| 小冲杆试验确定材料拉伸断后伸长率的研究 |
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| 引用本文： | 关凯书,徐彤,宋明,赵立勋,王志文.小冲杆试验确定材料拉伸断后伸长率的研究[J].实验力学,2011,26(2):209-215. |
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| 作者姓名： | 关凯书 徐彤 宋明 赵立勋 王志文 |
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| 作者单位： | 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 |
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| 基金项目： | 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) |
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| 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,对小冲杆试样的抽向挠度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,但可以按材料的杭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...
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| 关 键 词： | 小冲杆试验 断后伸长率 拉伸试验 |
An Assessment of the Elongation of Fractured Specimen Subjected to Tensile Testing Based on Small Punch Testing |
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| GUAN Kai-shu,XU Tong,SONG Ming,ZHAO Li-xun and WANG Zhi-wen.An Assessment of the Elongation of Fractured Specimen Subjected to Tensile Testing Based on Small Punch Testing[J].Journal of Experimental Mechanics,2011,26(2):209-215. |
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| Authors: | GUAN Kai-shu XU Tong SONG Ming ZHAO Li-xun and WANG Zhi-wen |
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| Institution: | The Key Laboratory of Safety Science of Pressurized System, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;China Special Equipment Inspection& Research Institute, Beijing 100013, China;The Key Laboratory of Safety Science of Pressurized System, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;The Key Laboratory of Safety Science of Pressurized System, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;The Key Laboratory of Safety Science of Pressurized System, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: | 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. |
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| Keywords: | small punch test elongation after fracture tensile testing |
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