文献类型：期刊文献

中文题名：带环形裂纹的微试样小冲杆试验法测试材料断裂韧性探讨

英文题名：Determination of material fracture toughness by circular pre-cracked small punch test specimens

作者：关凯书[1];徐一飞[1];喻灿[1];陈吉[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：2012

卷号：19

期号：6

起止页码：103

中文期刊名：塑性工程学报

外文期刊名：Journal of Plasticity Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD_E2011_2012】；

基金：国家自然科学基金资助项目(51075148);质检总局公益性资助项目(201110029);国家科技攻关资助项目(2011BAK06B03)

语种：中文

中文关键词：小冲杆试验;环形裂纹;断裂韧性;J积分

外文关键词：small punch test; pre-crack; fracutre toughness; J integral

摘要：火电、核电、石油化工行业中有大量的在役压力容器、管道和构件,准确评价在役设备材料的脆化和结构完整性,对于保证装置的安全运行具有重要意义。为适应这一需求,小冲杆测试技术得到了发展,但对小冲杆试样评估在役容器材料的断裂韧性时,仍然只是依靠经验方法和标准的断裂韧性值进行关联,缺乏理论依据。该文提出了在小冲杆试样上开一环形裂纹,以反映裂纹体的断裂韧性测试要求。
The mechanical properties of pressure vessels and pipes operated at thermal power, nuclear power and petrochemical industry deteriorate drastically during a long period of service. Consequently, there is an increasing need for the development of a procedure for assessing structure integrity and remain life of these parts. Small punch test （SPT）, a new miniature specimen test technique to adapt to the above requirement, can assess the mechanical characterization of materials from in-service components with non-destructive manner. Now the fracture toughness assessment by SPT is empirical correlation between standard fracture toughness test and SPT without pre-cracked sample. The O-type pre-cracked sample was used in this paper to evaluate fracture toughness. The O-type crack meets with plane strain condition in the crack length direction with axi-symmetric state. The research applied the fracture mechanism to determine the fracture toughness with pre-cracked samples.