【摘要】 本文阐述了激光夹层散斑法的基本原理,并成功地将这一技术,用于花岗岩切削应变场的测定及断裂裂纹的生长过程检测、研究结果表明,岩石切削断裂是由拉应力引起的;断裂裂纹在刀尖上部和刀尖处生成;主裂纹的交错形成了代替前刀面切削的积屑瘤,材料的不均匀性,将影响断裂裂纹的扩展。本研究结果为进一步的岩石切削力预报公式的建立及岩石切削刀具的改进提供了实验依据。更多还原

【Abstract】 The principles of the sandwich laser speckle interferometry method are described in the paper. The sandwich laser speckle method has been successfully used to measure the strain fields, the formation and growth of cracks when the granite is cuts The resulls have shown that the initiat cracks are formed by tensile stress above and on the tip of cutting tool. The interaction of these cracks forms a built-up edge acting-as the tool face. The inhomogeneity of the crack will affect the growth of the cracks. The sandwich laser speckle method is very useful to studying the rock cutting mechanism. These results would be very helpful both for the study of the predicting formula of cutting force and the innovation of cutting tool for the rock.更多还原