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

1992 ◽  
Vol 114 (3) ◽  
pp. 292-299 ◽  
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.

Analysis and Optimization of the Deep-Hole Drilling Technique in Measuring Complex Residual Stress

2017 ◽  
Author(s):  
Gang Zheng ◽  
Sayeed Hossain ◽  
Feng Shen ◽  
Chris Truman
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Longitudinal Axis ◽  
Hole Drilling ◽  
Internal Diameter ◽  
Deep Hole ◽  
Element Analysis ◽  
Deep Hole Drilling ◽  
Drilling Technique ◽  
Technique Comparison

The aim of the present study was to utilize a complex residual stress generated within a welded circular disc to further investigate the standard deep-hole drilling (DHD) technique and the newly developed over-coring deep-hole drilling (oDHD) technique in accurately measuring residual stresses well over yield stress. Finite Element Analysis (FEA) was used to optimize and extend the deep-hole drilling technique and improve its accuracy. The standard DHD procedure involves 4 steps. (1) A reference hole is gun-drilled through the component. (2) The internal diameter of the reference hole is measured at different angular positions through the depth of the component. (3) A cylindrical section with the reference hole as its longitudinal axis is trepanned free from the component. (4) Finally, the relaxed internal diameter is re-measured at the same angular positions and the same depths. The drilling, trepanning procedures and the parameters of the deep-hole drilling technique were all studied in detail to optimize the technique. Comparison is made between the FEA predicted residual stress in the weld, the measurements and the reconstructed residual stresses of the measurements. The close correlations confirmed the suitability of new modifications made in the deep-hole drilling technique to account for plasticity when measuring near yield residual stresses present in a component.

A modified hole-drilling technique for determining residual stresses in thin plates

1976 ◽  
Vol 16 (6) ◽  
pp. 226-232 ◽  
Author(s):  
A. M. Nawwar ◽  
K. McLachlan ◽  
J. Shewchuk
Keyword(s):  
Residual Stresses ◽  
Thin Plates ◽  
Hole Drilling ◽  
Drilling Technique

scholarly journals Assessing Shot-Peening Residual Stresses by Using the Incremental Hole-Drilling Technique and Laser Interferometry (DSPI)

2014 ◽  
Vol 996 ◽  
pp. 269-276
Author(s):  
João P. Nobre ◽  
Miguel Oliveira ◽  
Armando Albertazzi ◽  
Matias Viotti ◽  
António Castanhola Batista ◽  
...  
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Shot Peening ◽  
Speckle Pattern ◽  
Strain Relaxation ◽  
Laser Interferometry ◽  
Hole Drilling ◽  
X Ray Diffraction ◽  
Incremental Hole Drilling ◽  
Drilling Technique

The incremental hole-drilling technique was applied to determine residual stress profiles in shot-peened steel layers. The accuracy of using an enhanced Digital Speckle Pattern Interferometry technique for measuring the strain relaxation arising around the drilled holes and, consequently, the in-depth residual stress distribution induced by shot-peening, was evaluated. The experimental results were systematically compared with those determined using standard electric strain-gauges. The X-ray diffraction technique was chosen as reference due to its high accuracy to determine shot-peening residual stresses.

scholarly journals Residual Stress Measurement Using the Hole Drilling Technique on Components outside the ASTM E837 Standard

2014 ◽  
Vol 996 ◽  
pp. 301-306 ◽  
Author(s):  
Yann Serra ◽  
Xavier Ficquet ◽  
Ed Kingston
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Measurement Technique ◽  
Stress Measurement ◽  
Residual Stress Measurement ◽  
Hole Drilling ◽  
Drilling Technique ◽  
Astm E837

The hole drilling technique is probably the most widely used residual stress measurement technique. The ASTM E837 standard covers hole drilling measurements for thin and thick specimens. VEQTER have encountered several cases when the specimen was between the thick and thin specification. In order to gain a greater understanding of the sensitivity of the analyses and accurately measure the residual stresses using the hole drilling technique within intermediate thickness specimens and within thin specimens containing non-uniform residual stresses a study was performed.

Measuring Residual Stresses by Hole-Drilling and Coherent Optics Techniques: A Numerical Calibration

1991 ◽  
Vol 113 (1) ◽  
pp. 41-50 ◽  
Author(s):  
F. M. Furgiuele ◽  
L. Pagnotta ◽  
A. Poggialini
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Residual Stresses ◽  
Strain Gage ◽  
Displacement Component ◽  
Hole Drilling ◽  
Residual Stress Field ◽  
Relaxation Data ◽  
Coherent Optics ◽  
Fringe Patterns

Hole-drilling is a widely accepted method for determining residual stresses from the relaxation data obtained by a strain-gage rosette. Several researchers have recently investigated the alternative of employing interferometric techniques to reveal the displacement field produced by hole-drilling. As in the case of the standardized hole-drilling strain-gage method, proper calibration constants must be assessed so that this procedure can be effectively employed. This paper reports the displacement calibration constants derived from the results of an extensive numerical analysis. The constants proposed enable a uniform residual stress field to be determined, whatever the displacement component detected. The most commonly employed coherent optics techniques have been considered; computer-generated fringe patterns are reported and criteria are suggested to derive the stress field from fringe readings taken around the edge of the hole.

