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首页> 外文期刊>Optics and Lasers in Engineering >A least-squares method to cancel rigid body displacements in a hole drilling and DSPI system for measuring residual stresses
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A least-squares method to cancel rigid body displacements in a hole drilling and DSPI system for measuring residual stresses

机译:消除钻孔和DSPI系统中用于测量残余应力的刚体位移的最小二乘法

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摘要

This paper presents the evaluation of a method to cancel rigid body displacements that can be introduced when a hole drilling and digital speckle pattern interferometry (DSPI) combined system is used to measure residual stresses. The proposed method is based on a least-square calculation of three correction parameters determined from two evaluation lines located near the edge of the phase map where the displacement field generated by the drilling process is supposed to be negligible. The errors introduced by the method for different residual stress levels and rigid body displacements are analysed using a numerical simulation. An application of the method to experimental data is also presented. (C) 2006 Elsevier Ltd. All rights reserved.
机译:本文介绍了一种消除刚体位移的方法的评估方法,该方法可在使用钻孔和数字散斑图案干涉术(DSPI)组合系统测量残余应力时引入。所提出的方法是基于对三个校正参数的最小二乘计算,该校正参数是从位于相位图边缘附近的两条评估线确定的,其中通过钻孔过程生成的位移场可以忽略不计。使用数值模拟分析了该方法针对不同残余应力水平和刚体位移引入的误差。还介绍了该方法在实验数据中的应用。 (C)2006 Elsevier Ltd.保留所有权利。

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