基于等半径圆弧劈裂法的核石墨圆盘抗拉强度测量  

Tensile Strength Measurement of Nuclear Graphite Disc Based onDisc Splitting Method with Equal Radius Arc Loading

作　　者：林广 马沁巍[1] 刘广彦 孙立斌[2] 史力[2] 马少鹏 LIN Guang;MA Qin-wei;LIU Guang-yan;SUN Li-bin;SHI Li;MA Shao-peng(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;Instituteof Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China;School of NavalArchitecture,Ocean&Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]清华大学核能与新能源技术研究院,北京100084 [3]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《现代应用物理》2021年第2期114-120,共7页Modern Applied Physics

基　　金：国家自然科学基金资助项目(11872115;11727801;11772053)。

摘　　要：以IG11型核石墨材料为研究对象,通过圆盘压缩试验,对比了平板劈裂法、垫条劈裂法、ISRM标准圆弧劈裂法和等半径圆弧劈裂法测量抗拉强度的适用性。实验结果表明,只有等半径圆弧劈裂法可以保证核石墨圆盘从中心起裂,从而获得准确的抗拉强度;IG11型核石墨6个试件的平均抗拉强度为24.8 MPa。Nuclear graphite is an artificial graphite widely used in nuclear reactors,especially in high temperature gas cooled reactors.As a kind of brittle material,its tensile strength is one of the critical mechanical parameters in the design and application of nuclear graphite components.Brazilian splitting method can ensure the disc specimen of rock-like brittle materials cracking from the disc center during loading,and realize the measurement of tensile strength.In this paper,taking IG11 nuclear graphite material as an object of study,the disc compression experiments are conducted to compare three traditional Brazilian splitting methods including flatten splitting method,cushion-strip splitting method,ISRM standard-arc splitting method with disc splitting method with equal radius arc loading for tensile strength measurement results.The results show that only the disc splitting method with equal radius arc loading can ensure the nuclear graphite disc to crack from the center and obtain the accurate tensile strength of the material.

关 键 词：核石墨 抗拉强度 等半径圆弧劈裂法 中心起裂 传统巴西劈裂法 

分 类 号：TB301[一般工业技术—材料科学与工程]