摘要
通过力学性能试验对微观参数进行校准,建立了完全烧结牙科氧化锆陶瓷的离散元模型。基于该模型对完全烧结牙科氧化锆陶瓷常规车削加工过程进行了动态仿真,对氧化锆陶瓷车削加工后的微裂纹分布情况进行了模拟,分析了不同切削速度、切削深度对加工后表面裂纹情况及动态切削力的影响。仿真结果表明:加工后表面残留裂纹的数目及其最大深度、动态切削力均随切削深度的增大而明显增大;切削速度对表面残留裂纹的数目、动态切削力影响不明显,对表面残留裂纹最大深度影响没有明显规律。
Discrete element model of fully sintering dental Zirconia was constructed and calibrated.Based on the model,the dynamic process of normal turning and distribution of turning micro-cracks of fully sintering dental Zirconia was simulated,and the effects of different cutting speeds and cutting depths on the formation of surface cracks and dynamic cutting force were also analyzed.Results show that the dynamic cutting force,the surface crack number and maximum depth increases significantly with the increase of the cutting speed and cutting depth,while the influence of cutting speed on the surface crack number and dynamic cutting force is not distinct;there is not distinct regularity about the influence of cutting speed on the maximum depth of surface crack.
出处
《机械设计与制造》
北大核心
2013年第4期78-81,共4页
Machinery Design & Manufacture
基金
国家自然科学基金项目(51075173)
江苏省自然科学基金(BK2010288)
关键词
氧化锆
车削
裂纹
切削力
离散元
仿真
Zirconia
Turning
Crack
Discrete Element
Simulation
