This paper presents a new method for contour measurements using a 3D scanner to determine cross-sectional residual stresses in structural components with complex configurations. The proposed method was applied to evaluate the axial residual stress distribution in a dissimilar pipe weld and the obtained results were compared with those obtained using a benchmarked contour measurement machine (CMM) equipped with a confocal laser probe for verification. It reveals a quantitative agreement between the two methods in terms of both the measured contours and the calculated residual stresses. Most importantly, this method allows a significantly reduced measurement time by ≈99 % (≈20 min, with an effective measurement speed of ≈0.2 sec/mm²), compared to the benchmarked method (≈48 hr, with an effective measurement speed of ≈28.7 sec/mm²). Based on stress uncertainty analysis, this method guarantees a longer range of stable fits due to fewer noisy data points than the benchmarked method.

本文介绍了一种使用3D扫描仪进行轮廓测量的新方法，以确定具有复杂配置的结构部件的横截面残余应力。将所提出的方法用于评估异种管焊接中的轴向残余应力分布，并将所获得的结果与使用配备共聚焦激光探头的基准轮廓测量机（CMM）所获得的结果进行比较。它揭示了两种方法在测量轮廓和计算残余应力方面的定量一致性。最重要的是，此方法可将测量时间显着减少≈99％（≈20分钟），有效测量速度为≈0.2秒/ mm ²），而不是基准测试方法（≈48小时，有效测量速度为≈28.7sec / mm ²）。基于应力不确定性分析，与基准方法相比，该方法可确保更长的稳定拟合范围，因为其噪声数据点更少。