期刊
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
卷 38, 期 9, 页码 1076-1086出版社
WILEY
DOI: 10.1111/ffe.12321
关键词
fatigue limit; carbon steels; the root area parameter model; tilted small defect; non-propagating crack
资金
- Spanish Government [DPI2008-01100, DPI2011-27019]
In order to clarify the effect of defect orientation on the fatigue limit of two types of steels, JIS- S15Cand JIS- S45C, a small semi- circular slit was introduced onto the surface of a round specimen. The slit was tilted at 0 degrees, 30 degrees or 60 degrees with respect to the plane normal to the loading axis, but all of themhad the same defect size, root area= 188 mu m, where the area denotes the area of the domain defined by projecting the defect on a plane normal to the loading axis. In all the combinations of the materials and tilt angles, a non- propagating crack was found at or just belowthe fatigue limit, that is, the fatigue limitwas determined by the non- propagation condition of a crack initiated from the defect. In both steels, the fatigue limit was found to be nearly independent of the tilt angle for the same value of projected size root area, which was in good agreement with the prediction by root area parametermodel. In this paper, a mechanistic explanation for the insensitivity of the fatigue limit to the tilt angle is proposed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据