Solidification occurs in several material processing methods, such as in casting, welding, and laser additive manufacturing of metals, and it controls the nanoand microstructures and the overall properties. Recent advances in experimental and computational modeling techniques have made it possible to more e ectively study atomistic and microscale mechanisms that control the solidification struc...

the objective of this study was to develop a numerical model for the prediction of temperature distribution, effective plastic strain distribution, and especially material flow in friction stir welding of copper plates. the deform-3d software was used by incorporating a lagrangian incremental formulation. threedimensional results of the material flow pattern which were extracted using the point...

This paper presents an approach of compact thermal modeling — HotSpot, which is parameterized according to design geometrical dimensions and material physical properties. While most existing compact thermal modeling methods facilitate thermal analysis of existing package designs, the HotSpot modeling method is more suitable for the exploration of new designs at both the die level and the packag...

Structures and materials subject to extreme loads often exhibit large deformations and large rotations in 3D. Modeling of such phenomena is very challenging and has conventionally been done using detailed models of the structure or the material-system using continuum and/or structural fi nite elements. Using detailed continuum fi nite element models for large structures can be computationally i...

In this paper, we articulate a novel meshless computational paradigm for the effective modeling, accurate physical simulation, and rapid visualization of solid objects. The uniqueness of our approach is that both the interior and the boundary of our new volumetric representation are point-based, generalizing the powerful and popular method of point-sampled surfaces. We also build the point-base...

Computational heat transfer analysis often involves moving fluxes which induce traveling fronts of phase change coupled to one or more field variables. Examples are the transient simulation of melting, welding or of additive manufacturing processes, where material changes its state and the controlling fields are temperature and structural deformation. One of the challenges for a numerical compu...

prediction of mechanical properties of carbon nanotube-based composite is one of the important issues which should be addressed reasonably. a proper modeling approach is a multi-scale technique starting from nano scale and lasting to macro scale passing in-between scales of micro and meso. the main goal of this research is to develop a multi-scale modeling approach to extract mechanical propert...

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Computational modeling and bilingualism have had until recently only limited interactions (see reviews in French & Jacquet, 2004; Hernandez, Li, & MacWhinney, 2005; Li & Farkas, 2002; Thomas & van Heuven, 2005). Bilingualism has been the norm rather than the exception in our globalized world, but the acquisition of two languages entails significant complexity that challenges empirical methodolo...