Measurement of Residual Stresses on Deep Rolled Round Aluminum Samples Using Hole Drilling Strain Gage Method

Hole drilling strain gage method is a semi-destructive measurement. The method is most commonly used to measure residual stresses. The relieved strains are measured around the drilled hole, and the residual stresses are estimated by the mechanical relationship between relieved strains and residual stresses as well calibration coefficients. The calibration coefficients indicate the relieved strains due to unit stresses within the hole depth. Finite element method is always used to determine the calibration coefficients, and the analytical model is based on the infinite plate. But the geometrical shape and size of cylindrical part are different from the infinite plate. The relieved strains around the drilled hole are different too. Finite element model of the cylindrical part is constructed to obtain the hole drilling calibration coefficients. The measurement of residual stresses in a cylindrical part subject to axial loading calculated by calibration coefficients of both infinite plate and cylindrical part model are compared to show the difference.

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Recent Advancements in the Hole-Drilling Strain-Gage Method for Determining Residual Stresses

New Challenges in Residual Stress Measurements and Evaluation ◽

10.5772/intechopen.90392 ◽

2020 ◽

Author(s):

Emilio Valentini ◽

Lorenzo Bertelli ◽

Alessio Benincasa ◽

Simone Gulisano

Keyword(s):

Residual Stresses ◽

Strain Gage ◽

Hole Drilling

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On the Use of the Hole-Drilling Technique for Residual Stress Measurements in Thin Plates

Journal of Pressure Vessel Technology ◽

10.1115/1.2929043 ◽

1992 ◽

Vol 114 (3) ◽

pp. 292-299 ◽

Cited By ~ 10

Author(s):

R. W. Hampton ◽

D. V. Nelson

Keyword(s):

Experimental Data ◽

Residual Stress ◽

Residual Stresses ◽

Strain Gage ◽

Surface Preparation ◽

Thin Plates ◽

Hole Drilling ◽

Thick Plates ◽

Analysis Methodology ◽

Drilling Technique

The strain gage blind hole-drilling technique may be used to determine residual stresses at and below the surface of components. In this paper, the hole-drilling analysis methodology for thick plates is reviewed, and experimental data are used to evaluate the methodology and to assess its applicability to thin plates. Data on the effects of gage pattern, surface preparation, hole spacing, hole eccentricity, and stress level are also presented.

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