低碳钢含裂纹管道四点弯曲作用下弹塑性裂纹扩展的试验研究

Experimental Study on Carbon-steel Pipe Containing a Circumferential Through-wall crack under Four Points Bending

本文对不同直径、不同厚度及不同裂纹长度低碳钢管模拟环向穿透裂纹四点弯曲进行了试验研究，详细描述了试验的装置、试验过程及现象。给出了实测ＪＲ阻力曲线及失稳载荷与裂纹长度的关系。

Abstract The paper studied different diameter、thickness and length of the crack by imitating circumferential through-wall crack on carbon-steel pipe under four points bending.It described experimental device、process and phenomena,and gave the expression between experimental J R resistant curve、deactivate load and length of crack.