Paper Title:
Avalanche Behaviour in Microfracturing Process of 3-D Brittle Disordered Material
  Abstract

Using a newly-developed Material Failure Process Analysis code (MFPA3D), the micro-fracturing process and the avalanche behavior characterization of brittle disordered materials such as rock or concrete is numerically studied under uniaxial compression and tension. It is found that, due to the heterogeneity of the disordered material, there is an avalanche behavior in the microcrack coalescence process. Meanwhile, a hierarchy of avalanche events also numerically observed though a study of numerically obtained acoustic emissions or seismic events. Numerical simulations indicate that macro-crack nucleation starts well before the peak stress is reached and the crack propagation and coalescence can be traced, which can be taken as a precursory to predict the macro-fracture of the brittle disordered materials. In addition, the numerically obtained results also reveal the presence of residual strength in the post-peak region and the resemblance in the stress-strain curves between uniaxial compression and tension.

  Info
Periodical
Key Engineering Materials (Volumes 297-300)
Edited by
Young-Jin Kim, Dong-Ho Bae and Yun-Jae Kim
Pages
2567-2572
DOI
10.4028/www.scientific.net/KEM.297-300.2567
Citation
D. S. Zhao, T. Xu, C. A. Tang, H. Q. Zhang, Z. Z. Liang, "Avalanche Behaviour in Microfracturing Process of 3-D Brittle Disordered Material", Key Engineering Materials, Vols. 297-300, pp. 2567-2572, 2005
Online since
November 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Wei Hong Li, Li Jiu Wang, Chun An Tang, Yi Wang Bao, Xiong Chen, Shuang Xu
Abstract:The aim of this study is to demonstrate the influence of the stress parallel to the crack plane on subcritical crack growth in brittle...
1071
Authors: Wan Cheng Zhu, Jin Chao Duan, Chun An Tang, Shan Yong Wang
Abstract:Rock and concrete are typical heterogeneous material that the meso-scale heterogeneity may have a significant effect on their macro-scale...
315
Authors: Tian Hui Ma, Chun An Tang, Tao Xu, Zheng Zhao Liang
Abstract:Ductile tearing of brittle solid with initial crack is studied numerically. This work is focused on the simulation and analysis of crack...
931
Authors: Li Wang, Da Hu Rui, Jian Hui Yang
Abstract:Multi-scale science is the challenge and opportunity of science in the 21th century, and turbulence of liquid and fracture of solid will be...
2084
Authors: Jun Lian He, Ming Tian Li
Abstract:Crack propagation in quasi-brittle material such as rock and concrete is studied by a new numerical method, lattice cellular automata....
748