Influence of mesoscopic heterogeneity on macroscopic behaviour of rock failure of large-scale samples
by Xiao Jing Feng; Dong Duan; Li Bin Liu
International Journal of Materials and Product Technology (IJMPT), Vol. 45, No. 1/2/3/4, 2012

Abstract: Using RFPA soft code, influence of mesoscopic heterogeneity and randomness on behaviour of rock failure of large-scale samples is analysed. Results show that the failure of big-scale samples is manifested as brittle failure, even if the coefficient of homogeneity is 1, the curve after peak load has no gentle evidence, it is obviously different to the research results of smallscale samples. The comparative study when the coefficient of homogeneity m is respectively 1 and 5 shows that, when the coefficient of homogeneity is low, many cracks extending simultaneous and connecting mutually and finally a macroscopic transfixion crack is formed. When the coefficient of homogeneity is high, it extends according to single crack. The localisation phenomenon of failure is even obvious in large-scale samples with the increasing of coefficient of homogeneity, the stress stacking which formed in the cracks extending can easily cause sufficient failure in local area. With the increasing of sample size, the mechanical behaviour effect which caused by randomness can been decreased.

Online publication date: Thu, 18-Sep-2014

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Materials and Product Technology (IJMPT):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com