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From Microstructure Investigations to Multiscale Modeling

From Microstructure Investigations to Multiscale Modeling PDF Author: Delphine Brancherie
Publisher: John Wiley & Sons
ISBN: 1786302594
Category : Science
Languages : en
Pages : 304

Book Description
Mechanical behaviors of materials are highly influenced by their architectures and/or microstructures. Hence, progress in material science involves understanding and modeling the link between the microstructure and the material behavior at different scales. This book gathers contributions from eminent researchers in the field of computational and experimental material modeling. It presents advanced experimental techniques to acquire the microstructure features together with dedicated numerical and analytical tools to take into account the randomness of the micro-structure.

From Microstructure Investigations to Multiscale Modeling

From Microstructure Investigations to Multiscale Modeling PDF Author: Delphine Brancherie
Publisher: John Wiley & Sons
ISBN: 1786302594
Category : Science
Languages : en
Pages : 304

Book Description
Mechanical behaviors of materials are highly influenced by their architectures and/or microstructures. Hence, progress in material science involves understanding and modeling the link between the microstructure and the material behavior at different scales. This book gathers contributions from eminent researchers in the field of computational and experimental material modeling. It presents advanced experimental techniques to acquire the microstructure features together with dedicated numerical and analytical tools to take into account the randomness of the micro-structure.

Multiscale Modeling of Heterogenous Materials

Multiscale Modeling of Heterogenous Materials PDF Author: Oana Cazacu
Publisher: John Wiley & Sons
ISBN: 1118623509
Category : Technology & Engineering
Languages : en
Pages : 275

Book Description
A material's various proprieties is based on its microscopic and nanoscale structures. This book provides an overview of recent advances in computational methods for linking phenomena in systems that span large ranges of time and spatial scales. Particular attention is given to predicting macroscopic properties based on subscale behaviors. Given the book’s extensive coverage of multi-scale methods for modeling both metallic and geologic materials, it will be an invaluable reading for graduate students, scientists, and practitioners alike.

Nuclear Fusion Programme: Annual Report of the Association Karlsruhe Institute of Technology/EURATOM ; January 2013 - December 2013

Nuclear Fusion Programme: Annual Report of the Association Karlsruhe Institute of Technology/EURATOM ; January 2013 - December 2013 PDF Author: Pleli, Ingrid
Publisher: KIT Scientific Publishing
ISBN:
Category :
Languages : en
Pages : 44

Book Description


Mesoscale Models

Mesoscale Models PDF Author: Sinisa Mesarovic
Publisher: Springer
ISBN: 3319941860
Category : Science
Languages : en
Pages : 344

Book Description
The book helps to answer the following questions: How far have the understanding and mesoscale modeling advanced in recent decades, what are the key open questions that require further research and what are the mathematical and physical requirements for a mesoscale model intended to provide either insight or a predictive engineering tool? It is addressed to young researchers including doctoral students, postdocs and early career faculty,

Additive Manufacturing of High-performance Metals and Alloys

Additive Manufacturing of High-performance Metals and Alloys PDF Author: Igor Shishkovsky
Publisher: BoD – Books on Demand
ISBN: 1789233887
Category : Technology & Engineering
Languages : en
Pages : 156

Book Description
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.

Materials with Internal Structure

Materials with Internal Structure PDF Author: Patrizia Trovalusci
Publisher: Springer
ISBN: 3319214942
Category : Science
Languages : en
Pages : 135

Book Description
The book presents a series of concise papers by researchers specialized in various fields of continuum and computational mechanics and of material science. The focus is on principles and strategies for multiscale modeling and simulation of complex heterogeneous materials, with periodic or random microstructure, subjected to various types of mechanical, thermal, chemical loadings and environmental effects. A wide overview of complex behavior of materials (plasticity, damage, fracture, growth, etc.) is provided. Among various approaches, attention is given to advanced non-classical continua modeling which, provided by constitutive characterization for the internal and external actions (in particular boundary conditions), is a very powerful frame for the gross mechanical description of complex material behaviors, able to circumvent the restrictions of classical coarse–graining multiscale approaches.

Mathematical Applications in Continuum and Structural Mechanics

Mathematical Applications in Continuum and Structural Mechanics PDF Author: Francesco Marmo
Publisher: Springer Nature
ISBN: 3030427072
Category : Technology & Engineering
Languages : en
Pages : 275

Book Description
This book presents a range of research projects focusing on innovative numerical and modeling strategies for the nonlinear analysis of structures and metamaterials. The topics covered concern various analysis approaches based on classical finite element solutions, structural optimization, and analytical solutions in order to present a comprehensive overview of the latest scientific advances. Although based on pioneering research, the contributions are focused on immediate and direct application in practice, providing valuable tools for researchers and practicing professionals alike.

