压力容器接管区高应变场裂纹扩展试验研究

EXPERIMENTAL STUDY OF CRACKS EXTENSION OF HIGH STRAIN GRADIENT IN PRESSURE VESSEL NOZZLE REGION

针对压力容器接管区应变场三种主要特征——局部高峰应变、高应变梯度和周围受强大的弹性约束，设计出一种带中心孔高应变梯度异形试板，有效地摸拟圆筒压力容器接管区高应变场裂纹的ＥＰＦＭ的试验研究。

This paper tries to hold closely the nozzle region strain field's three main characteristics--local high top strain, local high strain gradient, and being seyerely restrained around by elastic area,design a high strain gradient special shape plate with a central hole,so as to effectively make simulating experimental study of the cracks' EPFM in the region of high gradient of nozzle corner in cylindrical pressure vessel.