Development Of A Thermoplastic Prepreg Manufacturing Process By Continuous Resin Infusion
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Development Of A Thermoplastic Prepreg Manufacturing Process By Continuous Resin Infusion
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Author : J. Cody Ragone
language : en
Publisher:
Release Date : 2008
Development Of A Thermoplastic Prepreg Manufacturing Process By Continuous Resin Infusion written by J. Cody Ragone and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Gums and resins categories.
Materials Design And Manufacturing For Lightweight Vehicles
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Author : P.K. Mallick
language : en
Publisher: Woodhead Publishing
Release Date : 2020-09-26
Materials Design And Manufacturing For Lightweight Vehicles written by P.K. Mallick and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-09-26 with Technology & Engineering categories.
Materials, Design and Manufacturing for Lightweight Vehicles, Second Edition, features the requirements for processing each material type, explains the manufacture of different categories of components, and analyzes different component joining techniques. The properties of all materials, metals, polymers and composites currently used are included along with how each one influences structural design. The new edition also contains refinements to manufacturing processes in particular hot stamping of boron steel and aluminum alloy, and new chapters on designing lightweight automotive structures & lightweight materials for powertrains and electric vehicles. With its distinguished editor and renowned team of contributors, this is a standard reference for practicing engineers involved in the design and material selection for motor vehicle bodies and components as well as material scientists, environmental scientists, policy makers, car companies and automotive component manufacturers. Fully updated including emphasis on optimized production methods for steels, aluminum alloys, polymers and polymer composite Covers aspects related to the production of environmentally acceptable leading-edge automobiles Explores the manufacturing process for light alloys including metal forming processes for automotive applications as well as new developments in steel technology that are making advanced high strength steels more attractive for lightweight vehicles
Commercial Aircraft Composite Technology
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Author : Ulf Paul Breuer
language : en
Publisher: Springer
Release Date : 2016-05-10
Commercial Aircraft Composite Technology written by Ulf Paul Breuer and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-05-10 with Technology & Engineering categories.
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.
Development Of Vacuum Assisted Resin Infusion Molding Process For High Temperature Polymer Composites
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Author : A. Sherif El-Gizawy
language : en
Publisher:
Release Date : 2000
Development Of Vacuum Assisted Resin Infusion Molding Process For High Temperature Polymer Composites written by A. Sherif El-Gizawy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Process Modeling In Composites Manufacturing
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Author : Suresh G. Advani
language : en
Publisher: CRC Press
Release Date : 2010-07-14
Process Modeling In Composites Manufacturing written by Suresh G. Advani and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-07-14 with Technology & Engineering categories.
There is a wealth of literature on modeling and simulation of polymer composite manufacturing processes. However, existing books neglect to provide a systematic explanation of how to formulate and apply science-based models in polymer composite manufacturing processes. Process Modeling in Composites Manufacturing, Second Edition provides tangible m
Composites Manufacturing
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Author : Sanjay Mazumdar
language : en
Publisher: CRC Press
Release Date : 2001-12-27
Composites Manufacturing written by Sanjay Mazumdar and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-12-27 with Technology & Engineering categories.
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
Nanomaterial Enabled Manufacturing For Next Generation Multifunctional Advanced Composite Prepreg Laminate Architectures
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Author : Jeonyoon Lee
language : en
Publisher:
Release Date : 2018
Nanomaterial Enabled Manufacturing For Next Generation Multifunctional Advanced Composite Prepreg Laminate Architectures written by Jeonyoon Lee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Manufacturing of advanced aerospace-grade structural composites has traditionally utilized autoclaves to impart heat and pressure, in addition to vacuum, to create high-quality, void (defect)- free, reproducible structures. Carbon (micro) fiber reinforced polymer (CFRP) composites, which are pre-impregnated with a thermoset or thermoplastic polymer to form prepreg sheets, are in widespread use via autoclave processing due to their ease of use and high fiber volume fraction. However, autoclaves have high capital costs, and incur high operating costs due to the convective heating and applied pressure. Furthermore, the fixed capacity of an autoclave limits the size and design of composite parts, and the production rate is limited by autoclave availability. As a result, there has been an increasing interest in the development of alternatives, for example, out-of-autoclave (OoA) specially-formulated prepregs that only require heat and vacuum (i.e., pressure is not required). OoA prepreg processing also has drawbacks due to their specialized morphological and chemical formulation for vacuum-only conditions, as well as part quality (especially, composite interlaminar properties) that is below autoclave-processed materials. In light of the limitations described above, this dissertation (1) develops a novel prepreg processing technique, termed 'out-of- oven' (OoO) curing, that conductively cures OoA prepregs via nanoengineered resistive heating; (2) expands the applicability of the OoO process to conventional autoclave-formulated prepregs; and (3) introduces multifunctionality in the form of cure status sensing. Characteristics of the OoO process using a CNT film as a heating element are first examined and compared to those of an oven curing process, focusing on an aerospace-grade OoA-formulated unidirectional aerospace-grade CFRP prepreg system. Thermophysical and mechanical property comparisons suggest that there is no difference in laminates cured via OoO and oven curing as evaluated by void content, degree of cure analysis, short beam shear interlaminar testing, dynamic mechanical analysis, and double-edge notch tensile