摘要
利用优化的等离子喷涂工艺参数制备了HA/Zr O2复合涂层,根据均匀设计方法以及二次多项式逐步回归分析,并使用销盘摩擦试验机,建立涂层磨损率关于压力与速度的表达式。利用有限元理论结合磨损率模型的方法,对人工髋关节进行磨损仿真并探讨关节间隙对磨损的影响。通过对磨损率预测模型验证表明,该模型在较大范围内具有较好的预测效果。人工髋关节磨损仿真显示,随着磨损次数的增加,髋臼接触压力逐渐减小,而接触区域不断扩大;涂层的磨损体积近似呈线性增长,而线磨损量的增长速度由快到慢。同时,随着关节间隙的增大,髋臼的磨损体积减小,而最大磨损深度增加。
HA / Zr O2 composite coating was prepared with optimized spraying parameters. Wear rate model of the coating was built with pin-on-disc tester basing on uniform design theory and the quadratic polynomial stepwise regression analysis method. Computational wear modeling based on the finite element method and the wear rate model was developed for artificial hip joint and the effect of joint clearance was investigated. It was proved by the experimental data that the wear rate model had a good forecasting effect within a wide range. The results of the wear simulation of artificial hip joint demonstrated that with the increasing of wear cycle,the contact stress on the contact surface of the joint decreased,while the worn area increased gradually,and the wear volume increased linearly but the growth rate of wear depth changed from fast to slow. What＇s more,with the increasing of joint clearance,the wear volume of the acetabular decreased,but the largest wear depth increased.
出处
《机械强度》
CAS
CSCD
北大核心
2015年第6期1092-1098,共7页
Journal of Mechanical Strength
基金
国家自然科学基金项目(51105339
51275471)资助~~
