水文地质工程地质2013，Vol.40Issue(5)：45-50,57,7.
考虑损伤阈值影响的岩石脆-延性转化统计损伤本构模型研究
A study of the statistical damage constitutive model for the brittle-ductile transition of rock with consideration of damage threshold
摘要
Abstract
Common rocks exhibit the characteristics of brittle-ductile transition under triaxial compression with increasing confining pressure.The compression deformation mechanism and characteristics of rock and the deficiency of Lemaitre's strain equivalent theory are discussed,and a damage model according to actual conditions is established by adopting energy theory.Beginning with the objective fact that the rock will not damage when it bears little,the method for measuring microcosmic element strength of rock and the statistical damage evolvement model are established with consideration of the damage threshold.A statistical damage constitutive model is also established based on the above models.It reflects the property of brittle-ductile transition of rock under triaxial compression.The method to determine the model parameters is proposed.The comparison between experimental results and theoretical analyses shows that the model is reasonable and feasible.关键词
岩土工程/脆—延性转化/统计损伤理论/本构模型/损伤阈值Key words
geotechnical engineering/ brittle-ductile transition / statistical damage theory / constitutive model /damage threshold分类
建筑与水利引用本文复制引用
张超,曹文贵,王江营..考虑损伤阈值影响的岩石脆-延性转化统计损伤本构模型研究[J].水文地质工程地质,2013,40(5):45-50,57,7.基金项目
国家自然科学基金(51078137) （51078137）
