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

参考文献：

［1］薛大为.平面应变条件下裂纹尖端附近的弹塑性近似分析[J].应用数学与力学,1980,1(1):107-112.Xue D W. An asymptotic elastic plastic analysis in plane strain deformation near a crack tip[J].Applied Mathematics and Mechanics,1980,1(1):107-112.
［2］丁华,薛松,张东,等. 基于拉伸试验的板料成形性能研究[J].锻压技术,2013,38(2):37-39.Ding H, Xue S, Zhang D, et al. Study of sheet metal forming performance based on tensile test
［J］. Forging & Stamping Technology, 2013,38(2): 37-39.
［3］任家陶,李冈陵.双向拉伸实验的进展与钛板双向拉伸的强化研究[J].实验力学，2001,16(2):196-197.Ren J T,Li G L.Biaxial tension test and the strengthening of titanium sheeets under biaxial tension[J]. Journal of Experimental Mechanics，2001,16(2):196-197.
［4］戴娟,汪大鹏,陈蕾,等．电测应力试验中应变片的粘贴技巧[J].湖南工程学院学报，2003,13(3):55-56.Dai J, Wang D P, Chen L,et al. Sticking technique of stain gauge in electrometric stress-test.[J].Journal of Hunan Institute of Engineering,2003,13(3):55-56.
［5］杨韶明,李树欣.用电阻应变片测量应力强度因子方法的研究[J].实验力学,1998,13(3):388-390.Yang S M , Li S X. A method for measuring model stress intensity factor with strain gages[J]. Journal of Experimental Mechanics，1998,13(3):388-390.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】