A Statistical Damage Constitutive Model For Brittle Rocks Based On the Lade-Duncan Failure Criterion

被引：6
|
作者：
Tian, Zhenyuan [1 ]
Wang, Wei [1 ]
Li, Xuehao [1 ]
Xu, Weiya [1 ]
机构：
[1] Hohai Univ, Key Lab Minist Educ Geomech & Embankment Engn, Nanjing, Jiangsu, Peoples R China
来源：
ADVANCED CONSTRUCTION TECHNOLOGIES | 2014年 / 919-921卷
关键词：
rock mechanics; Lade-Duncan failure criterion; damage threshold; statistical damage model;
D O I：
10.4028/www.scientific.net/AMR.919-921.632
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Micro-unit strength of rock is randomly distributed based on Lemaitre's strain equivalence assumptions. The paper presents a method for measuring micro-unit strength taking into account the damage threshold. Assuming that the micro-unit strength obeys the Weibull distribution, combined with the Lade-Duncan failure criterion, a new statistical damage constitutive model for brittle rocks is established and the model parameters m and F-0 are determined. The model can simulate the stress-strain relation of full process of rock failure well, especially reflects the influence of different stress on damage threshold and the linear elastic characteristic under low stress for rock. The good accord verifies the validity and feasibility of the new model.
引用
收藏
页码：632 / 636
页数：5
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