不同弹性模量的Ti6Al4V合金模态及超声疲劳寿命仿真研究  

Modes of Ti6Al4V titanium alloy with different elastic modulus and simulation of their ultrasonic fatigue life

作　　者：程祎 何浩 何哲宇 CHENG Yi;HE Hao;HE Zheyu(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545616,China;School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545616,China)

机构地区：[1]广西科技大学机械与汽车工程学院,广西柳州545616 [2]广西科技大学电子工程学院,广西柳州545616

出　　处：《广西科技大学学报》2024年第2期118-127,共10页Journal of Guangxi University of Science and Technology

基　　金：广西科技基地和人才专项项目(桂科AD21220139)资助。

摘　　要：本文以超声手术刀用Ti6Al4V合金为研究对象,针对其不同弹性模量的超声疲劳性能进行了系统研究。对弹性模量是95、100、105、110 GPa的试样在位移振幅为20~100μm、频率为(20.0±0.5)kHz的条件下进行谐响应分析,并以该数据为基础进行有限元静态结构分析;通过nCode DesignLife分析不同弹性模量的Ti6Al4V合金疲劳损伤云图和疲劳寿命云图,并绘制S-N曲线。结果表明,随着钛合金弹性模量的增加,其超声疲劳性能呈现先降低后增加的趋势,其中弹性模量为105 GPa时超声疲劳性能最低。The ultrasonic fatigue performance of Ti6Al4V alloy for ultrasonic scalpel with different elastic modulus were studied.Harmonic response analysis was carried out on specimens with elastic moduli of 95,100,105 and 110 GPa under the condition of displacement amplitude ranging from 20~100μm and frequency of(20.0±0.5)kHz.Finite element static structural analysis was carried out based on the data.The nCode DesignLife was used to analyze the fatigue damage cloud map and fatigue life cloud map of Ti6Al4V alloy with different elastic modulus,and the S-N curve was drawn.The results show that with the increase of elastic modulus of titanium alloy,its ultrasonic fatigue performance shows a trend of first decreasing and then increasing,among which the ultrasonic fatigue performance is the lowest when the elastic modulus is 105 GPa.

关 键 词：超声疲劳试样 nCode DesignLife 弹性模量 疲劳寿命 

分 类 号：TG146.23[一般工业技术—材料科学与工程]