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3d Printing And Finite Element Modeling Of Auxetic Re Entrant Structures For Impact Applications
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Book Synopsis 3D Printing and Finite Element Modeling of Auxetic Re-entrant Structures for Impact Applications by : Florian Baertsch
Download or read book 3D Printing and Finite Element Modeling of Auxetic Re-entrant Structures for Impact Applications written by Florian Baertsch and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Additive manufacturing technologies such as fused filament fabrication (FFF) enable us to manufacture meta-structures with more complexity and design freedom on relevant scales. As previously reported for foam materials, a stiffness gradient can be implemented in an auxetic re-entrant structure by varying the cell height within the structure. This gradient is anticipated to be beneficial for energy absorption at different impact velocities. Thus, this work investigates the impact behavior of graded re-entrant structures. Appropriate models are necessary to simulate 3D printed re-entrant structures under static and dynamic loading conditions. Acrylonitrile butadiene styrene (ABS) was selected as the model material to print the test specimens and the structures by FFF. Quasi static tensile and compressive tests were performed in the lower strain rate range; the test data was then complemented with dynamic data of conventionally produced ABS and a constitutive model was calibrated. A dynamic explicit finite element (FE) model was set up in order to simulate the stress-strain response of reentrant structures for different angles under compression. This model was checked by quasi static compression tests of printed auxetic structures. An FE model was then set up to conduct optimization on the structures under impact loading with varying velocities. Good agreement between the simulation and experimental stress values was found for the compressive deformation characteristics of auxetic re-entrant structures with different angles, especially in the elastic and instability phases of the response. Further improvements of the FE model were achieved for higher re-entrant angles by accounting for the printing imperfections such as radii. Positive effects of stiffness gradient on the impact accelerations were observed from the optimization results, but the local optima were within small tolerances of the design parameters. Future investigations could focus on reducing the cell size and a full validation of the FE model before application.
Book Synopsis Cellular Solids by : Lorna J. Gibson
Download or read book Cellular Solids written by Lorna J. Gibson and published by Cambridge University Press. This book was released on 1997 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this new edition of their classic work on Cellular Solids, the authors have brought the book completely up to date, including new work on processing of metallic and ceramic foams and on the mechanical, electrical and acoustic properties of cellular solids. Data for commercially available foams are presented on material property charts; two new case studies show how the charts are used for selection of foams in engineering design. Over 150 references appearing in the literature since the publication of the first edition are cited. The text summarises current understanding of the structure and mechanical behaviour of cellular materials, and the ways in which they can be exploited in engineering design. Cellular solids include engineering honeycombs and foams (which can now be made from polymers, metals, ceramics and composites) as well as natural materials, such as wood, cork and cancellous bone.
Book Synopsis 3D Printing and Additive Manufacturing by : Chee Kai Chua
Download or read book 3D Printing and Additive Manufacturing written by Chee Kai Chua and published by World Scientific Publishing Company. This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resource added for the Prototype and Design program 106142.
