book Synopsis Processing of Polymer Matrix Composites by : P.K. Mallick
Download or read book Processing of Polymer Matrix Composites written by P.K. Mallick and published by CRC Press. This book was released on 2017-10-06 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer matrix composites are finding increasing number of applications due to their high weight-saving potential as well as unique characteristics, such as high strength-to-density ratio, fatigue resistance, high damping factor, and freedom from corrosion. While many textbooks are available on the mechanics of polymer matrix composites, few cover their processing.Processing of Polymer Matrix Composites fills this gap. The book focuses on the major manufacturing processes used for polymer matrix composites and describes process details, process parameters and their effects on properties and process-induced defects, and analytical and experimental methods used for understanding process conditions. The book describes fibers, thermosetting and thermoplastic polymers, and interface characteristics that are important from the standpoint of both design and processing. It also emphasizes the applications of process fundamentals for both continuous fiber and short fiber polymer matrix composites. In addition the book considers quality inspection methods, tooling, and manufacturing costs and environmental and safety issues.
Book Synopsis Research in Tolerancing by : Sandro Wartzack
Download or read book Research in Tolerancing written by Sandro Wartzack and published by Springer Nature. This book was released on with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermally Assisted Consolidation of Out-of-autoclave Prepreg for Concave Parts by : Marissa Hughes
Download or read book Thermally Assisted Consolidation of Out-of-autoclave Prepreg for Concave Parts written by Marissa Hughes and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Vacuum Bag Only, Out-of-Autoclave prepreg processing offers a sustainable, cost-efficient alternative to conventional autoclave manufacturing of high strength composite parts. Flat or low curvature parts made with Out-of-Autoclave prepregs have demonstrated comparable mechanical properties to their autoclave counterparts, yet challenges still remain with the fabrication of parts with more complex features. One area of concern is corner thickening in concave corners. Best practices for reducing this defect exist; however, a more robust processing technique is desirable. In this work, a manufacturing process is proposed that involves heating the laminate during the vacuum bag compaction at regular intervals in the layup process. The aim of these heated debulks is to reduce corner thickening early on in the manufacturing process by encouraging inter-ply slipping, precipitating air removal, and increasing the degree of impregnation.Before the process could be designed, its potential was assessed through material characterization and demonstrator studies. Inter-ply friction was characterized for debulked samples using pull-out tests, allowing for a better understanding of the forces required to encourage prepreg slip. Dynamic mechanical analysis was used to assess changes in the degree of cure caused by debulking, and found a slight increase in curing with increased debulk temperature and duration. Investigating the removal of air from a tool-part interface showed no impact of heating on air removal rate. It was observed that air returned to the plies if vacuum was released when the resin viscosity was low.Initial trials were run on flat plates. There was a decrease in short beam shear strength as the debulk dwell temperature increased. Meanwhile, low temperature hot debulks led to an increase in voids. L-brackets were manufactured on a concave tool. The hot debulk led to a 25% reduction in corner thickening and a 80% reduction in void content compared to the part debulked at room temperature. Such improvements in quality motivated the development of a more robust design for a hot debulk process. This procedure consisted of using an infrared lamp to heat the prepreg, dry carbon fibre fabric as breather to absorb the heat while evacuating gases, and a bath of dry ice used to cool the tool before the vacuum bag was vented.Parts were then made using this procedure with different debulk durations, temperatures, and frequencies. Longer hot debulks led to the greatest reduction in corner thickening, although improvements were observed for short, high temperature debulks. Long, high temperature debulks led to an increase in voids. Fewer debulks led to thicker corners and higher void contents, regardless of debulk temperature. Short beam shear strength was not impacted by the debulk procedure.A better understanding of the relationship between debulk time and temperature was necessary so an existing model was modified to simulate the trends observed. There are several barriers, both theoretical and empirical, that need to be overcome before this model can be used for process refinement. The work presented here contributes to the field in being among the first publicly available literature to methodically develop a detailed hot debulk procedure and to establish processing conditions to lead to improvements in part quality." --
Book Synopsis Mechanics of Fibrous Composites by : Carl T. Herakovich
Download or read book Mechanics of Fibrous Composites written by Carl T. Herakovich and published by Wiley. This book was released on 1997-12-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive coverage of micro and macro mechanics of composite materials. * Case studies on designing composite materials and laminates. * Uses both SI and U.S. Customary units throughout. * This is the only book that covers laminated tubes and damage mechanics and the only one that presents an extensive array of actual experimental results for the nonlinear, inelastic response of polymeric and metallic matrix composites.
