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Author: Peidong Han Publisher: LAP Lambert Academic Publishing ISBN: 9783659333804 Category : Languages : en Pages : 200
Book Description
Digital manufacturing techniques can simulate complex assembly sequences using 'as designed' part forms and their utility has been proven across the automotive and aerospace industries. However, the reality of working with composite components is that geometric variability arising from part forming or processing conditions, can cause problems during assembly as the 'as manufactured' form differs from the geometry used for any process capability definition or simulated build validation. Composites possess attractive properties such as improved structural performance and lower product weight. For thermoplastic based composites improved recyclability is another important factor as sustainability is a key requirement for transport systems of the future. This book introduces predictive methods and technologies for manufacturing practices based on carbon fibre reinforced thermoplastic materials. Equipped with the prediction and simulation technologies developed in this work, composite part design, manufacturability and build validation can now be included in the design process from the earliest conceptual stage where up to 80% of final product cost is determined.
Author: Peidong Han Publisher: LAP Lambert Academic Publishing ISBN: 9783659333804 Category : Languages : en Pages : 200
Book Description
Digital manufacturing techniques can simulate complex assembly sequences using 'as designed' part forms and their utility has been proven across the automotive and aerospace industries. However, the reality of working with composite components is that geometric variability arising from part forming or processing conditions, can cause problems during assembly as the 'as manufactured' form differs from the geometry used for any process capability definition or simulated build validation. Composites possess attractive properties such as improved structural performance and lower product weight. For thermoplastic based composites improved recyclability is another important factor as sustainability is a key requirement for transport systems of the future. This book introduces predictive methods and technologies for manufacturing practices based on carbon fibre reinforced thermoplastic materials. Equipped with the prediction and simulation technologies developed in this work, composite part design, manufacturability and build validation can now be included in the design process from the earliest conceptual stage where up to 80% of final product cost is determined.
Author: D. Bhattacharyya Publisher: Elsevier ISBN: 0080529593 Category : Science Languages : en Pages : 549
Book Description
Sheet forming is the most common process used in metal forming and is therefore constantly being adapted or modified to suit the needs of forming composite sheets. Due to the increasing availability of various types of fibre reinforced polymeric sheets, especially with thermoplastic matrices, the scope of use of such materials is rapidly expanding in the automobile, building, sports and other manufacturing industries beyond the traditional areas of aerospace and aircraft applications. This book contains twelve chapters and attempts to cover different aspects of sheet forming including both thermoplastic and thermosetting materials. In view of the expanded role of fibre reinforced composite sheets in the industry, the book also describes some non-traditional applications, processes and analytical techniques involving such materials.The first chapter is a brief introduction to the principles of sheet metal forming. The next two chapters introduce the various forms of materials, manufacturing techniques and the fundamentals of computer simulation. Chapter 4 describes the different aspects of thermoforming of continuous fibre reinforced thermoplastics and the following chapter studies the shear and frictional behaviour of composite sheets during forming. Chapter 6 explores the possibility of applying the grid strain analysis method in continuous fibre reinforced polymeric sheets. The next two chapters address fundamental concepts and recent developments in finite element modelling and rheology. Chapter 9 introduces the theory of bending of thermoplastic composite sheets and shows a novel way of determining both longitudinal and transverse viscosities through vee-bend tests. A significant expansion in the usage of composite materials is taking place in biomedical areas. Chapter 10 discusses the thermoforming of knitted fabric reinforced thermoplastics for load bearing and anisotropic bio-implants. The final chapter introduces roll forming, a commonly used rapid manufacturing process for sheet metals, and discusses the possibility of applying it economically for continuous reinforced thermoplastic sheets.
Author: Charles Lu Publisher: SAE International ISBN: 0768001900 Category : Technology & Engineering Languages : en Pages : 190
Book Description
Since the successful production of carbon fibers in early 1960s, composite materials have emerged as the materials of choice for general aviation aircraft, military aircraft, space launch vehicles, and unmanned air vehicles. This has revolutionized the aerospace industry due to their excellent mechanical and physical properties, as well as weight-reducing ability. The next- generation material development model should operate in an integrated computational environment, where new material development, manufacturability, and product design practice are seamlessly interconnected. Materials and Process Modeling of Aerospace Composites reports recent developments on materials and processes of aerospace composites by using computational modeling, covering the following aspects: • The historical uses of composites in aerospace industry, documenting in detail the early usage of composite materials on Premier I by Raytheon to recent full-scale applications of composites on large commercial aircraft by Boeing and Airbus. • An overview on the classifications of composites used in aerospace industry, ranging from conventional glass- fiber reinforced composites to advanced graphene nanocomposites. • The recent work on computational material engineering on aerospace composite materials, including fundamental computational frame work and case studies on the modeling of materials and processes
Author: Richard Day Publisher: Lulu.com ISBN: 0946881804 Category : Technology & Engineering Languages : en Pages : 91
Book Description
Proceedings of the Third International Conference on Advanced Composite Materials and Technologies for Aerospace Applications held on May 13-16, 2013, Wrexham, North Wales, United Kingdom
Author: Corey Lynam, P. Eng., Publisher: DEStech Publications, Inc ISBN: 1605950424 Category : Technology & Engineering Languages : en Pages : 102
Book Description
Models and experiments for faster, less expensive manufacture of thermoplastic partsFocused on simulating thermal defects in thermoplasticsTechniques for better molds, tooling and equipment Book explains methods and coding to create FEM-based models to optimize process variables and predict dimensional distortions during the manufacture of thermoplastic matrix composite parts. After investigating defects, such as spring-in, caused by thermal inconsistencies during manufacture, the text offers a step-by-step approach to simulating and predicting the magnitude of distortion via readily available FE codes. Models are validated by testing using the example of a multi-staged roll-formed continuous thermoplastic woven laminate, which can be readily extended to a variety of mold geometries. Information in this book is intended to reduce the need for costly and time-consuming re-tooling in thermoplastic parts design.
