文献类型：期刊文献

中文题名：用于金属材料单轴本构关系估算的长条形试样小冲杆试验方法研究

英文题名：RESEARCH ON ESTIMATION OF UNIAXIAL CONSTITUTIVE RELATIONSHIP OF METAL MATERIAL BY SMALL PUNCH TEST OF STRIP-TYPE SPECIMEN

作者：刘刚[1];关凯书[1];钟继如[1];王武琳[1]

机构：[1]华东理工大学承压系统安全科学教育部重点实验室,上海200237

年份：2021

卷号：43

期号：4

起止页码：808

中文期刊名：机械强度

外文期刊名：Journal of Mechanical Strength

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：中国博士后科学基金项目(2019M661406)资助。

语种：中文

中文关键词：小冲杆试验;长条形试样;能量等效原理;单轴本构关系

外文关键词：Small punch test;Strip-type specimen;Energy equivalence principle;Uniaxial constitutive relationship

摘要：常规的小冲杆试验技术获取宏观材料的力学性能主要是通过经验关联法。但是经验关联法受小冲杆试验装置和试样尺寸的限制,尚没有一个统一的、公认的经验关联公式。为实现小冲杆试验技术获得材料的半解析解公式,采用新型长条形小冲杆试样,基于能量等效原理并结合有限元计算,提出了关于该试样的Chen-Cai半解析方程的4个系数,进而提出了依据长条形小冲杆试样的载荷-位移曲线估算金属材料的单轴本构关系的新型试验方法。针对Q345R钢和904L不锈钢,新方法的单轴本构关系估算结果与单轴拉伸试验结果较为吻合。
The empirical correlation method of small punch test is the main method to obtain the mechanical properties of macroscopic materials.However,owing to the empirical correlation method is limited by the test device of small punch test and the size of specimen,there is no unified and recognized empirical correlation formula so far.In order to obtain the semi-analytical solution formula by using the small punch test,a new strip-type specimen of small punch test based on the energy equivalence principle and the finite element analysis method were adopted to obtain 4 coefficients of the Chen-Cai semi-analytical equation.A new method of estimating the uniaxial constitutive relationship of metal material by small punch test of strip-type specimen was proposed.The uniaxial constitutive relationship of Q345 R steel and 904 stainless steel estimated by the new method is in good agreement with the true stress-strain curve obtained by uniaxial tensile test.