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Author: Aki Ensio Valkonen
Publisher:
ISBN: 9789517544009
Category : Deformations (Mechanics)
Languages : en
Pages : 918
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Book Description
Author: Aki Ensio Valkonen
Publisher:
ISBN: 9789517544009
Category : Deformations (Mechanics)
Languages : en
Pages : 918
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Book Description
Author: YuZhong Dai
Publisher:
ISBN:
Category : Deformations (Mechanics)
Languages : en
Pages : 346
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Book Description
Author: J.L. Raphanel
Publisher: Routledge
ISBN: 1351435744
Category : Science
Languages : en
Pages : 484
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Book Description
This volume covers topics involving large plastic deformation of metallic materials. These proceedings offer an overview of the synergism achieved by combining microstructural characterization and understanding, mechanical modelling and experiments, numerical analysis and computation.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 968
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Book Description
Author: Kranthi Balusu
Publisher:
ISBN:
Category : Deformations (Mechanics)
Languages : en
Pages : 92
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Book Description
Understanding the formation of surface roughness could help better diagnose a metal component's health and could potentially help in making better microstructure design decisions. Both of these, in turn, contribute to the design of efficient structural components. In this work, the research objective is to understand the relationship between the surface microstructure (i.e., grain orientations) and the surface-height changes in nickel polycrystals undergoing small amounts of tensile plastic deformation. The secondary objective is to determine the relationship between surface height and strain localization. Primarily simulations were used, along with experimental surface roughness observations, to validate the simulation results. Discrete dislocation plasticity (DDP) was used to simulate slip-step-type surface roughness, and the crystal plasticity finite element method (CPFEM) was used to simulate grain-scale surface roughness. Electron backscatter diffraction (EBSD) characterized the microstructure on the surface, and surface white light interferometer (SWLI) measured the surface heights of deformed samples. Randall Kelton, a Ph.D. candidate in Material science and Engineering, performed experiments and I focused primarily on simulations and analysis of experimental data.The first phase of the work has an emphasis on simulating the surface roughness at the scale of the slip steps. Calculation of stress fields associated with dislocations at the surface is essential in the simulation of slip-step formation. So, a novel, efficient way to simulate stress fields of dislocations at the free surface of 3D elastic, anisotropic materials was devised. Subsequently, it was found that DDP can only generate results at a much smaller scale than that of this study's experimental surface-height measurements.In the second part of this work, the focus shifts to roughness at a greater length scale, the grain scale. First, the effect of grain orientation on its surface height was investigated, ignoring the role of the interaction of neighboring grains in roughness formation. Experimental and simulations have revealed that the plastic hardness of a grain does not determine the grain-surface height as previously thought. It was found that the plastic deformation of the grain's most stressed slip systems along the direction normal to the surface determines a grain's surface height. Simulations also indicated that plastic strains of a grain in the loading direction are not be related to its surface height. However, plastic strains in the other two directions can be potentially estimated using surface heights. For many grain orientations, simulating the grain itself does not produce the experimentally observed surface behavior. The neighboring grains were found to be highly influential in determining a grain's surface height, especially the grains lying underneath the surface up to depths of 3-4 grain diameters. Thus, discrepancies between experiments and simulations are justified. While doing so, it was also found that a few specific grain orientations exhibit the same surface behavior irrespective of the neighboring grains.The studies conducted in this research have led to an understanding of grain-scale surface roughness formation, and as a result, the limitations in predicting surface roughness using surface-grain orientations are that surface-height data can make only a limited diagnosis of strain localization.