Advanced Micro-Level Experimental Techniques for Food Drying and Processing Applications

Advanced Micro-Level Experimental Techniques for Food Drying and Processing Applications PDF Author: Azharul Karim
Publisher: CRC Press
ISBN: 1000482251
Category : Technology & Engineering
Languages : en
Pages : 108

Book Description
Although strides have been made to quantitatively explore micro-level structural changes during food processing using advanced technologies, there is currently no comprehensive book that details these developments. Therefore, the research community and related industries are not fully aware of the available techniques. Advanced Micro-Level Experimental Techniques for Food Drying and Processing Applications fills this gap. The book has been written based on the authors’ comprehensive knowledge and application of microimaging methods in the thermal processing of food. Features Describes the latest micro-level experimental methods primarily using microimaging techniques Presents detailed procedures of applying these techniques in food processing Highlights the current challenges of developing efficient and novel food processing systems Describes the fundamentals of water transport processes and associated morphological changes during thermal processing of food materials This book is written for researchers, chemical, food, and industrial engineers and advanced students seeking to solve problems of industrial food processing.

Multiscale Modeling of Metal Additive Manufacturing: Investigation Into Dendritic Solidification, Meltpool Dynamics, and Microstructure Evolution

Multiscale Modeling of Metal Additive Manufacturing: Investigation Into Dendritic Solidification, Meltpool Dynamics, and Microstructure Evolution PDF Author: Kunal Pratap Bhagat
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

Book Description
Microstructure evolution in metal additive manufacturing (AM) is a complex multi-physics and multi-scale problem. Understanding the impact of AM process conditions on the microstructure evolution and the resulting mechanical properties of the printed part is an active area of research. The investigation into understanding the microstructure evolution under AM conditions, at different length scales, is done as a three-part research program that is presented in this thesis. In the first part, a high-fidelity numerical method at the mesoscale to model varied dendritic solidification morphologies is developed. A numerical framework encompassing the modeling of Stefan problem formulations relevant to dendritic evolution using a phase-field approach and a finite element method implementation is presented. Using this framework, numerous complex dendritic morphologies that are physically relevant to the solidification of pure melts and binary alloys are modeled. To the best of our knowledge, this is a first-of-its-kind study of numerical convergence of the phase-field equations of dendritic growth in a finite element method setting. Further, using this numerical framework, various types of physically relevant dendritic solidification patterns like single equiaxed, multi-equiaxed, single-columnar, and multi-columnar dendrites are modeled in two-dimensional and three-dimensional computational domains. In the second part, the complex dynamics of meltpool formation during metal additive manufacturing are modeled using a thermo-fluidic numerical model. Statistical-based method of least-squares is exploited to characterize the role of dimensional numbers in the microstructure evolution process. A novel strategy using dimensional analysis and the method of linear least-squares regression to numerically investigate the thermo-fluidic governing equations of the Laser Powder Bed Fusion AM process is presented. First, the governing equations are solved using the finite element method, and the model predictions are validated with experimental and numerical results from the literature. Then, through dimensional analysis, an important dimensionless quantity - interpreted as a measure of heat absorbed by the powdered material and the meltpool, is identified. Key contributions of this work include the demonstration of the correlation between the dimensionless measure of heat absorbed, and classical dimensionless quantities such as Peclet, Marangoni, and Stefan numbers, with advective transport in the meltpool for different alloys, meltpool morphologies, and microstructure evolution-related variables In the third part, the influence on the morphology of evolving dendritic microstructure due to the rapid thermal cycle and fluid convection in the meltpool during metal additive manufacturing is investigated. A finite-element formulation that solves a coupled Navier-Stokes flow model and a phase-field model of dendritic solidification is developed. Microstructure evolution modeled using purely heat and mass diffusion process may not capture the entire spectrum of the dendrite morphology observed in metal additive manufacturing. The impact of flow dynamics on the thermal gradients and momentum transfer that modulate dendritic shapes, along with the associated remelting are modeled using a coupled phase-field model of solidification. Further, the morphological changes to dendrites in the solidifying region beneath the meltpool fusion line are modeled by accounting for convective effects in the mass and heat diffusion process in equiaxed, aligned equiaxed, and columnar dendrite growth for a pure metal and binary alloys. It is observed that for a meltpool formed under high laser power and scan speed conditions, where Marangoni convection is significant, enhanced growth of the secondary arms of columnar dendrite occurs as compared to dendrite growth observed in low convection regions of the meltpool.

Multiscale Phenomena in Materials - Experiments and Modeling Related to Mechanical Behavior: Volume 779

Multiscale Phenomena in Materials - Experiments and Modeling Related to Mechanical Behavior: Volume 779 PDF Author: Hussein M. Zbib
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 320

Book Description
The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners. This 2003 volume focuses on experimentally validated multiscale modeling of ductile metals and alloys.