中文摘要：

光学玻璃磨削过程中磨粒对光学玻璃的冲击作用直接关系到亚表面裂纹的形态和深度.因此光学玻璃磨削磨粒动态冲击作用的研究是光学制造领域重要基础性课题.根据应力张量理论和最大拉应力准则研究了柱面应力波最大拉应力的主方向,得到了磨粒冲击硬脆光学材料亚表面裂纹开裂的方向和裂纹系统的形态.通过光学玻璃单颗粒磨削实验,试件截面抛光、扫描电镜（SEM）检测亚表面裂纹系统的形态,实验结果显示,亚表面裂纹开裂的方向和裂纹系统的形态与理论研究的结果一致.光学玻璃单颗粒磨削磨粒动态冲击实验结果表明,光学玻璃磨削亚表面裂纹是磨粒动态冲击裂纹,磨粒动态冲击裂纹系统由径向裂纹和环向裂纹构成,光学玻璃材料磨削过程中磨粒的冲击作用是亚表面裂纹生成的重要影响因素.

英文摘要：

The impact of abrasive for optical glass is directly related to morphology and dam- age depth of the sub surface crack in the process of grinding optical glass. So the research on the dynamic impact of optical glass grinding is an important basic subject in the field of opti- cal manufacturing. The main direction of maximum tensile stress for cylinder stress wave was studied according to the stress tensor theory and the maximum tensile stress criterion. And the crack direction and crack morphology of sub surface in abrasive impacting optical glass were obtained. The damage morphology of sub surface crack layer was detected by single grain grinding experiment, the specimen angle polishing and scanning electron microscope （SEM） , which showed that the crack direction and crack morphology were consistent with the theoretical research results. The experimental results of single grain grinding optical glass show that grinding of optical glass sub surface crack is abrasive dynamic impact crack. The abrasive dynamic impact crack system consists of ring crack and radial crack. The abrasive impact effect in grinding process of optical glass material is an important factor which affects the deformation of sub surface crack.