不同成因结构面循环剪切试验研究

Experimental Study of Different Structural Planes with Different Mechanical Causes under Cyclic Shear Loading

为研究不同力学成因的结构面在循环剪切荷载作用下的强度、变形和三维形貌演化差异,用倒模法复制劈裂结构面和剪切结构面相似材料试件,进行不同法向应力下循环剪切试验和三维扫描。结果表明:力学成因的差异导致结构面具有不同的表面形貌,不同类型结构面在循环剪切中的破坏模式存在差异,导致两种类型结构面在不同法向应力下循环剪切中的剪应力和法向位移演化规律不同。

To study the strength,deformation and three-dimensional morphology evolution of structural planes with different mechanical causes under cyclic shear loading,similar material specimens of the splitting and shearing structural planes were duplicated by inverted mode method.Cyclic shear tests and three dimensional scanning under different normal stresses were carried out.The results showed that the difference of mechanical causes led to different surface appearances of the structural planes,and the failure modes of the different types of structural planes in the cyclic shear process existed difference,which led to the diversities in evolution laws of the shear stress and the normal displacement of the two types of structural planes in the cyclic shear process under different normal stresses.