Thermo Mechanical Modeling Of Additive Manufacturing

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Author: Michael Gouge
Publisher: Butterworth-Heinemann
ISBN: 0128118210
Size: 53.64 MB
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Thermo Mechanical Modeling Of Additive Manufacturing by Michael Gouge


Original Title: Thermo Mechanical Modeling Of Additive Manufacturing

Thermo-mechanical Modeling of Additive Manufacturing provides the background, methodology and description of modeling techniques to enable the reader to perform their own accurate and reliable simulations of any additive process. Part I provides an in depth introduction to the fundamentals of additive manufacturing modeling, a description of adaptive mesh strategies, a thorough description of thermal losses and a discussion of residual stress and distortion. Part II applies the engineering fundamentals to direct energy deposition processes including laser cladding, LENS builds, large electron beam parts and an exploration of residual stress and deformation mitigation strategies. Part III concerns the thermo-mechanical modeling of powder bed processes with a description of the heat input model, classical thermo-mechanical modeling, and part scale modeling. The book serves as an essential reference for engineers and technicians in both industry and academia, performing both research and full-scale production. Additive manufacturing processes are revolutionizing production throughout industry. These technologies enable the cost-effective manufacture of small lot parts, rapid repair of damaged components and construction of previously impossible-to-produce geometries. However, the large thermal gradients inherent in these processes incur large residual stresses and mechanical distortion, which can push the finished component out of engineering tolerance. Costly trial-and-error methods are commonly used for failure mitigation. Finite element modeling provides a compelling alternative, allowing for the prediction of residual stresses and distortion, and thus a tool to investigate methods of failure mitigation prior to building. Provides understanding of important components in the finite element modeling of additive manufacturing processes necessary to obtain accurate results Offers a deeper understanding of how the thermal gradients inherent in additive manufacturing induce distortion and residual stresses, and how to mitigate these undesirable phenomena Includes a set of strategies for the modeler to improve computational efficiency when simulating various additive manufacturing processes Serves as an essential reference for engineers and technicians in both industry and academia

Thermo Mechanical Model Development And Experimental Validation For Directed Energy Deposition Additive Manufacturing Processes

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Author: Jarred Heigel
Publisher:
ISBN:
Size: 33.60 MB
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Thermo Mechanical Model Development And Experimental Validation For Directed Energy Deposition Additive Manufacturing Processes by Jarred Heigel


Original Title: Thermo Mechanical Model Development And Experimental Validation For Directed Energy Deposition Additive Manufacturing Processes

Additive manufacturing (AM) enables parts to be built through the layer-by-layer addition of molten metal. In directed energy deposition (DED) AM, metal powder or wire is added into a melt pool that follows a pattern to fill in the cross section of the part. When compared to traditional manufacturing processes, AM has manyadvantages such as the ability to make internal features and to repair high-value parts. However, the large thermal gradients generated by AM result in plastic deformation. Thermo-mechanical models must be developed to predict the temperature and distortion produced by this process.Thermo-mechanical models have been developed for AM by several investigators. These models are often validated by measuring the temperatures during the deposition of a small part and the final distortion of the part. Unfortunately this is not a sufficientvalidation method for the non-linear thermo-mechanical model. Although good agreement between the thermal model and the temperatures measured during a small depositions can be achieved, it does not necessarily mean that the model will be accurate for an industrially relevant part that requires 10^2 - 10^4 tracks and hours of processing time. The relatively small deviations between the model and the validation will propagate when modeling large depositions and could produce inaccurate results. The errors in a large part will be increased further if the assumptions made of thethermal boundary conditions are not appropriate for the system.The objective of this work is to develop and experimentally validate thermo-mechanical models for DED. Experiments are performed to characterize the distortion induced by laser cladding. The depositions require many tracks and nearly an hour of processing time, during which the temperature and the deflection are measured in situ so that the response of the plate to each deposition track is understood. Measurements are then made of the convection caused by two different laser deposition heads. Thermo-mechanical models are developed by implementing the measured rate of convective heat transfer and the temperature dependent material properties. The models are validated using in situ measurements of the temperatureand the deflection generated during the process, as well as post-process measurements of the residual stress and the distortedshape. Finally, experiments and models are used to investigate the impact of feedstock selection, either powder or wire, on the DEDprocess.

Laser Based Additive Manufacturing Of Metal Parts

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Author: Linkan Bian
Publisher: CRC Press
ISBN: 1351647482
Size: 40.88 MB
Format: PDF
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Laser Based Additive Manufacturing Of Metal Parts by Linkan Bian


Original Title: Laser Based Additive Manufacturing Of Metal Parts

Laser-Based Additive Manufacturing (LBAM) technologies, hailed by some as the "third industrial revolution," can increase product performance, while reducing time-to-market and manufacturing costs. This book is a comprehensive look at new technologies in LBAM of metal parts, covering topics such as mechanical properties, microstructural features, thermal behavior and solidification, process parameters, optimization and control, uncertainty quantification, and more. The book is aimed at addressing the needs of a diverse cross-section of engineers and professionals.