testing. The OoO process reduces electrical energy consumption by two orders of magnitude (from 13.7 to 0.12 MJ) due to conductive vs. convective heating, under a typical industrial curing condition for a small (60 mm x 50 mm) test panel. Modeling shows that for parts beyond a meter-scale, energy savings will also be at least two orders of magnitude. Moreover, comparative finite element modeling of the OoO and oven curing shows excellent agreement with measured values, including the reduction in electrical energy and instantaneous power consumption. Altogether, these findings show that OoO curing works for OoA prepreg systems, with significant energy savings. Given the results of the first study, the next study effectively removes the need for an autoclave by adapting the OoO process to conventional autoclave-formulated prepreg systems that currently require applied pressure of ~700 kPa in addition to vacuum. This technique entails OoO curing plus insertion of a nanoporous network (NPN, e.g., vertically aligned CNT arrays) into the interlaminar regions of autoclave-formulated composite laminates. Capillary pressure due to the NPN is calculated to be of the same order as the pressure applied in conventional autoclave processing. Results show that capillary-enhanced polymer wetting by the NPN enables sufficient reduction of interlaminar voids to levels commensurate with autoclave-processed composites. Thermophysical property comparisons and short beam shear interlaminar strength testing show that OoO-processed composites with NPN are equivalent to those of autoclave-cured composites, with energy and other savings similar to OoO curing with OoA prepreg in the first study. Conformability of the NPN to the micron-scale topology of the prepreg surface, and continuous vacuum channels created by the NPN, are identified as key factors underlying interlaminar void reduction. Finally, this dissertation introduces a multifunctional aspect of the OoO manufacturing: an in situ cure status monitoring technique utilizing the nanostructured CNT-based heating element of the OoO process. The OoO heating elements are nanoporous and CNT-based, but in this study have different morphology (randomly-oriented or in-plane aligned CNTs) than the NPN (vertically aligned CNTs, A-CNTs). As OoO curing proceeds and the heating element is powered, the adjacent polymer flows into the nanoporous heater via capillary action. Based on cure status sensing experiments and theoretical models, it is found that electrical resistance changes of the heating element correspond to several mechanisms associated with different stages in the cure process, including polymer infiltration into the CNT network that causes the average CNT-CNT junction distance to increase, giving a resistance increase. Later in the manufacturing, as the polymer cross-linking occurs after infiltration into the heating element, chemical cure shrinkage decreases the CNT-CNT junction distance, leading to a decrease in resistance. Thus, the heating element is multifunctional as a cure status sensor, and is found to be highly repeatable, demonstrating a new capability to enhance both quality and productivity of composite manufacturing. OoO curing and related processing techniques introduced here are expected to contribute to the design and manufacturing of next-generation multifunctional composite architectures. These processing techniques have several advantages, including: (1) compatibility with a wide range of composite materials, including OoA- and autoclave-formulated prepregs; (2) removal of size and shape constraints on composite components imposed by the use of a heating vessel; (3) manufacturing cost savings by efficient conductive (as opposed to convective) thermal processing; (4) production improvements via the in situ cure status monitoring by multifunctional heating elements as cure sensors; and (5) the potential for spatial heating control to accommodate structural features such as thick and thin transitions. Future work will expand the techniques to thermoplastics and other high-temperature polymers. The OoO techniques are expected to enable several systems-level production and operational savings, such as accelerated cure cycles, that require further study. Other areas of exploration include on-site composite curing and repair, and leveraging the spatial control of heat flux from the OoO technique into other OoA composite processes, such as resin infusion and resin transfer molding.
Handbook Of Manufacturing
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Author : Yong Huang
language : en
Publisher: World Scientific
Release Date : 2019-10-08
Handbook Of Manufacturing written by Yong Huang and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-08 with Technology & Engineering categories.
Handbook of Manufacturing provides a comprehensive overview of fundamental knowledge on manufacturing, covering various processes, manufacturing-related metrology and quality assessment and control, and manufacturing systems. Many modern processes such as additive manufacturing, micro- and nano-manufacturing, and biomedical manufacturing are also covered in this handbook. The handbook will help prepare readers for future exploration of manufacturing research as well as practical engineering applications.
Manufacturing Processes For Advanced Composites
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Author : Flake C Campbell Jr
language : en
Publisher: Elsevier
Release Date : 2003-12-18
Manufacturing Processes For Advanced Composites written by Flake C Campbell Jr and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-12-18 with Technology & Engineering categories.
• 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.
New Materials For Next Generation Commercial Transports
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Author : Committee on New Materials for Advanced Civil Aircraft
language : en
Publisher: National Academies Press
Release Date : 1996-03-29
New Materials For Next Generation Commercial Transports written by Committee on New Materials for Advanced Civil Aircraft and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-03-29 with Technology & Engineering categories.
The major objective of this book was to identify issues related to the introduction of new materials and the effects that advanced materials will have on the durability and technical risk of future civil aircraft throughout their service life. The committee investigated the new materials and structural concepts that are likely to be incorporated into next generation commercial aircraft and the factors influencing application decisions. Based on these predictions, the committee attempted to identify the design, characterization, monitoring, and maintenance issues that are critical for the introduction of advanced materials and structural concepts into future aircraft.