摘要
本文分析了具有同样厚度不同宽度的带侧槽(side groove)HY-130钢三点弯曲深切口(deep notch)试样的J-R曲线(即J-△α曲线)的特性。发现当裂纹在有限载荷下扩展相同长度时,愈宽的试样的J积分值较小。认为这种现象与裂纹尖端塑性区尺寸有着密切的关系。
The character of J-R curve for tripoint bending deep notch testing sample ofHY-130 steel with the same thickness but different width side groove is analyzed. It isfound that the J-integral quantity of the wider sample is less, when the length of crackextension is the same subjected to the finite load. This phenomenon is believed to be as-sociated with the size of the plastic zone for the crack front of the sample.
关键词
裂纹
侧槽
J-R曲线
HY-130钢
crack propagation
toughness / HY-130 steel
J-R curve
side groove
