Download or read book Nonlinear Modeling and Simulation of Radial Forging Process written by Jian Chen and published by . This book was released on 2011 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Radial forging is an important manufacturing process to produce large cannon barrels. It is used to improve the material properties and reduce the porosity of the billet. The objective of this study is to develop finite element models to investigate the behavior of the workpiece and predict the elimination of void defects in the radial forging process. A nonlinear coupled finite element model has been developed to study the behavior of a large-diameter tube subjected to mechanical and thermal loadings in hot radial forging. The model is formulated in a three-dimensional frame, accounting for both axial and circumferential effects. A rate-dependent material model is used to describe the viscoplastic behavior of a workpiece subject to high temperature and large strain. The simulation results are compared with previously published experimental and two dimensional axi-symmetric simulation results. This work also develops a comprehensive three-dimensional model to predict the degree to which void defects are eliminated in the cold rolling process. It compares experimental results to the finite element predictions to validate the model. The void reduction predictions of the finite element analysis agree closely with the experimental findings. Neural network has been used to establish the relationship between the process parameters and the void reduction. Finally the previous model has been extended to examine the mechanism of void deformation subjected to large deformation in hot radial forging. It investigates systematically the effects of void location, mandrel, die shape, and reduction in tube thickness on the final void reduction. The model is verified by comparison with experimental findings. All the simulation results provide a valuable procedure for the design of the hot radial forging process"--Abstract, leaf iv.

Download or read book Modeling Analysis and Control of Hydraulic Actuator for Forging written by Xinjiang Lu and published by Springer. This book was released on 2017-12-30 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes load modeling approaches for complex work pieces and batch forgings, and demonstrates analytical modeling and data-driven modeling approaches for known and unknown complex forging processes. It overcomes the current shortcomings of modeling, analysis and control approaches, presenting contributions in three major areas: In the first, several novel modeling approaches are proposed: a process/shape-decomposition modeling method to help estimate the deformation force; an online probabilistic learning machine for the modeling of batch forging processes; and several data-driven identification and modeling approaches for unknown forging processes under different work conditions. The second area develops model-based dynamic analysis methods to derive the conditions of stability and creep. Lastly, several novel intelligent control methods are proposed for complex forging processes. One of the most serious problems in forging forming involves the inaccurate forging conditions, velocity and position offered by the hydraulic actuator due to the complexity of both the deformation process of the metal work piece and the motion process of the hydraulic actuator. The book summarizes the current weaknesses of modeling, analysis and control approaches. are summarized as follows: a) With the current modeling approaches it is difficult to model complex forging processes with unknown parameters, as they only model the dynamics in local working areas but do not effectively model unknown nonlinear systems across multiple working areas; further, they do not take the batch forging process into account, let alone its distribution modeling. b) All previous dynamic analysis studies simplify the forging system to having a single-frequency pressure fluctuation and neglect the influences of non-linear load force. Further, they fail to take the flow equation in both valves and cylinders into account. c) Conventional control approaches only consider the linear deformation force and pay no attention to sudden changes and the motion synchronization for the multi-cylinder system, making them less effective for complex, nonlinear time-varying forging processes subject to sudden changes.

Download or read book Modeling and Simulation of Nonferrous Alloy Forging Processes written by CSA Journal Division and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling and Simulation of Nonferrous Alloy Forging Processes written by Craig Emerson and published by . This book was released on 2009-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1973 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Stress Development in Axi symmetric Products Processed by Radial Forging Using 3 D Nonlinear FEM written by Jenn-Hann Liou and published by . This book was released on 1997 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling and Simulation of Nonferrous Alloy Forging Processes 2007 Ed written by Technology Research Editors and published by Search-In-Print. This book was released on 2007-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling and Simulation of Nonferrous Alloy Forging Processes written by Technology Research Editors and published by Search-In-Print. This book was released on 2006-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Material Forming written by Lukasz Madej and published by Materials Research Forum LLC. This book was released on 2023-04-25 with total page 2163 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings present papers on Additive Manufacturing, Composites Forming Processes, Extrusion and Drawing, Forging and Rolling, Formability of Metallic Materials, Friction and Wear in Metal Forming, Incremental and Sheet Metal Forming, Innovative Joining by Forming Technologies, Lionel Fourment MS on Optimization and Inverse Analysis in Forming, Machining and Cutting, Material Behavior Modelling, New and Advanced Numerical Strategies for Material Forming, Non-Conventional Processes, Polymer Processing and Thermomechanical Properties, Sustainability on Material Forming, and Property-Controlled Forming.

Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Stress Development in Axi Symmetric Products Processed by Radial Forging Using 3 D Nonlinear FEM written by J. H. Liou and published by . This book was released on 2000 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CAD CAM Abstracts written by and published by . This book was released on 1992 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advanced Materials Processes written by and published by . This book was released on 1993-07 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Refining and Casting of Steel written by Karel Gryc and published by MDPI. This book was released on 2020-11-09 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel has become the most requested material all over the world during the rapid technological evolution of recent centuries. As our civilization grows and its technological development becomes connected with more demanding processes, it is more and more challenging to fit the required physical and mechanical properties for steel in its huge portfolio of grades for each steel producer. It is necessary to improve the refining and casting processes continuously to meet customer requirements and to lower the production costs to remain competitive. New challenges related to both the precise design of steel properties and reduction in production costs are combined with paying special attention to environmental protection. These contradictory demands are the theme of this book.

Download or read book Computational Structural Mechanics Fluid Dynamics written by A.K. Noor and published by Elsevier. This book was released on 2013-10-22 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational structural mechanics (CSM) and computational fluid dynamics (CFD) have emerged in the last two decades as new disciplines combining structural mechanics and fluid dynamics with approximation theory, numerical analysis and computer science. Their use has transformed much of theoretical mechanics and abstract science into practical and essential tools for a multitude of technological developments which affect many facets of our life. This collection of over 40 papers provides an authoritative documentation of major advances in both CSM and CFD, helping to identify future directions of development in these rapidly changing fields. Key areas covered are fluid structure interaction and aeroelasticity, CFD technology and reacting flows, micromechanics, stability and eigenproblems, probabilistic methods and chaotic dynamics, perturbation and spectral methods, element technology (finite volume, finite elements and boundary elements), adaptive methods, parallel processing machines and applications, and visualization, mesh generation and artificial intelligence interfaces.

Download or read book Numerical Methods in Industrial Forming Processes written by Jan Kusiak and published by Springer Nature. This book was released on with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: