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Thermo-Mechanical Modeling of Additive Manufacturing

Thermo-Mechanical Modeling of Additive Manufacturing
A Book

by Michael Gouge,Pan Michaleris

  • Publisher : Butterworth-Heinemann
  • Release : 2017-08-03
  • Pages : 294
  • ISBN : 0128118210
  • Language : En, Es, Fr & De
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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

Thermo-mechanical Model Development and Experimental Validation for Directed Energy Deposition Additive Manufacturing Processes
A Book

by Jarred Heigel

  • Publisher : Unknown Publisher
  • Release : 2015
  • Pages : 329
  • ISBN : 9876543210XXX
  • Language : En, Es, Fr & De
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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.

Thermo-mechanical Modeling of Metallic Substrates Around Laser-induced Melt Pools

Thermo-mechanical Modeling of Metallic Substrates Around Laser-induced Melt Pools
A Book

by Yi Shu

  • Publisher : Unknown Publisher
  • Release : 2020
  • Pages : 329
  • ISBN : 9876543210XXX
  • Language : En, Es, Fr & De
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Additive manufacturing (AM) has introduced new possibilities of creating sophisticated designs and structures. Selective Laser Melting (SLM) is an AM technique where structures are fabricated by selectively melting and fusing powder layers. In SLM, melt pools are induced by a laser beam moving on the top surface of a substrate submerged in a powder bed. Mechanical properties of additively manufactured metallic parts are known to be strongly affected by thermal histories, and residual stresses arise due to large temperature gradients. Thermo-mechanical models would help to gain information about both, which is usually hard to obtain. This thesis focuses on examining how well thermal histories and residual stresses in metallic substrates around laser-induced melt pools can be computed by thermo-mechanical models, through experiments on substrates of 17-4PH Stainless Steel (SS) and Ti-6Al-4V. In the first set of experiments, one of two different laser beams moves with constant velocity and power over substrates of 17-4PH SS or Ti-6Al-4V. The substrates are sectioned and etched to expose melt pool traces. In the second set of experiments, single-pass lasers move with constant velocity and power on top surfaces of 17-4PH SS substrates. The time evolution of the deflection of substrates are recorded with a high speed camera. Two types of heat transfer models (accounting for and not accounting for convective heat transfer through fluid flow) reproduced the melt pool traces in the first set of experiments. Predicted thermal histories were critically analyzed. As an extension, how well the model accounting for convective heat transfer reproduced the effect of a substrate edge on the melt pool was examined. Later, the model without convective heat transfer was applied to real-time ultrasonic monitoring of a melt pool in metallic substrates. For the second set of experiments, the model based on heat conduction and elasto-viscoplasticity reproduced the time evolution of deflection of 17-4PH SS substrates. The contributions of this thesis are as follows. Through experiments with various combinations of laser power, scanning speed, power density distribution and metallic material, we show that simply reproducing melt pool traces is insufficient to determine thermal histories. Specifically, for a non-axisymmetric laser beam, three-dimensional melt pool shapes can be disparate even if their two-dimensional traces are very similar. Convective heat transfer in laser-induced melt pools cannot be completely ignored, otherwise there may be inconsistencies between the model and experiment conditions, as well as distortion of thermal histories related to phase transformation. With experiments of laser melting tracks near edges of substrates, we demonstrate that the model accounting for convective heat transfer can consistently reproduce melt pool traces affected by a substrate's edge. We have proven the existence of scattering waves by the presence of a melt pool through simulation, for a possibility of monitoring the state of laser-induced melt pool in real-time with ultrasound. We have designed deflection experiments of metallic substrates monitored by a high-speed camera, which would benefit calibrating thermo-mechanical models for residual stresses because of the substrate's simple thermal and mechanical history. By reproducing the deflection experiments with the model based on heat conduction and elasto-viscoplasticity, we conclude that the solid state phase transformation plays an indispensable role in the evolution of residual stresses of 17-4PH SS. We also highlight the necessity of monitoring time evolution instead of the end state when evaluating models for residual stress of alloys with volume change during phase transformation.

3D Printing

3D Printing
A Book

by Dragan Cvetković

  • Publisher : BoD – Books on Demand
  • Release : 2018-10-10
  • Pages : 196
  • ISBN : 1789239656
  • Language : En, Es, Fr & De
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This book, "3D Printing", is divided into two parts: the first part is devoted to the relationship between 3D printing and engineering, and the second part shows the impact of 3D printing on the medical sector in general. There are five sections in the first part (sections are dedicated to stereolithography, new techniques of high-resolution 3D printing, application of 3D printers in architecture and civil engineering, the additive production with the metal components and the management of production by using previously mentioned technology in more complex ways). There are four chapters in the second part with the following topics: education of medical staff through surgical simulations, tissue engineering and potential applications of 3D printing in ophthalmology and orthopedics.

Mechanics of Composite and Multi-functional Materials, Volume 7

Mechanics of Composite and Multi-functional Materials, Volume 7
Proceedings of the 2016 Annual Conference on Experimental and Applied Mechanics

by W. Carter Ralph,Raman Singh,Gyaneshwar Tandon,Piyush R. Thakre,Pablo Zavattieri,Yong Zhu

  • Publisher : Springer
  • Release : 2016-11-03
  • Pages : 307
  • ISBN : 3319417665
  • Language : En, Es, Fr & De
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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

Nonlinear Finite Element Modeling of Transient Thermo- Mechanical Behavior in Selective Laster Melting

Nonlinear Finite Element Modeling of Transient Thermo- Mechanical Behavior in Selective Laster Melting
A Book

by Zhibo Luo

  • Publisher : Unknown Publisher
  • Release : 2020
  • Pages : 329
  • ISBN : 9876543210XXX
  • Language : En, Es, Fr & De
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"Selective laser melting (SLM) is a commonly used powder bed fusion (PBF) additive manufacturing (AM) process that fabricates a part through layer-wised method. Due to its ability to build customized and complex parts, SLM process has been broadly studied and applied in both academia and industry. However, rapidly changing thermal cycles and extremely high-temperature gradients in the melt pool induce a periodically changed thermal stress in solidified layers. Different types of manufacturing defects can be induced by this laser melting and layer-wised manufacturing method. These defects are controlled by different process parameters and can be minimized through optimizing these parameters. The high cost is typically the result of experimental trial-and-error methods when they are used to optimize the related process parameters. Therefore, most studies focus on developing numerical methods to estimate transient temperatures and thermal stress distributions in the melt pool and powder bed. The big challenge in the numerical thermo-mechanical analysis of a part during the SLM process is to reduce its high computational cost. The high computational cost origins from the non-linear thermo-elasto-plastic material behavior during the fabrication process, fast laser melting and solidification process, and dynamically changed build domain. Though some numerical methods, such as multiscale method and inherent strain method, have been utilized to model the SLM process, these methods cannot incorporate the influences of many process parameters such as the scanning pattern and scanning speed. In this research, an efficient thermo-mechanical finite element (FE) method aiming to reduce the computational cost is developed to model the SLM process at part level. This simulation scheme is based on an open source FE library named Deal.II, which supports adaptive mesh refinement and parallel computing. High computational cost mainly originates from large cell number and time step number. To reduce the computational cost, the Gaussian line heat source (GLHS) model with a proper time step length was developed to replace the conventional used moving Gaussian point heat source (GPHS) model. In addition, several mesh strategies were developed to reduce the total cell number and timestep number from scanning track level, layer level, and part level, respectively. To achieve a compromise between computational efficiency and solution accuracy, a hybrid of GLHS and GPHS was developed as the input heat flux. The modeling results validated the robustness of the hybrid model. To further improve solution accuracy, temperature-dependent material properties were used and the developed adaptive mesh strategy could always capture the effective heat input by increasing the mesh density around the heat source region. After transient thermal analysis of each step, a thermo-elasto-plastic constitutive model was established to predict the quasi-static mechanical behavior of the material and to calculate the deformation and thermal stress of the deposited layers. A scanning path file was designed to include all necessary process parameters and was used to guide the simulation process track-by-track and layer-by-layer. In summary, the simulation speed is 12 ~ 18 folds faster compared with the conventional simulation scheme. The simulation results were compared with experimental results. The comparison demonstrated that each point in the simulation experienced the same thermo-mechanical cycles as in the experiment. Therefore, the developed simulation scheme in this research can be used to optimize the process parameters, such as scanning pattern, scanning speed, and layer thickness. It also has the potential to be easily extended into other PBF based AM processes"--

Progress in Metal Additive Manufacturing and Metallurgy

Progress in Metal Additive Manufacturing and Metallurgy
A Book

by Robert Pederson

  • Publisher : MDPI
  • Release : 2020-12-03
  • Pages : 224
  • ISBN : 3039436635
  • Language : En, Es, Fr & De
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The advent of additive manufacturing (AM) processes applied to the fabrication of structural components creates the need for design methodologies supporting structural optimization approaches that take into account the specific characteristics of the process. While AM processes enable unprecedented geometrical design freedom, which can result in significant reductions of component weight, on the other hand they have implications in the fatigue and fracture strength due to residual stresses and microstructural features. This is linked to stress concentration effects and anisotropy that still warrant further research. This Special Issue of Applied Sciences brings together papers investigating the features of AM processes relevant to the mechanical behavior of AM structural components, particularly, but not exclusively, from the viewpoints of fatigue and fracture behavior. Although the focus of the issue is on AM problems related to fatigue and fracture, articles dealing with other manufacturing processes with related problems are also be included.

Precision Metal Additive Manufacturing

Precision Metal Additive Manufacturing
A Book

by Richard Leach,Simone Carmignato

  • Publisher : CRC Press
  • Release : 2020-09-21
  • Pages : 404
  • ISBN : 0429791275
  • Language : En, Es, Fr & De
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Additive manufacturing (AM) is a fast-growing sector with the ability to evoke a revolution in manufacturing due to its almost unlimited design freedom and its capability to produce personalised parts locally and with efficient material use. AM companies, however, still face technological challenges such as limited precision due to shrinkage, built-in stresses and limited process stability and robustness. Moreover, often post-processing is needed due to high roughness and remaining porosity. Qualified, trained personnel are also in short supply. In recent years, there have been dramatic improvements in AM design methods, process control, post-processing, material properties and material range. However, if AM is going to gain a significant market share, it must be developed into a true precision manufacturing method. The production of precision parts relies on three principles: Production is robust (i.e. all sensitive parameters can be controlled). Production is predictable (for example, the shrinkage that occurs is acceptable because it can be predicted and compensated in the design). Parts are measurable (as without metrology, accuracy, repeatability and quality assurance cannot be known). AM of metals is inherently a high-energy process with many sensitive and inter-related process parameters, making it susceptible to thermal distortions, defects and process drift. The complete modelling of these processes is beyond current computational power, and novel methods are needed to practicably predict performance and inform design. In addition, metal AM produces highly textured surfaces and complex surface features that stretch the limits of contemporary metrology. With so many factors to consider, there is a significant shortage of background material on how to inject precision into AM processes. Shortage in such material is an important barrier for a wider uptake of advanced manufacturing technologies, and a comprehensive book is thus needed. This book aims to inform the reader how to improve the precision of metal AM processes by tackling the three principles of robustness, predictability and metrology, and by developing computer-aided engineering methods that empower rather than limit AM design. Richard Leach is a professor in metrology at the University of Nottingham and heads up the Manufacturing Metrology Team. Prior to this position, he was at the National Physical Laboratory from 1990 to 2014. His primary love is instrument building, from concept to final installation, and his current interests are the dimensional measurement of precision and additive manufactured structures. His research themes include the measurement of surface topography, the development of methods for measuring 3D structures, the development of methods for controlling large surfaces to high resolution in industrial applications and the traceability of X-ray computed tomography. He is a leader of several professional societies and a visiting professor at Loughborough University and the Harbin Institute of Technology. Simone Carmignato is a professor in manufacturing engineering at the University of Padua. His main research activities are in the areas of precision manufacturing, dimensional metrology and industrial computed tomography. He is the author of books and hundreds of scientific papers, and he is an active member of leading technical and scientific societies. He has been chairman, organiser and keynote speaker for several international conferences, and received national and international awards, including the Taylor Medal from CIRP, the International Academy for Production Engineering.

Composite Materials and Material Engineering II

Composite Materials and Material Engineering II
A Book

by Xiao Hong Zhu

  • Publisher : Trans Tech Publications Ltd
  • Release : 2018-08-15
  • Pages : 312
  • ISBN : 3035732965
  • Language : En, Es, Fr & De
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The 3rd International Conference on Composite Materials and Material Engineering (ICCMME 2018) Selected, peer reviewed papers from the 3rd International Conference on Composite Materials and Material Engineering (ICCMME2018), January 26-28, 2018, Singapore

Recent Development in Machining, Materials and Mechanical Technologies III

Recent Development in Machining, Materials and Mechanical Technologies III
A Book

by Huy Bich Nguyen

  • Publisher : Trans Tech Publications Ltd
  • Release : 2019-10-24
  • Pages : 160
  • ISBN : 3035734828
  • Language : En, Es, Fr & De
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This volume contains the selected papers presented at the 2018 International Conference on Machining, Materials and Mechanical Technologies (IC3MT 2018), which was held in Ho Chi Minh City, Vietnam on 19th-22nd of September 2018. We hope this collection will be interesting and useful for many researchers and engineers from various fields of materials science and mechanical engineering.

