Browsing by Author "Zhong, Wen"
Now showing 1 - 4 of 4
Results Per Page
Sort Options
- ItemModeling liquid transport in fibrous structures: An multi-scale approach(Technická Univerzita v Liberci, 2006) Zhong, Wen; Pan, Ning; Lukáš, DavidThe Ising model combined with Kawasaki dynamics is applied in modeling liquid transport in fibrous materials. This meso-scale approach is especially useful in the study of materials with characteristic length scale in the range of nano- and micrometers, where conventional continuum mechanics approach is no longer valid. The technique presented in this paper represents an attempt for cross-scale modeling of physical phenomena to bridge the gap between macro behavior of a heterogeneous material system and those of its basic constituent particles. The transition from one scale to another is carried out by the so called "hand-shaking strategy." Copyright © 2006 American Scientific Publishers All rights reserved.
- ItemMulti-scale modeling of liquid transport in fibrous materials(Technická Univerzita v Liberci, 2005) Zhong, Wen; Pan, Ning; Lukáš, DavidIsing's model, combined with Kawasaki dynamics, is applied in modeling liquid transport in fibrous materials. To bridge the gap between the macro behavior of a heterogeneous material system and its basic constituent particles, an attempt at the multi-scale modeling of transport in fibrous materials is presented in this paper. © 2005 Elsevier Ltd.
- ItemA Stochastic Approach on the Tear Behavior of Coated Fabrics with Interphase(American Society of Mechanical Engineers (ASME), 2003) Zhong, Wen; Pan, Ning; Lukáš, DavidA stochastic approach, the Ising model combined with Monte Carlo simulation, is employed to study the process of a tongue tear process of coated fabrics. The complicated mechanisms involved can be realistically simulated with a relatively simple algorithm. The important factors, especially the interphase between the coating and the fabric, influencing the tear behavior, formation and failure of the del-zone can be represented by the corresponding coefficients in an energy expression of the system. The results of parametric studies are in good qualitative agreement with the behavior of real systems, indicating the usefulness of this approach in the studies of similar interfacial phenomena.
- ItemStochastic modelling of tear behaviour of coated fabrics(Technická Univerzita v Liberci, 2004) Zhong, Wen; Pan, Ning; Lukáš, DavidA stochastic approach, using the Ising model combined with the Monte Carlo simulation, is employed to study the phenomenon of tongue tear failure in coated fabrics. The complicated mechanisms involved can be realistically simulated with a relatively simple algorithm. The important factors, especially the effects of the interphase between the coating and the fabric, and the stretched part of the material at the crack front (the del-zone) can be represented by corresponding coefficients in the Hamiltonian expression of the system. The minimization of the system Hamiltonian yields the most likely new steps for crack propagation, while the Monte Carlo method is used to select the one that will actually occur, reflecting the stochastic nature in the behaviour of real systems, indicating the usefulness of this approach in studies of similar interfacial phenomena. However, this model like many others needs to be calibrated based on data from a real system for quantitative and accurate predictions.