In this study, a numerical approach for evaluating the SCF of corroded steel plates with irregular surface was investigated. Complex surfaces were dissembled into sinusoidal waves by FFT and the SCF was calculated using the shape parameters of the derived waves. 3-dimensional surface data was divided into 2-dimensional data in direction of load and the width of pitting corrosion was assumed to be the same in all directions. Compared to results of FEA, the SCF has a percentage error of 0.8% and 10 largest SCFs were detected at the same location with the maximum percentage error of 2.2%.

中文翻译：

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快速傅里叶变换评估腐蚀表面应力集中系数的简单方法

在这项研究中，研究了一种用于评估具有不规则表面的腐蚀钢板的SCF的数值方法。通过FFT将复杂的表面分解为正弦波，并使用导出波的形状参数计算SCF。将3维表面数据在载荷方向上分为2维数据，并且假定点蚀的宽度在所有方向上都相同。与有限元分析的结果相比，SCF的百分比误差为0.8％，在同一位置检测到10个最大的SCF，最大百分比误差为2.2％。