河北地质大学学报2025，Vol.48Issue(2)：77-85,9.DOI:10.13937/j.cnki.hbdzdxxb.2025.02.009
考虑压密非线性和残余阶段的岩石损伤本构模型
Rock Damage Constitutive Model Considering Compaction Nonlinearity and Residual Stage
摘要
Abstract
In view of the shortcomings and limitations of the defect growth model in describing the compaction nonlinearity and residual stress stages of rock under uniaxial compression,and the narrow application scope of the model,an improvement is made.According to the change of tangent modulus from compaction stage to elastic stage,a non-linear constitutive model reflecting compaction nonlinearity of rocks is established.According to the energy change of rock during compression process,energy coefficient λ is introduced to replace the damage proportional coefficient of rock to describe the deformation characteristics of rock when it achieves residual stress.The specific physical meaning and calculation method of energy coefficient λ are given to correct the shortcomings of damage variable evolution in the original model.The established model is used to fit the stress-strain curves of several kinds of rocks,and good results are obtained.关键词
压密非线性/损伤本构模型/损伤演化/能耗系数/残余应力Key words
compaction nonlinearity/nonlinear constitutive model/damage evolution/energy coefficient/residual stress分类
经济学引用本文复制引用
李雅婧,连瑾,冯文林..考虑压密非线性和残余阶段的岩石损伤本构模型[J].河北地质大学学报,2025,48(2):77-85,9.基金项目
国家自然科学青年基金项目(51304068) （51304068）