3D Printing of Non-Metallic Materials

3D Printing of Non-Metallic Materials
A Book

by Robert J. Lancaster,Alessandro Fortunato,Stanislav Kolisnychenko

  • Publisher : Trans Tech Publications Ltd
  • Release : 2021-01-20
  • Pages : 514
  • ISBN : 3035735042
  • Language : En, Es, Fr & De
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Aggregated Book

Laser-Based Additive Manufacturing of Metal Parts

Laser-Based Additive Manufacturing of Metal Parts
Modeling, Optimization, and Control of Mechanical Properties

by Linkan Bian,Nima Shamsaei,John Usher

  • Publisher : CRC Press
  • Release : 2017-08-09
  • Pages : 328
  • ISBN : 1351647482
  • Language : En, Es, Fr & De
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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.

Mathematical Modeling in Cultural Heritage

Mathematical Modeling in Cultural Heritage
MACH2019

by Elena Bonetti,Cecilia Cavaterra,Roberto Natalini,Margherita Solci

  • Publisher : Springer
  • Release : 2021-02-04
  • Pages : 164
  • ISBN : 9783030580766
  • Language : En, Es, Fr & De
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This work collects the contributions presented at the INdAM Workshop “Mathematical modeling and Analysis of degradation and restoration in Cultural Heritage – MACH2019” held in Rome in March 2019. The book is focused on mathematical modeling and simulation techniques with the aim of improving the current strategies of conservation and restoration in cultural heritage, sharing different experiences and approaches. The main topics are: corrosion and sulphation of materials, damage and fractures, stress in thermomechanical systems, contact and adhesion problems, phase transitions and reaction-diffusion models, restoration techniques, additive manufacturing. The final goal is to build a permanent bridge between the experts in cultural heritage and the mathematical community. The work is addressed to experts in cultural heritage and to mathematicians.

Recent Advances in Mechanical Engineering

Recent Advances in Mechanical Engineering
Select Proceedings of ITME 2019

by Mohammad Muzammil

  • Publisher : Springer Nature
  • Release : 2021
  • Pages : 329
  • ISBN : 9811587043
  • Language : En, Es, Fr & De
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Advances in Applied Mechanical Engineering

Advances in Applied Mechanical Engineering
Select Proceedings of ICAMER 2019

by Hari Kumar Voruganti,K. Kiran Kumar,P. Vamsi Krishna,Xiaoliang Jin

  • Publisher : Springer Nature
  • Release : 2020-02-01
  • Pages : 1205
  • ISBN : 9811512019
  • Language : En, Es, Fr & De
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This book presents select peer reviewed proceedings of the International Conference on Applied Mechanical Engineering Research (ICAMER 2019). The books examines various areas of mechanical engineering namely design, thermal, materials, manufacturing and industrial engineering covering topics like FEA, optimization, vibrations, condition monitoring, tribology, CFD, IC engines, turbo-machines, automobiles, manufacturing processes, machining, CAM, additive manufacturing, modelling and simulation of manufacturing processing, optimization of manufacturing processing, supply chain management, and operations management. In addition, recent studies on composite materials, materials characterization, fracture and fatigue, advanced materials, energy storage, green building, phase change materials and structural change monitoring are also covered. Given the contents, this book will be useful for students, researchers and professionals working in mechanical engineering and allied fields.

Mechanics of Additive and Advanced Manufacturing, Volume 8

Mechanics of Additive and Advanced Manufacturing, Volume 8
Proceedings of the 2018 Annual Conference on Experimental and Applied Mechanics

by Sharlotte Kramer,Jennifer L. Jordan,Helena Jin,Jay Carroll,Alison M. Beese

  • Publisher : Springer
  • Release : 2018-09-06
  • Pages : 98
  • ISBN : 3319950835
  • Language : En, Es, Fr & De
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Mechanics of Additive and Advanced Manufacturing, Volume 8 of the Proceedings of the 2018 SEM Annual Conference & Exposition on Experimental and Applied Mechanics, the eighth volume of eight from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies, including: Fatigue & Fracture in AM Materials Additively Manufactured Metals & Structures AM Process Characterization Processing & Mechanical Behavior of AM Materials Dynamic Response of AM Materials Additively Manufactured Polymers & Composites

