scholarly journals A KMC-Based Multi-Scale Evolution Simulation Method of Dust in Virtual Campus

2017 ◽  
Vol 28 (2) ◽  
pp. 165-182 ◽  
Author(s):  
Bin Sun ◽  
You-Lin Xu ◽  
Qing Zhu ◽  
Zhaoxia Li

Fatigue damage is one of the leading causes for structural failure of long-span steel bridges, but fatigue damage evolution of a long-span steel bridge is very complex. This study proposes a concurrent multi-scale fatigue damage evolution simulation method for long-span steel bridges from micro short crack nucleation and growth to macro structural component damage until mega structural failure. As a case study, the fatigue damage evolution of the Stonecutters Bridge in Hong Kong under cyclic vehicle loading is finally simulated using the proposed method. It shows that the proposed method is computationally feasible even for such a large scale structure. The method can provide a clear picture how micro short cracks grow into macro fatigue damage of structural components and eventually lead to mega structural failure.


2017 ◽  
Vol 2017 (0) ◽  
pp. 212
Author(s):  
Hitoshi NAGASAWA ◽  
Hironori HlBlNO ◽  
Humihito KIMURA ◽  
Motonobu HASHIMOTO ◽  
Norihumi KASE

2006 ◽  
Vol 527-529 ◽  
pp. 315-318 ◽  
Author(s):  
Alexander A. Schmidt ◽  
Yuri V. Trushin ◽  
K.L. Safonov ◽  
V.S. Kharlamov ◽  
Dmitri V. Kulikov ◽  
...  

The main obstacle for the implementation of numerical simulation for the prediction of the epitaxial growth is the variety of physical processes with considerable differences in time and spatial scales taking place during epitaxy: deposition of atoms, surface and bulk diffusion, nucleation of two-dimensional and three-dimensional clusters, etc. Thus, it is not possible to describe all of them in the framework of a single physical model. In this work there was developed a multi-scale simulation method for molecular beam epitaxy (MBE) of silicon carbide nanostructures on silicon. Three numerical methods were used in a complex: Molecular Dynamics (MD), kinetic Monte Carlo (KMC), and the Rate Equations (RE). MD was used for the estimation of kinetic parameters of atoms at the surface, which are input parameters for other simulation methods. The KMC allowed the atomic-scale simulation of the cluster formation, which is the initial stage of the SiC growth, while the RE method gave the ability to study the growth process on a longer time scale. As a result, a full-scale description of the surface evolution during SiC formation on Si substrates was developed.


2022 ◽  
Vol 29 (1) ◽  
pp. 012901
Author(s):  
T. K. M. Nakamura ◽  
K. A. Blasl ◽  
H. Hasegawa ◽  
T. Umeda ◽  
Y.-H. Liu ◽  
...  
Keyword(s):  

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2771
Author(s):  
Jisong Zhu ◽  
Zhaoxia Jing ◽  
Tianyao Ji ◽  
Nauman Ali Larik

An integrated energy system, referred to specifically as a heterogeneous energy system that combines cooling, heating, power, etc., is a dynamic system containing continuous as well as discrete behaviors on both technical and economic levels. Currently, the comprehensive utilization of multiple forms of energy and the implementation of the energy market have made the simulation of such a system very complicated, which is reflected in two aspects. First, the simulation model becomes complex and varied. Second, the time-varying characteristics of the models are quite diverse. Therefore, a standard and normative modeling and simulation method is urgently needed. This work aims to obtain a compatible modeling and simulation method for the energy economy coupling system. The individual-based model is widely used to describe organisms in an ecology system that are similar to the energy–economy coupled system. Inspired by this, a general simulation approach based on the individual-based model is proposed in this paper to overcome these existing problems. The standard formal expression model is built, then its structure and elements explained in detail, and multi-scale time simulation supported to model and simulate an integrated energy system that is coupled with markets. In addition, a simulator is designed and implemented based on multi-agent framework and model-view-controller architecture. Finally, a simulation case of a conceived scenario was designed and executed, and the results analysis proved the validity and versatility of the proposed approach. The proposed method has the advantages of model standardization, multi-scale time compatibility, distributed simulation capability, and privacy protection. These advantages support and strengthen each other. Through these studies, a systematic approach was formed that could improve the standardization of modeling and simulation in the energy–economy research area.


2020 ◽  
Vol 46 ◽  
pp. 101204
Author(s):  
R. Moreno-Llorca ◽  
A.S. Vaz ◽  
J. Herrero ◽  
A. Millares ◽  
F.J. Bonet-García ◽  
...  

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