岩土工程学报2017，Vol.39Issue(6)：978-985,8.DOI:10.11779/CJGE201706002
岩石三维弹塑性损伤本构模型研究
Three-dimension elastic-plastic damage constitutive model for intact rock
摘要
Abstract
Based on the concept of true stress and the strain equivalence hypothesis,a three-dimension elastic-plastic damage constitutive model for rock is established.Combining the nonlinear unified strength model as the yield function and the equivalent plastic shear strain as the hardening parameter considering the effect of stress level,the formulation of elastic-plastic behavior of rock is deduced in the true stress space.As in the normal stress space,the damage evaluation law is given by considering the effect of confining pressure.The present theoretical results and the test data are compared.It is indicated that the proposed constitutive model describes the strength and deformation behaviors and the strain softening behaviors of rock.Furthermore,the model can be employed to simulate rock engineering structures under multi-dimensional nonlinear stress,providing a basic reference for structural design and analysis.关键词
岩石材料/本构模型/非线性统一强度模型/弹塑性/损伤力学Key words
intact rock/constitutive model/nonlinear unified strength model/elastic-plastic behavior/mechanical damage分类
建筑与水利引用本文复制引用
杜修力,黄景琦,金浏,赵密..岩石三维弹塑性损伤本构模型研究[J].岩土工程学报,2017,39(6):978-985,8.基金项目
国家重点基础研究发展计划(“973”计划)项目(2015CB057902) （“973”计划）
国家自然科学基金创新研究群体项目(51421005) （51421005）
