The trajectory primal sketch: a multi-scale scheme for representing motion characteristics

2003 ◽  
Author(s):  
K. Gould ◽  
M. Shah
Keyword(s):  
Primal Sketch ◽  
Multi Scale ◽  
Motion Characteristics ◽  
Scale Scheme

scholarly journals Echoic log-surprise: A multi-scale scheme for acoustic saliency detection

2018 ◽  
Vol 114 ◽  
pp. 255-266 ◽  
Author(s):  
Antonio Rodríguez-Hidalgo ◽  
Carmen Peláez-Moreno ◽  
Ascensión Gallardo-Antolín
Keyword(s):  
Saliency Detection ◽  
Multi Scale ◽  
Scale Scheme

A Multi-Scale Scheme for Modelling Fracture under Dynamic Loading Conditions

2014 ◽  
Vol 627 ◽  
pp. 37-40
Author(s):  
A. Karamnejad ◽  
L.J. Sluys
Keyword(s):  
Dynamic Loading ◽  
Static Problem ◽  
Global Scale ◽  
Local Scale ◽  
Material Point ◽  
Computational Homogenization ◽  
Scale Model ◽  
Multi Scale ◽  
Damaged Zone ◽  
Scale Scheme

Fracture in heterogeneous materials under dynamic loading is modelled using a multi-scale method. Computational homogenization is considered, in which the overall properties at the global-scale are obtained by solving a boundary value problem for a representative volume element (RVE) assigned to each material point of the global-scale model. In order to overcome the problems with upscaling of localized deformations, a non-standard failure zone averaging scheme is used. Discontinuous cohesive macro-cracking is modelled using the XFEM and a gradient-enhanced damage model is used to model diffuse damage at the local-scale. A continuous-discontinuous computational homogenization method is employed to obtain the traction-separation law for macro-cracks using averaged properties calculated over the damaged zone in the RVE. In the multi-scale model, a dynamic analysis is performed for the global-scale model and the local-scale model is solved as a quasi-static problem. Dispersion effects are then captured by accounting for the inertia forces at the local-scale model via a so-called dispersion tensor which depends on the heterogeneity of the RVE. Numerical examples are presented and the multi-scale model results are compared to direct numerical simulation results. Objectivity of the multi-scale scheme with respect to the RVE size is examined.

scholarly journals Finite element modelling of air cavities effect on GnP/epoxy nanocomposite thermal response and its full-field validation

2018 ◽  
Vol 188 ◽  
pp. 01014
Author(s):  
Asimina Manta ◽  
Matthieu Gresil ◽  
Constantinos Soutis
Keyword(s):  
Finite Element ◽  
Thermal Response ◽  
Field Validation ◽  
Element Analysis ◽  
Full Field ◽  
Multi Scale ◽  
Proposed Model ◽  
Air Cavities ◽  
Induced Defects ◽  
Scale Scheme

The manufacturing process of GnP/polymer nanocomposites exhibits important challenges regarding the material quality and how to reduce or eliminate fabrication induced defects. In this work, the effect of air cavities (voids) on the thermal response of nanocomposites is studied by means of finite element analysis on a multi-scale scheme. The proposed model is validated with experimental data by performing generic and full-field comparisons.

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