3D Printing and Additive Manufacturing Technologies

3D Printing and Additive Manufacturing Technologies
A Book

by L. Jyothish Kumar,Pulak M. Pandey,David Ian Wimpenny

  • Publisher : Springer
  • Release : 2018-08-02
  • Pages : 311
  • ISBN : 9811303053
  • Language : En, Es, Fr & De
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This book presents a selection of papers on advanced technologies for 3D printing and additive manufacturing, and demonstrates how these technologies have changed the face of direct, digital technologies for the rapid production of models, prototypes and patterns. Because of their wide range of applications, 3D printing and additive manufacturing technologies have sparked a powerful new industrial revolution in the field of manufacturing. The evolution of 3D printing and additive manufacturing technologies has changed design, engineering and manufacturing processes across such diverse industries as consumer products, aerospace, medical devices and automotive engineering. This book will help designers, R&D personnel, and practicing engineers grasp the latest developments in the field of 3D Printing and Additive Manufacturing.

Additive Manufacturing of High-performance Metals and Alloys

Additive Manufacturing of High-performance Metals and Alloys
Modeling and Optimization

by Igor Shishkovsky

  • Publisher : BoD – Books on Demand
  • Release : 2018-07-11
  • Pages : 154
  • ISBN : 1789233887
  • Language : En, Es, Fr & De
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Freedoms in material choice based on combinatorial design, different directions of process optimization, and computational tools are a significant advantage of additive manufacturing technology. The combination of additive and information technologies enables rapid prototyping and rapid manufacturing models on the design stage, thereby significantly accelerating the design cycle in mechanical engineering. Modern and high-demand powder bed fusion and directed energy deposition methods allow obtaining functional complex shapes and functionally graded structures. Until now, the experimental parametric analysis remains as the main method during AM optimization. Therefore, an additional goal of this book is to introduce readers to new modeling and material's optimization approaches in the rapidly changing world of additive manufacturing of high-performance metals and alloys.

Advances in Additive Manufacturing, Modeling Systems and 3D Prototyping

Advances in Additive Manufacturing, Modeling Systems and 3D Prototyping
Proceedings of the AHFE 2019 International Conference on Additive Manufacturing, Modeling Systems and 3D Prototyping, July 24-28, 2019, Washington D.C., USA

by Massimo Di Nicolantonio,Emilio Rossi,Thomas Alexander

  • Publisher : Springer
  • Release : 2019-06-04
  • Pages : 671
  • ISBN : 303020216X
  • Language : En, Es, Fr & De
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This book discusses the latest advances in digital modeling systems (DMSs) and additive manufacturing (AM) technologies. It covers applications of networked technologies, ubiquitous computing, new materials and hybrid production systems, discussing how they are changing the processes of conception, modeling and production of products and systems of product. The book emphasizes ergonomic and sustainability issues, as well as timely topics such as DMSs and AM in Industry 4.0, DMSs and AM in developing countries, DMSs and AM in extreme environments, thus highlighting future trends and promising scenarios for further developing those technologies. Based on the AHFE 2019 International Conference on Additive Manufacturing, Modeling Systems and 3D Prototyping, held on July 24-28, 2019, in Washington D.C., USA, the book is intended as source of inspiration for researchers, engineers and stakeholders, and to foster interdisciplinary and international collaborations between them.

Experimental Design for Process Parameter Correlation to Dimensional Inaccuracies in Additive Manufacturing Processes

Experimental Design for Process Parameter Correlation to Dimensional Inaccuracies in Additive Manufacturing Processes
A Book

by David Corbin

  • Publisher : Unknown Publisher
  • Release : 2018
  • Pages : 329
  • ISBN : 9876543210XXX
  • Language : En, Es, Fr & De
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The objective of this work is to develop a comprehensive set of experiments for the investigation of the effects of Directed Energy Deposition (DED) processing parameters on dimensional accuracy. Dimensional accuracy, defined as the quantitative assessment of the agreement between the intended geometry and the final geometry of the deposited part, is understood to be one of the most important aspects of quality of an Additive Manufacturing (AM) process. This outcome is generally defined by the heat input affecting dimensions of the process including the capture efficiency of the injected powder, melt-pool size, and thermal cycling of the deposited part. Experiments were designed to generalize the effects of common DED processing parameters and their interactions on dimensional accuracy measured in situ and post-process. The experimental measurements assisted the development of validated, thermo-mechanical models that determined deformation-causing mechanisms in ways that traditional, measurement strategies fail. These models can act as a predictive tool in the assessment of the dimensional accuracy of subsequent directed energy depositions.