全尺寸管试样J_R阻力曲线测试技术的研究(二)——测试结果

Experimental Technology for Determining JR Curves by Full-scale Pipe Specimens——Experimental Results

本文介绍了实测电位标定技术,并获得了实测电位标定曲线。用全尺寸管试样测定了管道结构的JR阻力曲线,与CT试样测试结果的比较表明,用CT试样JR曲线进行管道断裂分析与缺陷评定是偏安全的。

The experimental electric potential versus circumferential crack length calibration curve was obtained during the bending experiments of three pipes. Three JK curves were determined by full-scale pipe specimens of GB20 carbon steel. Comparison of JK curves by both CT specimen and full-scale pipe specimens shows that it is safe and practical to use the CT JR curve during the fracture analysis and flaw assessment of piping.