Experimental Method for Residual Stress Evaluation Through the Thickness of a Plate

2002 ◽  
Vol 124 (4) ◽  
pp. 428-433 ◽  
Author(s):  
Lars Fuglsang Andersen
Keyword(s):  
Residual Stress ◽  
Experimental Method ◽  
Plate Thickness ◽  
Hole Drilling ◽  
Calculation Error ◽  
Thick Plates ◽  
Stress Evaluation ◽  
Stress Calculation ◽  
Incremental Hole Drilling ◽  
Drilling Technique

In the present work an experimental method is developed for residual stress evaluation in medium thick plates. On the basis of the incremental hole-drilling technique, a method to resolve the in-plane residual stresses through the plate thickness is given. An analysis of the hole-drilling configuration is carried out, resulting in a configuration which optimizes the stress calculation accuracy. Moreover, it is estimated that conventional milling can be applied without affecting the accuracy of the method. Finally, the results of a comprehensive stress calculation error analysis are presented.

Application of the Modified Deep Hole Drilling Technique (iDHD) for Measuring Near Yield Non-Axisymmetric Residual Stresses

2009 ◽  
Author(s):  
Amir-Hossein Mahmoudi ◽  
David J. Smith ◽  
Chris E. Truman ◽  
Martyn J. Pavier
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Stress Fields ◽  
Hole Drilling ◽  
Deep Hole ◽  
Axisymmetric Stress ◽  
Deep Hole Drilling ◽  
Element Simulation ◽  
Drilling Technique ◽  
Shrink Fit

The modified deep hole drilling technique (iDHD) has been developed to allow near yield residual stresses to be measured and has been validated for axisymmetric residual stress fields. In the present investigation, the application of the iDHD technique was extended to non-axisymmetric stress fields. First, a finite element simulation of the iDHD technique was carried out to demonstrate its effectiveness at measuring near yield residual stress. Experimental measurements were then carried out on shrink fit specimens to investigate the performance of the technique in practice. These shrink fit specimens were assembled in such a way that either axisymmetric or non-axisymmetric stress fields could be generated. The results indicated that the iDHD technique is capable of measuring non-axisymmetric residual stresses in presence of plasticity.

Measurement of Residual Stresses in Large Industrial Components Using the Deep Hole Drilling Technique

2005 ◽  
Author(s):  
X. Ficquet ◽  
C. E. Truman ◽  
D. J. Smith ◽  
T. B. Brown ◽  
T. A. Dauda
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Excellent Agreement ◽  
Stress Component ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Drilling Technique ◽  
Compressive Residual Stresses

“ELIXIR – Extending Plant Life Through Improved Fabrication and Advanced Repair Methodology” was a European Union FP5 sponsored project. During the duration of the Elixir project, much work was directed at providing the necessary data for the validation of numerical modelling techniques applied to residual stress generation and hydrogen diffusion arising from the welding process. The project focussed around four industrial applications, namely petrochemical, boiler, offshore and submarine. This paper presents through-thickness residual stress measurements obtained by the University of Bristol on two of the large industrial components. The results were obtained using the deep hole drilling technique and compared to Finite Element predictions provided by other partners. The components considered are a large P275 steel set-in nozzle, typical of a boiler application and a large S690 steel set-on nozzle, typical of an offshore application. The boiler application consisted of a nozzle of diameter 600mm and thickness 50mm, on a pipe of diameter 1100mm and 100mm thickness. The offshore application was a nozzle of diameter 900mm and thickness 50mm, on a pipe of diameter 1050mm and 50mm thickness. Both the longitudinal and transverse stresses measured using deep hole drilling showed excellent agreement with Finite Element predictions through the thickness of the boiler sample. On the top surface, a zone of tensile residual stresses, over a distance of approximately 40mm, was revealed, which was equilibrated by a zone of compressive residual stresses over the final 50mm of thickness. Results for the offshore application demonstrated that at the front surface, both of the stress components were essentially zero, but both the longitudinal and transverse components rose rapidly to maxima of approximately 500MPa and 220MPa, respectively. Tensile residual stresses were supported over a distance of approximately 30mm. Over the final 20mm of thickness, compressive residual stresses existed, which again fell to approximately zero on the back face. There is excellent agreement between measurements and the Finite Element predictions for the transverse stress component, but less good agreement between measurements and predictions of the longitudinal stress component.

Evaluation of Welding Residual Stresses Using the Incremental Hole-Drilling Technique

2006 ◽  
Vol 514-516 ◽  
pp. 768-773
Author(s):  
Joao P. Nobre ◽  
Altino Loureiro ◽  
António Castanhola Batista ◽  
A. Morão Dias
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Numerical Study ◽  
Hole Drilling ◽  
The Finite Element Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Plasticity Effect ◽  
Incremental Hole Drilling ◽  
Drilling Technique

In this work the reliability of the hole-drilling technique (HDT) for measuring welding residual stresses was analysed. HDT residual stress results were systematically compared with those determined by X-ray diffraction. A systematic overestimation of the residual stresses determined by HDT was observed, which was mainly attributed to the possibility of the so-called plasticity effect occurring. Experimental results were discussed taking the measurement principles of both techniques into consideration. In addition, preliminary results of a numerical study, using the finite element method, will be presented for a better understanding of the plasticity effect on HDT residual stress results.

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