Book Synopsis Modeling and Simulation of Functionalized Materials for Additive Manufacturing and 3D Printing: Continuous and Discrete Media by : Tarek I. Zohdi
Download or read book Modeling and Simulation of Functionalized Materials for Additive Manufacturing and 3D Printing: Continuous and Discrete Media written by Tarek I. Zohdi and published by Springer. This book was released on 2017-12-22 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the last decade, several industrialized countries have stressed the importance of advanced manufacturing to their economies. Many of these plans have highlighted the development of additive manufacturing techniques, such as 3D printing which, as of 2018, are still in their infancy. The objective is to develop superior products, produced at lower overall operational costs. For these goals to be realized, a deep understanding of the essential ingredients comprising the materials involved in additive manufacturing is needed. The combination of rigorous material modeling theories, coupled with the dramatic increase of computational power can potentially play a significant role in the analysis, control, and design of many emerging additive manufacturing processes. Specialized materials and the precise design of their properties are key factors in the processes. Specifically, particle-functionalized materials play a central role in this field, in three main regimes: (1) to enhance overall filament-based material properties, by embedding particles within a binder, which is then passed through a heating element and the deposited onto a surface, (2) to “functionalize” inks by adding particles to freely flowing solvents forming a mixture, which is then deposited onto a surface and (3) to directly deposit particles, as dry powders, onto surfaces and then to heat them with a laser, e-beam or other external source, in order to fuse them into place. The goal of these processes is primarily to build surface structures which are extremely difficult to construct using classical manufacturing methods. The objective of this monograph is introduce the readers to basic techniques which can allow them to rapidly develop and analyze particulate-based materials needed in such additive manufacturing processes. This monograph is broken into two main parts: “Continuum Method” (CM) approaches and “Discrete Element Method” (DEM) approaches. The materials associated with methods (1) and (2) are closely related types of continua (particles embedded in a continuous binder) and are treated using continuum approaches. The materials in method (3), which are of a discrete particulate character, are analyzed using discrete element methods.
Book Synopsis Fused Deposition Modeling Based 3D Printing by : Harshit K. Dave
Download or read book Fused Deposition Modeling Based 3D Printing written by Harshit K. Dave and published by Springer Nature. This book was released on 2021-04-21 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers 3D printing activities by fused deposition modeling process. The two introductory chapters discuss the principle, types of machines and raw materials, process parameters, defects, design variations and simulation methods. Six chapters are devoted to experimental work related to process improvement, mechanical testing and characterization of the process, followed by three chapters on post-processing of 3D printed components and two chapters addressing sustainability concerns. Seven chapters discuss various applications including composites, external medical devices, drug delivery system, orthotic inserts, watertight components and 4D printing using FDM process. Finally, six chapters are dedicated to the study on modeling and optimization of FDM process using computational models, evolutionary algorithms, machine learning, metaheuristic approaches and optimization of layout and tool path.
Book Synopsis Advanced Composite Materials for Aerospace Engineering by : Sohel Rana
Download or read book Advanced Composite Materials for Aerospace Engineering written by Sohel Rana and published by Woodhead Publishing. This book was released on 2016-04-26 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Composite Materials for Aerospace Engineering: Processing, Properties and Applications predominately focuses on the use of advanced composite materials in aerospace engineering. It discusses both the basic and advanced requirements of these materials for various applications in the aerospace sector, and includes discussions on all the main types of commercial composites that are reviewed and compared to those of metals. Various aspects, including the type of fibre, matrix, structure, properties, modeling, and testing are considered, as well as mechanical and structural behavior, along with recent developments. There are several new types of composite materials that have huge potential for various applications in the aerospace sector, including nanocomposites, multiscale and auxetic composites, and self-sensing and self-healing composites, each of which is discussed in detail. The book’s main strength is its coverage of all aspects of the topics, including materials, design, processing, properties, modeling and applications for both existing commercial composites and those currently under research or development. Valuable case studies provide relevant examples of various product designs to enhance learning. Contains contributions from leading experts in the field Provides a comprehensive resource on the use of advanced composite materials in the aerospace industry Discusses both existing commercial composite materials and those currently under research or development
Book Synopsis Honeycomb Technology by : T.N. Bitzer
Download or read book Honeycomb Technology written by T.N. Bitzer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: Honeycomb Technology is a guide to honeycomb cores and honeycomb sandwich panels, from the manufacturing methods by which they are produced, to the different types of design, applications for usage and methods of testing the materials. It explains the different types of honeycomb cores available and provides tabulated data of their properties. The author has been involved in the testing and design of honeycomb cores and sandwich panels for nearly 30 years. Honeycomb Technology reflects this by emphasizing a `hands-on' approach and discusses procedures for designing sandwich panels, explaining the necessary equations. Also included is a section on how to design honeycomb energy absorbers and one full chapter discussing honeycomb core and sandwich panel testing. Honeycomb Technology will be of interest to engineers in the aircraft, aerospace and building industries. It will also be of great use to engineering students interested in basic sandwich panel design.
