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Advances in Materials Science and Engineering
Volume 2016 (2016), Article ID 2156936, 13 pages
http://dx.doi.org/10.1155/2016/2156936
Research Article

The Deformation Mechanisms in Process of Crack Propagation for Alpha Titanium with Compounding Microdefects

College of Architecture and Environment, Sichuan University, Chengdu 610065, China

Received 26 February 2016; Revised 22 May 2016; Accepted 23 May 2016

Academic Editor: Hiroshi Noguchi

Copyright © 2016 Ying Sheng and Xiang-guo Zeng. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The multiscale analysis method based on traction-separation law (TSL) and cohesive zone law was used to describe the cross-scale defective process of alpha titanium (α-Ti) material with compounding microdefects in this paper. First, the properties of T-S curve and the reasonable range of T-S area relative to the length of defects were discussed. Next, based on the conclusions above, the molecule dynamics analysis of three models of α-Ti with compounding microdefects was conducted and cross-scaly simulated. The phenomenon, principles, and mechanisms of different compound microscale defects propagation of α-Ti were observed and explained at atomic scale, and the effects of different microdefects on macrofracture parameters of materials were studied.