Determination of the Surface Stress by Means of Electroplating
Determination of the Surface Stress by Means of Electroplating
复制标题
电镀表面应力的测定
DOI：
10.1063/1.1721460
复制
发表时间：
1953
影响因子：
3.2
通讯作者：
H. Ōkubo
中科院分区：
文献类型：
--
作者：
H. Ōkubo
本文提出了一种测量表面应力的新方法。采用镀铜试样，通过观察试样表面由循环应力产生的斑点来测定试样的应力。在适当的载荷下，由于载荷的变化而引起的斑点外观的变化是非常敏感的，因此精确测定表面应力是可行的。用所描述的方法，对每个轴上都有圆周缺口的圆轴进行了扭转应力集中系数的实验计算。结果与理论值进行了比较，理论值是由作者和Sonntag先前分别推导的两个不同的公式计算出来的。实验结果与作者公式的计算结果吻合较好。
This paper presents a new method for the measurement of surface stress. By the use of test pieces plated with copper, the stress is measured by observing the flecks on the surface produced by cyclic stress. The variation in the appearance of flecks which is due to the change of load is very sensitive at a proper load, so an accurate determination of the surface stress is feasible.The stress concentration factor in torsion is obtained experimentally by the method described for circular shafts with a circumferential notch in each. The results are compared with theoretical values, calculated from two different formulas previously derived by the author and Sonntag, respectively. It is confirmed that the experimental results obtained here are in good agreement with those calculated by the author's formula.