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在具有矩形截面的平板或棒材的单面剥层 X 射线应力测定中,可以用幂级数来分段近似沿层深变化的剥离面的实测应力曲线,从而计算剥层所产生的附加应力,求得原始真实应力沿厚度方向的分布。文中给出了计算应力校正量的公式,并且用两个实测例说明,用项数不多的幂级数来近似实测曲线,就能得到足够高的近似程度.这种近似对计算结果的影响远小于 X 射线应力测量误差的影响.
In single-sided peel-off X-ray stress measurement of a flat plate or bar having a rectangular cross-section, the measured stress curve of the peeled surface that varies along the depth of the layer can be approximated by the power series to calculate the additional stress , Find the original true stress distribution along the thickness direction. In this paper, the formula for calculating the amount of stress correction is given, and two practical examples show that approximating the measured curve with a few power series can obtain a sufficiently high degree of approximation. The effect of this approximation on the calculation results Far less than the impact of X-ray stress measurement error.