Minimization Of Welding Distortion And Buckling

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Author: Pan Michaleris
Publisher: Elsevier
ISBN: 0857092901
Size: 36.88 MB
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Minimization Of Welding Distortion And Buckling by Pan Michaleris


Original Title: Minimization Of Welding Distortion And Buckling

Welding is a cost-effective and flexible method of fabricating large structures, but drawbacks such as residual stress, distortion and buckling must be overcome in order to optimize structural performance. Minimization of welding distortion and buckling provides a systematic overview of the methods of minimizing distortion and buckling in welded structures. Following an introductory chapter, part one focuses on understanding welding stress and distortion, with chapters on such topics as computational welding mechanics, modelling the effect of phase transformations on welding stress and distortion and using computationally efficient reduced-solution methods to understand welding distortion. Part two covers different methods of minimizing welding distortion. Chapters discuss methods such as differential heating for minimizing distortion in welded stiffeners, dynamic thermal tensioning, reverse-side heating and ways of minimizing buckling such as weld cooling and hybrid laser arc welding. With its distinguished editor and international team of contributors, Minimization of welding distortion and buckling is an essential reference for all welders and engineers involved in fabrication of metal end-products, as well as those in industry and academia with a research interest in the area. Provides a systematic overview of the methods of minimizing distortion and buckling in welded structures Focuses on understanding welding stress and distortion featuring computational welding mechanics and modelling the effect of phase transformations Explores different methods of minimizing welding distortion discussing differential heating and dynamic thermal tensioning

Industrializing Additive Manufacturing Proceedings Of Additive Manufacturing In Products And Applications Ampa2017

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Author: Mirko Meboldt
Publisher: Springer
ISBN: 3319668668
Size: 15.99 MB
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Industrializing Additive Manufacturing Proceedings Of Additive Manufacturing In Products And Applications Ampa2017 by Mirko Meboldt


Original Title: Industrializing Additive Manufacturing Proceedings Of Additive Manufacturing In Products And Applications Ampa2017

These proceedings exchange ideas and knowledge among engineers, designers and managers on how to support real-world value chains by developing additive manufactured series products. The papers from the conference show a holistic, multidisciplinary view.

Mechanics Of Additive And Advanced Manufacturing Volume 9

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Author: Junlan Wang
Publisher: Springer
ISBN: 3319628348
Size: 18.64 MB
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Mechanics Of Additive And Advanced Manufacturing Volume 9 by Junlan Wang


Original Title: Mechanics Of Additive And Advanced Manufacturing Volume 9

Mechanics of Additive and Advanced Manufacturing, Volume 9 of the Proceedings of the 2017 SEM Annual Conference & Exposition on Experimental and Applied Mechanics, the ninth volume of nine from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies, including: Design, Optimization Experiments Computations Materials for Advanced Manufacturing Processes (3D printing, micro- and nano-manufacturing, powder bed fusion, directed energy deposition, etc.) Mechanics Aspects of Advanced Manufacturing (e.g. mechanical properties, residual stress, deformation, failure, rate-dependent mechanical behavior, etc.)

Mechanics Of Composite And Multi Functional Materials Volume 7

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Author: W. Carter Ralph
Publisher: Springer
ISBN: 3319417665
Size: 78.36 MB
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Mechanics Of Composite And Multi Functional Materials Volume 7 by W. Carter Ralph


Original Title: Mechanics Of Composite And Multi Functional Materials Volume 7

Mechanics of Composite, Hybrid, and Multifunctional Materials, Volume 7 of the Proceedings of the 2016 SEM Annual Conference & Exposition on Experimental and Applied Mechanics, the seventh volume of ten from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on a wide range of areas, including: Recycled-Constituent Composites Nano and Particulate Composites Damage Detection and Non-Destructive Evaluation of Composites Fracture and Fatigue Novel Developments in Composites Additive Manufacturing of Composites Mechanics of Graphene & Graphene Oxide Smart Materials Novel Developments in Composites Manufacturing and Joining of Composites

Solid Freeform And Additive Fabrication 2000

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Author: Stephen C. Danforth
Publisher: Cambridge University Press
ISBN: 9781558995338
Size: 33.14 MB
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Solid Freeform And Additive Fabrication 2000 by Stephen C. Danforth


Original Title: Solid Freeform And Additive Fabrication 2000

This book brings together experts in the field to discuss recent developments in (solid freeform) SFF and additive methods for fabricating metals, ceramics, polymers, and composites. It focuses on processing-structure-property relationships and relevant materials modeling approaches. Methods ranging from laser chemical vapor deposition (LCVD) to ink-jet based processes are presented. The entire range of materials, i.e., polymeric, metallic and ceramic components for structural, biological, and electronic applications, are also addressed, as are applications of these advanced processing techniques. A joint session with Symposium V, Materials Development for Direct Write Technologies, is included in the proceedings and features materials approaches that are currently being developed for fabricating mesoscopic integrated conformal electronics (MICE). These papers describe materials and methods to fabricate passive electronic devices (such as conductors, insulators and capacitors) on conformal surfaces at temperatures below 400°C. Topics include: direct metal fabrication; tooling and photo processing; direct patterning; composites and ceramics; and ceramics and solution processes.

Additive Manufacturing Handbook

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Author: Adedeji B. Badiru
Publisher: CRC Press
ISBN: 1351645390
Size: 64.70 MB
Format: PDF
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Additive Manufacturing Handbook by Adedeji B. Badiru


Original Title: Additive Manufacturing Handbook

Theoretical and practical interests in additive manufacturing (3D printing) are growing rapidly. Engineers and engineering companies now use 3D printing to make prototypes of products before going for full production. In an educational setting faculty, researchers, and students leverage 3D printing to enhance project-related products. Additive Manufacturing Handbook focuses on product design for the defense industry, which affects virtually every other industry. Thus, the handbook provides a wide range of benefits to all segments of business, industry, and government. Manufacturing has undergone a major advancement and technology shift in recent years.

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