Book Synopsis Residual Stresses in Composite Materials by : Mahmood M. Shokrieh
Download or read book Residual Stresses in Composite Materials written by Mahmood M. Shokrieh and published by Woodhead Publishing. This book was released on 2014-02-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual stresses are a common phenomenon in composite materials. They can either add to or significantly reduce material strength. Because of the increasing demand for high-strength, light-weight materials such as composites and their wide range of applications in the aerospace and automotive industries, in civil infrastructure and in sporting applications, it is critical that the residual stresses of composite materials are understood and measured correctly.The first part of this important book reviews destructive and non-destructive testing (NDT) techniques for measuring residual stresses. Various mathematical (analytical and numerical) methods for calculation of residual stresses in composite materials are also presented. Chapters in the first section of the book discuss the simulated hole drilling method, the slitting/crack compliance method, measuring residual stresses in homogeneous and composite glass materials using photoelastic techniques, and modeling residual stresses in composite materials. The second part of the book discusses residual stresses in polymer matrix, metal-matrix and a range of other types of composites. Moreover, the addition of nanoparticles to the matrix of polymeric composites as a new technique for reduction of residual stresses is discussed.Residual stresses in composite materials provides a comprehensive overview of this important topic, and is an invaluable reference text for both academics and professionals working in the mechanical engineering, civil engineering, aerospace, automotive, marine and sporting industries. - Reviews destructive and non-destructive testing (NDT) techniques for measuring residual stresses - Discusses residual stresses in polymer matrix, metal-matrix and other types of composite - Considers the addition of nanoparticles to the matrix of polymeric composites as a new technique for reduction of residual stresses
Book Synopsis Composites Manufacturing by : Sanjay Mazumdar
Download or read book Composites Manufacturing written by Sanjay Mazumdar and published by CRC Press. This book was released on 2001-12-27 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: More and more companies manufacture reinforced composite products. To meet the market need, researchers and industries are developing manufacturing methods without a reference that thoroughly covers the manufacturing guidelines. Composites Manufacturing: Materials, Product, and Process Engineering fills this void. The author presents a fundamental
Book Synopsis Commercial Aircraft Composite Technology by : Ulf Paul Breuer
Download or read book Commercial Aircraft Composite Technology written by Ulf Paul Breuer and published by Springer. This book was released on 2016-05-10 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on lectures held at the faculty of mechanical engineering at the Technical University of Kaiserslautern. The focus is on the central theme of societies overall aircraft requirements to specific material requirements and highlights the most important advantages and challenges of carbon fiber reinforced plastics (CFRP) compared to conventional materials. As it is fundamental to decide on the right material at the right place early on the main activities and milestones of the development and certification process and the systematic of defining clear requirements are discussed. The process of material qualification - verifying material requirements is explained in detail. All state-of-the-art composite manufacturing technologies are described, including changes and complemented by examples, and their improvement potential for future applications is discussed. Tangible case studies of high lift and wing structures emphasize the specific advantages and challenges of composite technology. Finally, latest R&D results are discussed, providing possible future solutions for key challenges such as low cost high performance materials, electrical function integration and morphing structures.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Composite Materials by : Kamal K. Kar
Download or read book Composite Materials written by Kamal K. Kar and published by Springer. This book was released on 2016-10-14 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials are used as substitutions of metals/traditional materials in aerospace, automotive, civil, mechanical and other industries. The present book collects the current knowledge and recent developments in the characterization and application of composite materials. To this purpose the volume describes the outstanding properties of this class of advanced material which recommend it for various industrial applications.
Book Synopsis Manufacturing of Polymer Composites by : B. Tomas Astrom
Download or read book Manufacturing of Polymer Composites written by B. Tomas Astrom and published by Routledge. This book was released on 2018-04-27 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential application areas for polymer composites are vast. While techniques and methodologies for composites design are relatively well established, the knowledge and understanding of post-design issues lag far behind. This leads to designs and eventually composites with disappointing properties and unnecessarily high cost, thus impeding a wider industrial acceptance of polymer composites. Manufacturing of Polymer Composites completely covers pre- and post-design issues. While the book enables students to become fully comfortable with composites as a possible materials choice, it also provides sufficient knowledge about manufacturing-related issues to permit them to avoid common pitfalls and unmanufacturable designs. The book is a fully comprehensive text covering all commercially significant materials and manufacturing techniques while at the same time discussing areas of research and development that are nearing commercial reality.
Book Synopsis Heat Transfer in Polymer Composite Materials by : Nicolas Boyard
Download or read book Heat Transfer in Polymer Composite Materials written by Nicolas Boyard and published by John Wiley & Sons. This book was released on 2016-03-28 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses general information, good practices and examples about thermo-physical properties, thermo-kinetic and thermo-mechanical couplings, instrumentation in thermal science, thermal optimization and infrared radiation.
Book Synopsis Manufacturing Processes for Advanced Composites by : Flake C Campbell Jr
Download or read book Manufacturing Processes for Advanced Composites written by Flake C Campbell Jr and published by Elsevier. This book was released on 2003-12-18 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: • One of very few books available to cover this subject area. • A practical book with a wealth of detail.This book covers the major manufacturing processes for polymer matrix composites with an emphasis on continuous fibre-reinforced composites. It covers the major fabrication processes in detail.Very few books cover the details of fabrication and assembly processes for composites. This book is intended for the engineer who wants to learn more about composite processing: any one with some experience in composites should be able to read it. The author, who has 34 years experience in the aerospace industry, has intentionally left out mathematical models for processes so the book will be readable by the general engineer. It differs from other books on composites manufacturing in focussing almost solely on manufacturing processes, while not attempting to cover materials, test methods, mechanical properties and other areas of composites.
Book Synopsis Polymer Matrix Composites and Technology by : Ru-Min Wang
Download or read book Polymer Matrix Composites and Technology written by Ru-Min Wang and published by Elsevier. This book was released on 2011-07-14 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given such properties as low density and high strength, polymer matrix composites have become a widely used material in the aerospace and other industries. Polymer matrix composites and technology provides a helpful overview of these materials, their processing and performance.After an introductory chapter, part one reviews the main reinforcement and matrix materials used as well as the nature of the interface between them. Part two discusses forming and molding technologies for polymer matrix composites. The final part of the book covers key aspects of performance, including tensile, compression, shear and bending properties as well as impact, fatigue and creep behaviour.Polymer matrix composites and technology provides both students and those in industry with a valuable introduction to and overview of this important class of materials. - Provides a helpful overview of these materials, their processing and performance incorporating naming and classification of composite materials - Reviews the main reinforcement and matrix materials used as well as the nature of the interface between them including damage mechanisms - Discusses forming and molding technologies for polymer matrix composites outlining various techniques and technologies
Book Synopsis Pultrusion for Engineers by : T. Starr
Download or read book Pultrusion for Engineers written by T. Starr and published by Elsevier. This book was released on 2000-07-25 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pultrusion for engineers is a comprehensive overview of the latest developments and applications for this growing and increasingly important area of the fibre reinforced plastics industry.Trevor Starr is well known as a specialist consultant with many year's experience in the FRP world. He has assembled an international panel of distinguished experts to provide the widest possible coverage of the state-of-the-art in novel pultrusion applications and development including many leading US researchers such as Brandt Goldworthy, regarded by many as the father of modern pultrusion.Because this book is one of very few to cover pultrusion, it is essential reading for industrial producers of pultruded profiles, chemical companies producing resins and composite materials specialists eager to reach the new markets in, for example, civil engineering that are rapidly being opened up to design solutions involving pultrusions.
Book Synopsis Residual Stress Measurement and the Slitting Method by : Weili Cheng
Download or read book Residual Stress Measurement and the Slitting Method written by Weili Cheng and published by Springer Science & Business Media. This book was released on 2007-02-24 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides complete coverage of the slitting method. It details new results in analysis, computation, and estimation and discusses different roles of residual stresses from the fracture mechanics perspective. It provides detailed formulations and examples of compliance functions, weighted least squares fit and convergence test in stress estimation, and computer programs to facilitate the implementation of the slitting method.
