High sensitivity moiré interferometry and incremental hole-drilling method for residual stress measurement

Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI:10.1016/S1620-7742(01)01371-X

Zhu Wu, Guillaume Montay, Jian Lu

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引用次数: 4

Abstract

The theoretical development of a combined method of moiré interferometry, Twyman–Green interferometry and incremental hole-drilling method is presented. The relationship between the three-dimensional surface displacements produced by introducing a blind hole and the corresponding residual stress is established by employing the existing theoretical solution containing a set of undetermined coefficients. The in-plane surface displacements $U_{x}$ and $U_{y}$ and out of plane surface displacement $U_{z}$ produced by the relaxation of residual stresses are obtained from moiré interferometry and Twyman–Green interferometry respectively. The accuracy of the method and the experimental procedure to determine the signs of residual stresses are described. A typical examp1e is presented.

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高灵敏度干涉法和增量钻孔法测量残余应力

介绍了涡流干涉法、特怀曼-格林干涉法和增量钻孔法相结合的理论发展。利用含一组待定系数的现有理论解，建立了引入盲孔产生的三维表面位移与相应的残余应力之间的关系。通过莫尔干涉法和Twyman-Green干涉法分别获得了残余应力松弛产生的面内表面位移Ux和Uy以及面外表面位移Uz。描述了该方法的准确性和确定残余应力迹象的实验程序。给出了一个典型的例子。

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Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics

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