Tracking and Motion Analysis of Crack Propagations in Crystals for Molecular Dynamics.

Tsap, L. V. ; Duchaineau, M. ; Goldgof, D. B.

Technical Information Center Oak Ridge Tennessee

关键词: Molecular dynamics;    Crack propagation;    Crystals;    Deformation;    Dislocations;   

RP-ID  :  DE200415006267

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

This paper presents a quantitative analysis for a discovery in molecular dynamics. Recent simulations have shown that velocities of crack propagations in crystals under certain conditions can become supersonic, which is contrary to classical physics. In this research, we present a framework for tracking and motion analysis of crack propagations in crystals. It includes line segment extraction based on Canny edge maps, feature selection based on physical properties and subsequent tracking of primary and secondary wavefronts. This tracking is completely automated; it runs in real time on three 834-image sequences using forty 250 MHZ processors. Results supporting physical observations are presented in terms of both feature tracking and velocity analysis.