文献类型：期刊文献

中文题名：小冲杆试验确定材料拉伸断后伸长率的研究

英文题名：An Assessment of the Elongation of Fractured Specimen Subjected to Tensile Testing Based on Small Punch Testing

作者：关凯书[1];徐彤[2];宋明[1];赵立勋[1];王志文[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;[2]中国特种设备检测研究院,北京100013

年份：2011

卷号：26

期号：2

起止页码：209

中文期刊名：实验力学

外文期刊名：Journal of Experimental Mechanics

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然基金资助(51075148);质检总局公益性项目资助:在役设备材料性能小冲杆试验方法与标准研究(200810405)

语种：中文

中文关键词：小冲杆试验;断后伸长率;拉伸试验

外文关键词：small punch test; elongation after fracture; tensile testing

摘要：小冲杆试验技术可以近似无损地测试材料的力学性能。本文对几十种材料进行了小冲杆试验研究,对小冲杆试样的轴向挠度δ与拉伸断后伸长率A进行了经验关联。研究表明,对于试验中涉及的几十种材料,二者之间没有统一的线性相关公式,但可以按材料的抗拉强度和屈强比将材料分类,然后分别对δ和A进行线性关联。对于抗拉强度小于600MPa的材料,可按屈强比为0.67将材料分为两类,分别构成两个线性经验公式。而对于抗拉强度大于600MPa的材料,尚没有找到明显的规律。
Small Punch Test（SPT） with miniature specimen is a new technique applied to non-destructive evaluation of material mechanical properties.SPT was performed for dozens of materials to investigate the relationship between the axial deflection δ of SPT specimen and the elongation A of the fractured specimen subjected to tensile testing.Experimental results show that there is not a linear relation between δ and A for tested dozens of materials.But according to the ultimate tensile strength and yield-strength ratio,above-mentioned materials can be divided into different groups.Then the axial deflection δ of SPT can be linearly correlated to the A of the fractured specimen subjected to tensile testing in each group respectively.For materials,whose ultimate tensile strength is less than 600MPa,two groups can be devided according to the yield-strength ratio 0.67.A linear empirical correlation formula was proposed for each of group.No obvious correlation was found for materials whose ultimate tensile strength is larger than 600MPa,due to data insufficiency.