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

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.

A Procedure to Measure Biaxial Near Yield Residual Stresses Using the Deep Hole Drilling Technique

2013 ◽  
Vol 53 (7) ◽  
pp. 1223-1231 ◽  
Author(s):  
A. H. Mahmoudi ◽  
G. Zheng ◽  
D. J. Smith ◽  
C. E. Truman ◽  
M. J. Pavier
Keyword(s):  
Residual Stresses ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Drilling Technique

DETERMINING RESIDUAL STRESSES IN WELDED CONNECTIONS OF ORTHOTROPIC STEEL BRIDGE DECKS WITH A HOLE-DRILLING TECHNIQUE

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Wim Nagy ◽  
Philippe Van Bogaert ◽  
Hans De Backer
Keyword(s):  
Yield Strength ◽  
Residual Stresses ◽  
Experimental Test ◽  
Bridge Decks ◽  
Hole Drilling ◽  
Material Strength ◽  
Steel Bridge ◽  
Test Setup ◽  
Deck Plate ◽  
Drilling Technique

Manufacturing processes such as welding operations cause residual stresses that are present in most civil structures. They cause plastic deformations without any external loads and are therefore often overlooked during design. Nevertheless, residual stresses can have profound influences on material strength and fatigue life. This is also true for orthotropic steel bridge decks, which have many complex welding details. Because little is known about the distribution of residual stresses due to welding, a semi-destructive experimental test setup is developed for a stiffener-to-deck plate connection on an orthotropic steel bridge deck. In particular, the hole-drilling technique is used. With this experimental test setup, a clear distribution of the residuals stresses becomes visible. Residual stresses up to the yield strength can be found near the weld and up to 50% of the yield strength elsewhere. However, more research is needed to verify why the sign of the stresses is opposite to the expected stresses in the literature.

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.

Measurement of Residual Stresses in the Cold-Rolled Fe-Ni-Mn/Invar Thermo-Bimetallic Plate

2013 ◽  
Vol 768-769 ◽  
pp. 101-106
Author(s):  
Harri Lille ◽  
Jakub Kõo ◽  
Jaak Valgur ◽  
Alexander Ryabchikov ◽  
Renno Reitsnik ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Electrochemical Etching ◽  
Hole Drilling ◽  
Drilling Technique ◽  
Cold Rolled ◽  
Bimetallic Plate ◽  
Compressive Residual Stresses

The paper presents a method for measuring residual stresses in normal thermo-bimetal Fe-Ni-Mn/Invar strips with a thickness of 0.76 mm. For this purpose, a setup was designed which permits to remove layers from a strip substrate by electrochemical etching. Residual stresses in the directions that are longitudinal and transversal to rolling are determined by the curvature method based on the layer growing/removing techniques. As a reference, residual stresses were also determined by hole-drilling technique. Tensile and compressive residual stresses arose both in active and in passive layers and were considerably higher when determined by the hole-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.

A New Procedure to Measure Near Yield Residual Stresses Using the Deep Hole Drilling Technique

2008 ◽  
Vol 49 (4) ◽  
pp. 595-604 ◽  
Author(s):  
A. H. Mahmoudi ◽  
S. Hossain ◽  
C. E. Truman ◽  
D. J. Smith ◽  
M. J. Pavier
Keyword(s):  
Residual Stresses ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Drilling Technique

Measurement of Residual Stresses in Thick Section Steel Electron Beam Welds

2010 ◽  
Author(s):  
E. Kingston ◽  
D. J. Smith ◽  
G. Zheng ◽  
C. Gill ◽  
P. Hurrell
Keyword(s):  
Heat Treatment ◽  
Electron Beam ◽  
Residual Stresses ◽  
Post Weld Heat Treatment ◽  
Hole Drilling ◽  
Drilling Technique ◽  
Fair Comparison ◽  
Before And After ◽  
Hoop Stresses ◽  
Weld Heat

Residual stresses were measured and predicted in steel electron beam welded samples, one supplied by Rolls-Royce, UK, and a second by CEA, France. In the case of the Rolls-Royce sample, measurements were made before and after post-weld heat treatment. The deep hole drilling technique was applied to obtain measurements across and through the EB welds. It is shown that the tensile residual stresses are confined to a region either side of the EB weld that corresponds to about 20% of the wall thickness. Post-weld heat treatment is shown to substantially reduce the magnitudes of the peak residual stresses. Comparisons between measurements and predicted residual stresses in the Rolls-Royce sample show that predicted hoop stresses are substantially greater than measured although there is a fair comparison between measured and predicted radial stresses.

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