锻压技术

不同加载路径下预裂纹50W800G硅钢板的拉伸性能

英文标题：Tensile performance of 50W800G silicon steel sheet with fore-flaw under different loading conditions

作者：何玉林孙明军

关键词：硅钢板预裂纹加载路径

分类号：TG142

出版年,卷(期):页码：2013,38(5):70-73

摘要：

研究了50W800G硅钢板在不同加载路径下预裂纹试样的应力应变关系。结果表明：单轴45°和90°裂纹尖端垂直于裂纹线方向的应力应变曲线，其弹性模量与屈服强度较光滑试样都降低，说明了裂纹尖端应力、应变场的奇异性；双轴45°和90°裂纹尖端的应力应变曲线，在载荷比2∶1和3∶1时，裂纹尖端的应力虽有增加，但应变增加缓慢，应力应变曲线高于载荷比1∶1的加载曲线。

The stress strain relation of the fore-flaw sample for 50W800G silicon steel sheet under different loading conditions was discussed. The results show that in the stress-strain curves of 45° and 90° crack tip of the single axial perpendicular to the direction of the crack line，the elastic modulus and yield strength are lower than the smooth samples，which explains the singularity of the crack tips stress and strain field. The stress-strain curves of 45° and 90° crack tip of the double axles show that the stress increases slowly under load ratio of 2∶1 and 3∶1，and the curve of stress-strain is higher than that of load ratio 1∶1.

基金项目：

何玉林(1975- )，女，硕士，讲师

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