Computer Simulation of Thermoplastic Composites Forming PDF Download

Author: Frédéric Hallé
Publisher:
ISBN:
Category : Thermoplastic composites
Languages : en
Pages : 256

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Author: D. Bhattacharyya
Publisher: Elsevier
ISBN: 0080529593
Category : Science
Languages : en
Pages : 549

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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: Hong Den Nguyen
Publisher:
ISBN:
Category :
Languages : en
Pages : 64

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Author: Corey Lynam, P. Eng.,
Publisher: DEStech Publications, Inc
ISBN: 1605950424
Category : Technology & Engineering
Languages : en
Pages : 102

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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: Peidong Han
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659333804
Category :
Languages : en
Pages : 200

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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: Hu Xiong
Publisher:
ISBN:
Category :
Languages : en
Pages : 147

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Book Description
As the pre-impregnated thermoplastic composites have recently attached increasing interest in the automotive industry for their excellent mechanical properties and their rapid cycle manufacturing process, modelling and numerical simulations of forming processes for composites parts with complex geometry is necessary to predict and optimize manufacturing practices. This thesis is devoted to modelling and simulation of the consolidation behavior during thermoplastic prepreg composites forming process. A new seven-node prismatic solid-shell element is proposed: six located at the apexes and the seventh sited at the center. A shear stain field is assumed to subdue transverse shear locking, the enhanced assumed strain method by addition of an extra displacement DOF from the central node and a reduced integration scheme are combined offering a linear varying strain field along the thickness direction to circumvent thickness locking, and an hourglass stabilization procedure is employed in order to correct the element's rank deficiency for pinching. This element permits the modelling of three-dimensional constitutive behavior of thermoplastic prepreg with the consolidation effect, which is modelled by a viscoelastic relaxation model. An intimate contact model is employed to predict the evolution of the consolidation which permits the microstructure prediction of void presented through the prepreg. Within a hyperelastic framework, several simulation tests are launched by combining the new developed finite element and the consolidation models. The comparison with conventional shell element and experimental results shows the efficiency of the proposed solid-shell element not only dealing with the in-plan deformation and bending deformation problems, but also in analyzation of the consolidation behavior, and the degree of intimate contact provides the level of consolidation by applied process conditions, which is essential for the appearance of defects in final composite part.

Author: Joseph Hitt
Publisher:
ISBN:
Category : Reinforced thermoplastics
Languages : en
Pages : 254

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Book Description

Author: Dörr, Dominik
Publisher: KIT Scientific Publishing
ISBN: 3731509989
Category : Technology & Engineering
Languages : en
Pages : 334

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Book Description
In this work, initially, the requirements on a simulation model of the non-isothermal stamp forming process of unidirectional fiber-reinforced, and thermoplastic tape laminates are investigated experimentally. On this basis, different isothermal as well as a fully coupled thermomechanical simulation model under consideration of the crystallization kinetics are developed. For validation, a complex shaped geometry is simulated and compared to experimental forming results.

Author: Suresh Advani
Publisher: Springer Science & Business Media
ISBN: 940112874X
Category : Technology & Engineering
Languages : en
Pages : 621

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Book Description
Co-published with Computational Mechanics Publications, UK. Papers presented at the Third International Conference on Computer Aided Technology Design in Composite Material Technology, University of Delaware, Newark, USA, May 1992.

Author: Japan Association for Chemical Innovation
Publisher: Springer
ISBN: 9811008159
Category : Science
Languages : en
Pages : 391

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Book Description
This book is the first to introduce a mesoscale polymer simulation system called OCTA. With its name derived from "Open Computational Tool for Advanced material technology," OCTA is a unique software product, available without charge, that was developed in a project funded by Japanese government. OCTA contains a series of simulation programs focused on mesoscale simulation of the soft matter COGNAC, SUSHI, PASTA, NAPLES, MUFFIN, and KAPSEL. When mesoscale polymer simulation is performed, one may encounter many difficulties that this book will help to overcome. The book not only introduces the theoretical background and functions of each simulation engine, it also provides many examples of the practical applications of the OCTA system. Those examples include predicting mechanical properties of plastic and rubber, morphology formation of polymer blends and composites, the micelle structure of surfactants, and optical properties of polymer films. This volume is strongly recommended as a valuable resource for both academic and industrial researchers who work in polymer simulation.