Author: Spiros Pantelakis Publisher: Springer Nature ISBN: 303035346X Category : Technology & Engineering Languages : en Pages : 405
Book Description
This book addresses the emerging needs of the aerospace industry by discussing recent developments and future trends of aeronautic materials. It is aimed at advancing existing materials and fostering the ability to develop novel materials with less weight, increased mechanical properties, more functionality, diverse manufacturing methods, and recyclability. The development of novel materials and multifunctional materials has helped to increase efficiency and safety, reduce costs, and decrease the environmental foot print of the aeronautical industry. In this book, integral metallic structures designed by disruptive concepts, including topology optimization and additive manufacturing, are highlighted.
Author: Sudharshan Venkatesan Publisher: ISBN: Category : Composite materials Languages : en Pages : 674
Book Description
Composite materials are fast gaining popularity as an alternative to metals for structural and load bearing applications in aerospace, automotive, alternate energy and consumer applications industries. With the advent of thermoplastic composites and advances in recycling technologies, fully recyclable composites are gaining ground over traditional thermosetting composites. For the widespread use of composite material, the cost of manufacturing is one of the key challenges. Stamp forming has been proven to be effective for mass production of components. This thesis investigates the feasibility of using stamp forming technique for the processing of thermoplastic, recyclable composite materials. The investigation includes a detailed experimental study based on the strain measurements using a non-contact optical strain measurement system in conjunction with the stamping equipment to record and measure the formability of the thermoplastic composites in real time. A statistical analysis approach based on Design of Experiments and ANOVA was used to identify the influence of process parameters on the forming behaviour of the composite materials. Significant changes in the forming modes, including increased biaxial stretch and plane strain, experienced by the composite blanks were analysed. The research on the forming modes show that the composite materials can be stamp formed for mass production. To develop a finite element material model to elucidate the response of the material to temperature, an experimental characterisation was undertaken for the two composite materials used. This formed the basis of a temperature dependent, non-linear elastic orthotropic material model which was incorporated into LS-Dyna explicit finite element code. The results from the finite element simulations showed a high degree of correlation with the experimental results. Significant improvement was made over the existing constitutive models of the material library by including the thermal effects on the stress-strain behaviour of the composite materials. This improvement is a world's first in implementing thermal dependency with non-linear orthotropic behaviour for composite materials. This temperature dependency is vital for accurate simulation of stamp forming of heated composite materials. The analysis of the strain measurements and forming modes indicate that significant reduction in compressive strains can be achieved with the application of temperature and blank holder forces. This finding has important ramifications to real world manufacturing where any failure in the flange region could propagate to the areas of interest in a processed part. A through the thickness strain estimate has been studied to illustrate the effect of the forming parameters. An important conclusion that resulted from this investigation is the need for a judicial choice of the process parameters which are paramount to the quality of the manufactured part. These results indicate that composite materials have the potential to exhibit superior forming behaviour compared to aluminium. Currently, aluminium is considered as an attractive, lightweight alternative to steel in the body panels of automobiles. The results from this study indicate that thermoplastic composites have superior forming characteristics to aluminium and hence, have a potential to be the material of choice to reduce the weight of automobiles. - provided by Candidate.
Author: Haibin Ning Publisher: Walter de Gruyter GmbH & Co KG ISBN: 1501511610 Category : Technology & Engineering Languages : en Pages : 369
Book Description
The book covers various thermoplastic composites, including continuous and discontinuous fiber thermoplastic composites. It describes processing methods and explains the effect of different processing parameters on the structure and performance of thermoplastic composites. Characterization and mechanics of the composite are also discussed in the book.
Author: Aleksandar Subic Publisher: Springer Science & Business Media ISBN: 364224145X Category : Technology & Engineering Languages : en Pages : 389
Book Description
The book on Sustainable Automotive Technologies aims to draw special attention to the research and practice focused on new technologies and approaches capable of meeting the challenges to sustainable mobility. In particular, the book features incremental and radical technical advancements that are able to meet social, economic and environmental targets in both local and global contexts. These include original solutions to the problems of pollution and congestion, vehicle and public safety, sustainable vehicle design and manufacture, new structures and materials, new power-train technologies and vehicle concepts. In addition to vehicle technologies, the book is also concerned with the broader systemic issues such as sustainable supply chain systems, integrated logistics and telematics, and end-of-life vehicle management. It captures selected peer reviewed papers accepted for presentation at the 4th International Conference on Sustainable Automotive Technologies, ICSAT2012, held at the RMIT, Melbourne, Australia.
Author: Peidong Han
Author: Peidong Han
Author: D. Bhattacharyya
Author: Charles Lu
Author: Richard Day
Author: Corey Lynam, P. Eng., 
Author: Spiros Pantelakis
Author: Frédéric Hallé
Author: Sudharshan Venkatesan
Author: Haibin Ning
Author: Aleksandar Subic