A Multi-preferred Fiber Orientation Constitutive Model for Fiber Mat Reinforced Thermoplastics with a Random Orientation Applied to the Stamp Thermo-hydroforming Process PDF Download

Author: Michael Andrew Zampaloni
Publisher:
ISBN:
Category : Fiber-reinforced plastics
Languages : en
Pages : 382

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Author: Stacey Anne Yankovich
Publisher:
ISBN:
Category : Fiber-reinforced plastics
Languages : en
Pages : 202

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Author: Barbara Nicole Rodgers
Publisher:
ISBN:
Category : Fiber-reinforced plastics
Languages : en
Pages : 180

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Author: Susanne Katrin Kugler
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Joseph Paul Greene
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Francisco Chinesta
Publisher: Springer Science & Business Media
ISBN: 2287721436
Category : Technology & Engineering
Languages : en
Pages : 236

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This book groups the main advances in material forming, considering different processes, both conventional and non-conventional. It focuses on polymers, composites and metals, which are analyzed from the state of the art. Special emphasis is devoted to the contributions of the European Scientific Association for Material Forming (ESAFORM) during the last decade and in particular the ones coming from its annual international conference.

Author: Matthias Worgull
Publisher: William Andrew
ISBN: 0815519745
Category : Technology & Engineering
Languages : en
Pages : 368

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This book is an overview of replication technology for micro- and nanostructures, focusing on the techniques and technology of hot embossing, a scaleable and multi-purpose technology for the manufacture of devices such as BioMEMS and microfluidic devices which are expected to revolutionize a wide range of medical and industrial processes over the coming decade.The hot embossing process for replicating microstructures was developed by the Forschungszentrum Karlsruhe (Karlsruhe Institute of Technology) where the author is head of the Nanoreplication Group. Worgull fills a gap in existing information by fully detailing the technology and techniques of hot embossing. He also covers nanoimprinting, a process related to hot embossing, with examples of actual research topics and new applications in nanoreplication. - A practical and theoretical guide to selecting the materials, machinery and processes involved in microreplication using hot embossing techniques - Compares different replication processes such as: micro injection molding, micro thermoforming, micro hot embossing, and nanoimprinting - Details commercially available hot embossing machinery and components like tools and mold inserts

Author: Sebastian Goris
Publisher:
ISBN:
Category :
Languages : en
Pages : 163

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Long fiber-reinforced thermoplastics have favorable mechanical properties, low manufacturing costs and superior lightweight characteristics. However, the configuration of the reinforcing fibers changes significantly throughout the entire production process, reflected in mechanisms such as fiber attrition, fiber alignment, and fiber matrix separation. The complexity of the process-microstructure-property relationship limits the use of this material class in a wider range of lightweight applications. This work presents a contribution to gain a better understanding of the underlying physics of fiber motion during molding and to obtain a theoretical link between processing and the fiber microstructure. As part of this work, novel characterization techniques were developed to overcome the shortcomings of conventional measurement approaches. The measurement concepts comprise methodologies to characterize the fiber orientation, fiber concentration and fiber length by applying sophisticated techniques, which include combining image processing with micro computed-tomography and optical measurement systems. Applying the developed measurement techniques, a range of experimental studies were conducted to investigate the process-induced fiber microstructure. Plate geometries were injection molded at varying nominal fiber concentrations to investigate fiber matrix separation, fiber alignment, and fiber breakage. The experiments revealed substantial variation in the fiber configuration and correlation between the microstructural properties. The substantial fiber matrix separation and fiber breakage found in this work refute the common assumption of uniform fiber concentration and fiber length in molded parts. Additionally, a new experimental setup based on a Couette rheometer was developed to study fiber length reduction under highly controlled conditions, which isolated the impact of processing conditions on fiber attrition. Finally, the generated experimental data are applied to evaluate models predicting the process-microstructure relationship. All models fail to provide acceptable results and the application of these models as truly predictive tools is limited. It was shown that a holistic approach is necessary to capture the process-induced change in fiber configuration, which necessarily includes the interdependencies of the microstructural properties.

Author: Glenn Parry
Publisher: Springer Science & Business Media
ISBN: 1848002254
Category : Technology & Engineering
Languages : en
Pages : 433

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Book Description
Over the past 100 years the European Automotive Industry has been repeatedly challenged by best practice. First by the United States, through the development of ‘mass production’ pioneered by Henry Ford and more recently by ‘lean production techniques’ as practised by the leading Japanese producers, particularly Toyota. It has consistently risen to these challenges and has shown it can compete and even outperform its competitors with world-class products. However, the European - dustry is now faced with growing competition and growth from new emerging low-cost countries and needs to re-define its competitive advantage to remain at the forefront of the sector. Automotive growth is driven by two factors, new m- kets and new technologies. Global competition is increasing, with technology and product differentiation becoming the most important sales factors, but with c- tinued cost pressure. Within the market the winners will be more profitable and the losers will disappear. The Automotive Industry makes a significant contribution to the socio-economic fabric of the European Union. Manufacturing output represents €700 billion and research and development spending €24 billion. European automotive suppliers number 5000 member companies and represent 5 million employees and generate €500 billion in revenues. These are significant figures that generate wealth and high value employment within the EU. European firms must consistently improve their competitive position to ensure that the industry does not migrate to growing new markets.

Author: Spiros Pantelakis
Publisher: Springer Nature
ISBN: 303035346X
Category : Technology & Engineering
Languages : en
Pages : 405

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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.