在具有矩形截面的平板或棒材的双面剥层X射线应力测定中,可以用幂级数来分段近似沿厚度方向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.文中给出计算应力校正量的公式,并且用实测例说明,用项数不多的幂级数来近似实测应力曲线,就能得到足够高的近似程度,获得令人满意的校正结果. In the determination of the double-sided peeling X-ray stress of a flat plate or a bar having a rectangular cross-section, the actual stress curve of the peeling surface that changes in the thickness direction can be approximated by the power series to calculate the additional stress , The distribution of the original true stress along the thickness direction is obtained.The formulas for calculating the amount of stress correction are given in this paper.And with the practical examples, we can get a sufficiently high approximation by approximating the measured stress curve with a few power series. Degree, get satisfactory calibration results.