Author: Ricardo Alves de Sousa
Publisher: Trans Tech Publications Ltd
ISBN: 3038261009
Category : Technology & Engineering
Languages : en
Pages : 2600
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Book Description
Volume is indexed by Thomson Reuters CPCI-S (WoS). The collection of 282 peer reviewed papers aims to promote the interest for all types of materials and all topics connected to Material Forming. The papers are grouped as follows: Chapter 1: Formability of Metallic Materials Chapter 2: Forging and Rolling; Chapter 3: Composites Forming Processes; Chapter 4: Semi-Solid Processes; Chapter 5: Light Weight Design and Energy Efficiency in Metal Forming; Chapter 6: New and Advanced Numerical Strategies for Material Forming; Chapter 7: Extrusion and Drawing; Chapter 8: Friction and Wear in Material Processing; Chapter 9: Nano-Structured Materials and Microforming; Chapter 10: Inverse Analysis Optimization and Stochastic Approaches; Chapter 11: Innovative Joining by Forming Technologies; Chapter 12: Multiscale & Continuum Constitutive Modelling; Chapter 13: Incremental and Sheet Metal Forming; Chapter 14: Sheet-Bulk-Metal Forming; Chapter 15: Heat Transfer Modelling; Chapter 16: Structures, Properties and Processing of Polymers; Chapter 17: Non-Conventional Processes; Chapter 18: Machining and Cutting; Chapter 19: Integrated Design, Modelling and Reliability Assessment in Forming (I-DMR); Chapter 20: Finite Element Technology and Multi-Scale Methods for Composites, Metallic Sheets and Coating Models; Chapter 21: Intelligent Computation in Forming Processes.
Author: T. Abe
Publisher: Elsevier
ISBN: 0080984568
Category : Science
Languages : en
Pages : 939
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Book Description
AEPA '96 provides a forum for discussion on the state-of-art developments in plasticity. Anemphasis is placed on the close interaction of the theories from macroplasticity,mesoplasticity and microplasticity together with their applications in various engineeringdisciplines such as solid mechanics, metal forming, structural analysis, geo-mechanics andmicromechanics. These proceedings include over 140 papers from the conference includingcase studies showing applications of plasticity in inter-disciplinary or nonconventional areas.
Author: Ken-ichi Manabe
Publisher: MDPI
ISBN: 3039431587
Category : Technology & Engineering
Languages : en
Pages : 206
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Book Description
The miniaturization of industrial products is a global trend. Metal forming technology is not only suitable for mass production and excellent in productivity and cost reduction, but it is also a key processing method that is essential for products that utilize advantage of the mechanical and functional properties of metals. However, it is not easy to realize the processing even if the conventional metal forming technology is directly scaled down. This is because the characteristics of materials, processing methods, die and tools, etc., vary greatly with miniaturization. In metal micro forming technology, the size effect of major issues for micro forming have also been clarified academically. New processing methods for metal micro forming have also been developed by introducing new special processing techniques, and it is a new wave of innovation toward high precision, high degree of processing, and high flexibility. To date, several special issues and books have been published on micro-forming technology. This book contains 11 of the latest research results on metal micro forming technology. The editor believes that it will be very useful for understanding the state-of-the-art of metal micro forming technology and for understanding future trends.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1132
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Book Description
Author: Weicheng Cui
Publisher: Springer
ISBN: 3642418317
Category : Technology & Engineering
Languages : en
Pages : 289
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Book Description
In order to apply the damage tolerance design philosophy to design marine structures, accurate prediction of fatigue crack growth under service conditions is required. Now, more and more people have realized that only a fatigue life prediction method based on fatigue crack propagation (FCP) theory has the potential to explain various fatigue phenomena observed. In this book, the issues leading towards the development of a unified fatigue life prediction (UFLP) method based on FCP theory are addressed. Based on the philosophy of the UFLP method, the current inconsistency between fatigue design and inspection of marine structures could be resolved. This book presents the state-of-the-art and recent advances, including those by the authors, in fatigue studies. It is designed to lead the future directions and to provide a useful tool in many practical applications. It is intended to address to engineers, naval architects, research staff, professionals and graduates engaged in fatigue prevention design and survey of marine structures, in fatigue studies of materials and structures, in experimental laboratory research, in planning the repair and maintenance of existing structures, and in rule development. The book is also an effective educational aid in naval architecture, marine, civil and mechanical engineering. Prof. Weicheng Cui is the Dean of Hadal Science and Technology Research Center of Shanghai Ocean University, China. Dr. Xiaoping Huang is an associate professor of School of Naval Architecture, Ocean and Civil Engineering of Shanghai Jiao Tong University, China. Dr. Fang Wang is an associate professor of Hadal Science and Technology Research Center of Shanghai Ocean University, China.
