少有人走的路.doc

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1、宏观力学macroscopicmechanics,macromechanics细观力学mesomechanics微观力学microscopicmechanics,micromechanics固体力学solidmechanics弹性力学elasticity弹性理论theoryofelasticity各向同性弹性isotropicelasticity各向异性弹性Anisotropicelasticity永久变形permanentdeformation应变软化strain-softening本构方程constitutiveequation名义应力nominalstress真应力t

2、ruestress等效应力equivalentstress对数应变logarithmicstrain应变率strainrate裂纹Crack缺陷Defect微裂纹Microcrack裂纹闭合crackclosure裂纹扩展速率crackgrowthrate稳定裂纹扩展stablecrackgrowth损伤力学damagemechanics损伤Damage连续介质损伤力学continuumdamagemechanics细观损伤力学microscopicdamagemechanics累积损伤accumulateddamage损伤准则damagecriterion损伤演化方程da

3、mageevolutionequation损伤软化damagesoftening损伤强化damagestrengthening损伤阈值damagethreshold损伤变量damagevariable裂纹扩展crackgrowth,crackPropagation裂纹萌生crackinitiation初应变initialstrain初应力initialstress数值模拟numericalsimulation围压confiningpressure孔隙率/孔隙度porosity扩容dilatancy有效应力effectivestress多孔介质porousmedium剪胀效应

4、dilatancyeffect无量纲参数dimensionlessparameter弹性模量modulusofelasticity应力—应变曲线stress-straincurve拉梅常量Lameconstants岩石三轴抗压强度triaxialcompressivestrengthofrock应力-应变全过程曲线completestress-straincurves常规三轴压缩试验conventionaltriaxialcompressiontest建立了参量间的关系therelationshipamongtheyieldstrength，peakstrength，res

5、idualstrengthandtheconfiningpressureareobtained。分析结果表明，模型结果与实验结果符合得比较好。Itisshownthatthesimulationresultsagreewellwithexperimentalresults.Theresultsindicatethatthetheoreticmodelfitswellwiththetest.基于裂纹扩展能量平衡的花岗岩动态本构模型研究STUDYONCONSTITUTIVERELATIONOFROCKUNDERDYNAMICCOMPRESSIONBASEDONENERGYBAL

6、ANCEDURINGCRACKGROWTH摘要应用滑移型裂纹模型，基于裂纹扩展过程中的能量平衡原理，建立了花岗岩材料的动态本构模型，AbstractBasedontheslidingcrackmodelandenergybalanceduringcrackgrowth，thedynamicconstitutiverelationofrockunderdifferentstrainratesisestablished.结果表明Itisindicatedthat另外Inaddition