Book Synopsis Composite Structures by : I.H. Marshall
Download or read book Composite Structures written by I.H. Marshall and published by Springer. This book was released on 1991-09-30 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers contained herein were presented at the Sixth International Conference on Composite Structures (ICCS/6) held at Paisley College, Scotland in September 1991. The Conference was organised and sponsored by Paisley College. It was co-sponsored by Scottish Enterprise, the National Engineering Laboratory, the US Army Research, Development and Standardisation Group-UK, Strathclyde Regional Council and Renfrew District Council. It forms a natural and ongoing progression from the highly successful ICCS/1/2/3/4 and 5 held at Paisley in 1981, 1983, 1985, 1987 and 1989 respectively. As we enter the final decade of this century many organisations throughout the world are adopting a prophetic role by attempting to forecast future scientific advances and their associated impact on mankind. Although some would argue that to do so is folly, without such futuristic visionaries the world would be that much poorer. IntelJigent speculation based on research trends and historical advances, rather than fanciful theories, breathes a healthy air of enthusiasm into the scientific community. Surely this is the very oxygen necessary to ignite the fir~s of innovation and invention amongst pioneers of research.
Book Synopsis Metallic Microlattice Structures by : Robert Mines
Download or read book Metallic Microlattice Structures written by Robert Mines and published by Springer. This book was released on 2019-03-21 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work reviews the current state of the art in metallic microlattice structures, manufactured using the additive manufacturing processes of selective laser melting, electron beam melting, binder jetting and photopolymer wave guides. The emphasis is on structural performance (stiffness, strength and collapse). The field of additively manufactured metallic microlattice structures is fast changing and wide ranging, and is being driven by developments in manufacturing processes. This book takes a number of specific structural applications, viz. sandwich beams and panels, and energy absorbers, and a number of conventional metallic materials, and discusses the use of additive manufactured metallic microlattice structures to improve and enhance these structural performances. Structural performances considered includes such non linear effects as plasticity, material rupture, elastic and plastic instabilities, and impact loading. The specific discussions are put into the context of wider issues, such as the effects of realisation processes, the effects of structural scale, use of sophisticated analysis and synthesis methodologies, and the application of existing (conventional) structural theories. In this way, the specific discussions are put into the context of the emerging general fields of Architectured (Architected) Materials and Mechanical Metamaterials.
Book Synopsis Recent Advances in Manufacturing Processes and Systems by : Harshit K. Dave
Download or read book Recent Advances in Manufacturing Processes and Systems written by Harshit K. Dave and published by Springer Nature. This book was released on 2022-03-03 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents select proceedings of 2nd International Conference on Recent Advances in Manufacturing (RAM 2021). The book provides insights into the current research trends and development in manufacturing processes. The topics covered include conventional and nonconventional manufacturing processes, micro and nano manufacturing processes, chemical and biochemical manufacturing, additive manufacturing, smart manufacturing, and sustainable and energy-efficient manufacturing. The contributions presented here are intended to stimulate new research directions in the manufacturing domain. This book will be useful for the beginners, researchers and professionals working in the area of industrial and production engineering and allied fields.
Book Synopsis Handbook of Mechanics of Materials by : Siegfried Schmauder
Download or read book Handbook of Mechanics of Materials written by Siegfried Schmauder and published by Springer. This book was released on 2019-05-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive reference for the studies of mechanical properties of materials over multiple length and time scales. The topics include nanomechanics, micromechanics, continuum mechanics, mechanical property measurements, and materials design. The handbook employs a consistent and systematic approach offering readers a user friendly reference ideal for frequent consultation. It is appropriate for an audience at of graduate students, faculties, researchers, and professionals in the fields of Materials Science, Mechanical Engineering, Civil Engineering, Engineering Mechanics, and Aerospace Engineering.
