1-20 of 111 Search Results for

topological model

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005459
EISBN: 978-1-62708-196-2
... methodologies. These include JMAK (Avrami) models, topological models, and mesoscale physics-based models. microstructure evolution thermomechanical processing nickel-base superalloys avrami model topological model mesoscale physics-based model THE MODELING OF MICROSTRUCTURE EVOLUTION during...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005422
EISBN: 978-1-62708-196-2
... of the microstructure, formulation of the equation of motion, and implementation of the topological transformations. The article presents examples that illustrate the simulation of physical phenomena to demonstrate the predictive power and flexibility of network models. vertex models grain growth grain-boundary...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006314
EISBN: 978-1-62708-179-5
... include the dendrite growth models and the cooperative eutectic growth models. The article provides some solutions using numerical models to simulate the kinetics of microstructure formation in cast iron. It concludes with a discussion on cellular automaton (CA) technique that can handle complex topology...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006555
EISBN: 978-1-62708-290-7
... predictably loaded parts are analyzed using solid modeling/stress analysis software. This ensures that most or all elements of the part carry loads with an objective of reducing material to a minimum. Topology-optimized parts often have a biomimetic look that can be difficult or impossible to manufacture...
Image
Published: 01 November 2010
Fig. 3 Direct modeling of solidification dendritic structure is characterized by full access to the topology of the phases. This is possible by using a representative elementary volume smaller than the interface thickness ( Fig. 2 ). As a result of simulation, the detailed distributions More
Image
Published: 01 November 2010
for nucleation and growth permits topological description of the development of the grain envelope. The latter is thus made of an assembly of interconnected CA cells in a mushy state. Advantages with respect to indirect modeling are direct access to the grain structure, a numerically computed composition field More
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002446
EISBN: 978-1-62708-194-8
... background on how these algorithms make decisions when searching for the optimal design. It also provides information on structural optimization, topology optimization, materials processing optimization, multidisciplinary optimization, and global optimization. design optimization global optimization...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005511
EISBN: 978-1-62708-197-9
... of diffusionally and elastically interacting precipitates and to account self-consistency for topological changes, such as particle coalescence. While quantitative modeling at real length and time scales requires that the fundamental model inputs be linked to multicomponent thermodynamic and mobility databases...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005428
EISBN: 978-1-62708-196-2
... behavior of an average boundary. Explicitly including the topology of the boundary network into models is important because the misorientation of a boundary of a growing grain is defined not only by its crystallography but also by the crystallography of the grain into which it is growing. This article...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001762
EISBN: 978-1-62708-178-8
... must include all atoms in the crystal located within the distance range of interest from the asymmetric unit. For a model of finite dimensions, sums over i and j include all atoms of the model. If the finite model is spherical, the RDF that this type of bonding topology would produce...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002441
EISBN: 978-1-62708-194-8
... majority of cases) to allow the computer to determine what is inside and what is outside of the part being designed or to compute mass and other complex properties. Even a completely closed surface model lacks the topological information needed to automatically perform these types of computations. Figure...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005521
EISBN: 978-1-62708-197-9
... ) and applied to ingot solidification ( Ref 11 , Ref 12 , Ref 13 , Ref 14 , Ref 15 ). This second approach is referred to as indirect modeling of the grain structure. The goal is to predict the average grain size and volume fraction of the phases, while the solid phase is not topologically described ( Fig...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005432
EISBN: 978-1-62708-196-2
... curvature-driven boundary migration (grain growth) and thereby to incorporate several grain topology models in the one simulation, unlike hybrid models ( Ref 41 ) that combine Monte Carlo and CA approaches. Thus, CA algorithms are relatively well developed, and with the introduction of scalable CA ( Ref...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005433
EISBN: 978-1-62708-196-2
... the total specimen elongation that is the hallmark of superplasticity). Strain rates expected of diffusional creep models are less than what is observed in superplastic deformation. Diffusional creep models do not involve grain rotations that are topologically observed in superplasticity. Ashby...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005233
EISBN: 978-1-62708-187-0
... systems geometry arbitrary Lagrangian-Euler equation SIMULATION OF CASTING is motivated by the need to minimize casting defects by understanding and controlling the fluid flow and thermal processes throughout the casting process. However, modeling of casting processes is difficult because...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005402
EISBN: 978-1-62708-196-2
..., this model is unable to describe the correct topological features of the copper-gold phase diagrams, demonstrated as early as 1938 by Shockley ( Ref 24 ). Even with this shortcoming, tremendous advancement of the Calphad approach in phase diagram calculation has been made. In addition to this model...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005504
EISBN: 978-1-62708-197-9
... simulations of microstructural evolution during materials processing and materials response. It also explains how the 3-D experimental data are actually input and used in the simulations using phase-field modeling and finite-element modeling. finite element method focused ion beam tomography...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001482
EISBN: 978-1-62708-173-3
... PROCESSES involve all four phase changes: solid-solid state, solid-liquid, liquid-vapor, and vapor-plasma. Attempts to model the associated heat transport and related phenomena have been ongoing for more than half a century. The temperature history and the peak temperature determine the nature and extent...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... ( Ref 35 ). Topological optimization is another benefit unique to the metal AM processes. This design approach uses both solid modeling and stress-analysis software to analyze a predictably loaded part. This ensures that most or all fabricated sections of the part carry loads, with the objective...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006117
EISBN: 978-1-62708-175-7
... mechanisms analyzed Nicholls and Mullins ( Ref 19 ); Bross and Exner ( Ref 20 ); Svoboda and Riedel ( Ref 21 ); Zhang and Schneibel ( Ref 22 ) Topological models Analysis of morphological changes. Predictions of kinetics limited. More appropriate to microstructural evolution Rhines and DeHoff ( Ref 23...