塑性材料拉伸时加载速率对屈服强度影响的分析研究  

Analysis and Research on the Influence of Loading Rate on Yield Strength in Plastic Materials Stretching

作　　者：董继蕾 李亮 张宏学 卢小雨 Dong Jilei;Li Liang;Zhang Hong;Xue Lu;Xiao Yu(College of Mechanics and Optoelectronics Physics,Anhui University of Science and Technology,Anhui,Huainan 232001)

机构地区：[1]安徽理工大学力学与光电物理学院,安徽淮南232001

出　　处：《绥化学院学报》2024年第5期146-149,共4页Journal of Suihua University

基　　金：国家自然科学基金“基于湿-热-弹本构和刚柔耦合理论的变桨旋转风力机叶片动力学特性研究”(119002002);2021年度安徽省高等学校省级质量工程项目(2021xxkc033);省级研究生线下示范课程:弹塑性力学(2022xxsfkc023)。

摘　　要：通过对塑性材料在常温下进行不同加载速率的拉伸试验,分析加载速率与材料屈服强度之间的关系,并通过最小二乘法拟合、指数函数拟合、对数函数拟合、幂函数拟合和拉格朗日插值拟合进行加载速率与材料屈服强度之间的曲线拟合。曲线拟合结果表明:屈服强度关于加载速率增加而增大,屈服强度从最小值283.67KPa,增大至303Kpa,增大值所占比例为6.38%~6.81%;六阶曲线拟合图最能反映屈服强度与加载速率的关系。By conducting tensile tests on plastic materials at different loading rates at room temperature,the relationship between loading rate and material yield strength is analyzed.Curve fitting is performed using the least squares method,exponential function fiing,logarithmic function fitting,power function ftting,and Lagrange interpolation fitting to determine the relationship between loading rate and material yield strength.The results of curve fiting show that the yield strength increases with the increase in loading rate.The yield strength increases from a minimum value of 283.67 KPa to 303 KPa,with the increase accounting for 6.38%to 6.81%of the overall yield strength.The sixth-order curve fitting graph best reflects the relationship between yield strength and loading rate.

关 键 词：塑性材料 静载速率 屈服强度 曲线拟合 

分 类 号：TB302[一般工业技术—材料科学与工程]