结构钢断裂试验研究

An Experimental study on Structural Steel Fracture

为了寻求结构钢断裂机理,对10个开孔板试件进行了拉伸断裂试验,其结果表明,大部分试件第1条裂纹的出现与整个试件的宏观断裂几乎为同一时刻,变形较为明显,主要集中在孔的两侧.圆孔开孔板试件(R)的试验结果均匀稳定,长圆孔开孔板试件(LR)差异较为明显,对于长圆孔开孔板试件(LR)所出现的这种现象需做进一步的试验研究.总之,此次试验为结构钢断裂机理和抗断准则的研究提供了较为可靠的试验依据.

The axial tensile experiments were made were made on 10 plates with holes to study the rupture mechanism of the structural steel. The results indicated that the first crack and the macroscopie fracture of the whole specimen appeared at almost the same time, and that the plates with circular holes were much more stable than the plates with long circular holes that is to say,specimens （R） were better than specimens （LR）. Further studies are needed on the instablity of LR. In a word, these experiments have given reliable evidence for the mechanism and criterion of structural steel rupture.