尖锐压头刻划脆性材料的断裂机理研究  

Research of Fracture Mechanism of sharping Intentor Sliding brittle Material *

作　　者：董申[1] 赵奕[1] 周明[1] 李兆光[1] 

机构地区：[1]哈尔滨工业大学

出　　处：《航空精密制造技术》1998年第2期25-28,共4页Aviation Precision Manufacturing Technology

基　　金：国家自然科学基金

摘　　要：以金刚石压头对脆性材料的压痕和刻划实验为基础，研究了在弹性半空间下，垂直点载荷和切向点载荷共同作用的应力场中中介裂纹的产生和扩展机理。当有切向载荷作用下，裂纹产生的长度和方向都受到切向载荷影响，并研究了切向载荷当量系数和裂纹生成角两个参数对裂纹影响关系。Based on diamond indentation hardness sliding test,this paper researched the fracture initiation and propagation mechanics of median vent in the elastic half-space stress filed under the normal load and tangible load.The length and direction of the crack has been influenced by the tangible load.At same time,researched the influence of the two parameters—tangible load coefficient and fracture initiation angle to fracture.It is very important to study the fracture initiation of ultraprecision diamord turning and critical turning depth.

关 键 词：中介裂纹 切向载荷当量系数 垂直点载荷 裂纹生成角 临界切深 

分 类 号：TG731[金属学及工艺—刀具与模具] TG731