Book Synopsis Additive Manufacturing of Metals: The Technology, Materials, Design and Production by : Li Yang
Download or read book Additive Manufacturing of Metals: The Technology, Materials, Design and Production written by Li Yang and published by Springer. This book was released on 2017-05-11 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a unique guide to the three-dimensional (3D) printing of metals. It covers various aspects of additive, subtractive, and joining processes used to form three-dimensional parts with applications ranging from prototyping to production. Examining a variety of manufacturing technologies and their ability to produce both prototypes and functional production-quality parts, the individual chapters address metal components and discuss some of the important research challenges associated with the use of these technologies. As well as exploring the latest technologies currently under development, the book features unique sections on electron beam melting technology, material lifting, and the importance this science has in the engineering context. Presenting unique real-life case studies from industry, this book is also the first to offer the perspective of engineers who work in the field of aerospace and transportation systems, and who design components and manufacturing networks. Written by the leading experts in this field at universities and in industry, it provides a comprehensive textbook for students and an invaluable guide for practitioners
Book Synopsis Auxetic Materials and Structures by : Teik-Cheng Lim
Download or read book Auxetic Materials and Structures written by Teik-Cheng Lim and published by Springer. This book was released on 2014-12-27 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book lays down the foundation on the mechanics and design of auxetic solids and structures, solids that possess negative Poisson’s ratio. It will benefit two groups of readers: (a) industry practitioners, such as product and structural designers, who need to control mechanical stress distributions using auxetic materials, and (b) academic researchers and students who intend to produce unique mechanical and other physical properties of structures using auxetic materials.
Book Synopsis Mechanics of Metamaterials with Negative Parameters by : Teik-Cheng Lim
Download or read book Mechanics of Metamaterials with Negative Parameters written by Teik-Cheng Lim and published by Springer Nature. This book was released on 2020-07-23 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses bulk solids that derive their mechanical properties not from those of their base materials, but from their designed microstructures. Focusing on the negative mechanical properties, it addresses topics that reveal the counter-intuitive nature of solids, specifically the negativity of properties that are commonly positive, such as negative bulk modulus, negative compressibility, negative hygroexpansion, negative thermal expansion, negative stiffness phase, and negative Poisson’s ratio. These topics are significant not only due to the curiosity they have sparked, but also because of the possibility of designing materials and structures that can behave in ways that are not normally expected in conventional solids, and as such, of materials that can outperform solids and structures made from conventional materials. The book includes illustrations to facilitate learning, and, where appropriate, reference tables. The presentation is didactic, starting with simple cases, followed by increasingly complex ones. It provides a solid foundation for graduate students, and a valuable resource for practicing materials engineers seeking to develop novel materials through the judicious design of microstructures and their corresponding mechanisms.
Book Synopsis Finite Element Analysis of Composite Materials using AbaqusTM by : Ever J. Barbero
Download or read book Finite Element Analysis of Composite Materials using AbaqusTM written by Ever J. Barbero and published by CRC Press. This book was released on 2013-04-18 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed from the author's graduate-level course on advanced mechanics of composite materials, Finite Element Analysis of Composite Materials with Abaqus shows how powerful finite element tools address practical problems in the structural analysis of composites. Unlike other texts, this one takes the theory to a hands-on level by actually solving
Book Synopsis Multiscale Lattices and Composite Materials: Optimal Design, Modeling and Characterization by : Fernando Fraternali
Download or read book Multiscale Lattices and Composite Materials: Optimal Design, Modeling and Characterization written by Fernando Fraternali and published by Frontiers Media SA. This book was released on 2019-11-26 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Functionally Graded Materials by : Hui-Shen Shen
Download or read book Functionally Graded Materials written by Hui-Shen Shen and published by CRC Press. This book was released on 2016-04-19 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Put a New Class of Structural Composites to UseReal Solutions for Predicting Load Initially designed as thermal barrier materials for aerospace applications and fusion reactors, functionally graded materials (FGMs) are now widely employed as structural components in extremely high-temperature environments. However, little information is commonly av
