不同接触下镜片亚表面损伤形成数值模拟
Numerical simulation of sub-surface damage of optical lenses under different contact

针对目前光学镜片磨削加工时仿真模拟接触模型过于简化的问题，充分考虑不规则磨粒与光学镜片间存在的点、线、弧三种接触状态，分别建立磨粒与光学镜片粗糙表面间的双微凸体接触模型. 通过实验，获得磨粒与光学镜片的动态接触过程、应力变化趋势和亚表面损伤的形成、扩展等情况，以及相同加工工艺参数下，磨粒与光学镜片间不同接触状态对光学镜片亚表面裂纹深度和材料磨削去除率的影响规律.
In view of the current phenomenon that simulation of contact model during the process of grinding optical lens is too simple，the double micro asperity contact models between grain and the rough surface of optical lens is established with taking that into consideration，there are three different states between the irregular grain and optical lens，namely point contact and line contact and arc contact. And obtained the fact of dynamic contact process，stress change trend and the formation and expansion of surface damage. Meanwhile，simulating the effects of different contact state between grain and optical lens on sub-surface crack depth and the material removal rate under the same processing parameters