D-P准则与岩石断裂韧度K_(Ic),K_(II)c关系的研究

RESEARCH ON RELATION OF D-P FAILURE CRITERION AND ROCK FRACTURE TOUGHNESS K_(Ic),K_(IIc)

通过断裂力学中裂纹端部的应力叠加,得出拉剪裂纹的端部总应力,代入D-P破坏准则,经推导得出D-P准则与岩石断裂韧度KIc,KIIc的相互关系。并以三峡永久船闸高边坡为例,说明该推导的合理性。

Through overlapping the stresses at the end region of a crack,the total stress at the end region of tensile and shearing crack is obtained,which is then introduced into D-P failure criterion.The relation between coefficient of D-P failure criterion and rock fracture toughness KIc,KIIc is deduced.The validity of deduced relation is proved by an example of slope rock masses in Three Gorges Project.