Evaluating Uncertainty in Residual Stress Measured Using the Deep‐Hole Drilling Technique

Goudar, D. M.; Truman, Christopher E; Smith, David J.

doi:10.1111/j.1475-1305.2009.00620.x

Cited by 20 publications

(26 citation statements)

References 17 publications

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“…Prior to creating the reference hole, it is essential to install reference bushes [18,19]. Figure 3.5 illustrates this and shows the cross-section of a welded component with a front and rear reference bush glued to the component.…”

Section: Experimental Techniquementioning

confidence: 99%

“…Figure 3.5 illustrates this and shows the cross-section of a welded component with a front and rear reference bush glued to the component. Both bushes act as reference diameters and also permit estimates of experimental uncertainty to be determined [19]. The reference bushes do not change in shape since no residual stress is relaxed in them.…”

Section: Experimental Techniquementioning

confidence: 99%

“…Precise calibration of the probe is required to relate the back-pressure to diameter. This technique has been developed further [18,19] so that hole diameters can be measured accurately to better than 0.5 μm.…”

Section: Experimental Techniquementioning

confidence: 99%

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Deep Hole Drilling

Smith

2013

Practical Residual Stress Measurement Methods

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The Deep Hole Drilling (DHD) method belongs to the class of mechanical strain relaxation techniques designed to measure stresses and residual stresses in materials. The technique described in this chapter is now used extensively to measure both applied and locked-in stresses in many manufactured engineering materials and components. Its origins as a technique rise from its use in rock mechanics [1,2]. The procedure involves drilling a pilot borehole into the rock to the depth required for stress measurement (Figure 3.1). A device, often called a strain cell, is inserted into the borehole and then pressurized to ensure good contact with the sides of the borehole or glued into the borehole. Then material surrounding the pilot borehole is then over-cored to relax the stresses in the surrounding rock, with the strain cell monitoring the relaxed strains. An elasticity analysis is then used to convert the strains to stresses. Rock mechanics practitioners also refer to using "soft or hard inclusion" analysis for determining the stresses from the strains measured, [2][3][4] with the analysis depending on the type of strain cell used. An example of its application in rock mechanics is provided by Martin and Christiansson [3]. They describe borehole and over-coring methods where the pilot hole was 38 mm diameter and the over-core diameter 96 mm.The process of introducing a pilot hole, inserting a strain cell and then over-coring has also been developed and applied to civil engineering structures, such as bridges and concrete constructions. Ryall [5] explains a "hard inclusion" method based on overcoring. A solid steel bar, representing the "hard inclusion", is bonded into the borehole using high-modulus cement grout. The steel bar is strain gaged to permit measurement of strains during over-coring. Borehole and over-core diameters were about 42 mm and Practical Residual Stress Measurement Methods, First Edition. Edited by Gary S. Schajer.

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Section: Experimental Techniquementioning

confidence: 99%

Section: Experimental Techniquementioning

confidence: 99%

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Deep Hole Drilling

Smith

2013

Practical Residual Stress Measurement Methods

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“…Fig.6 shows the results for a thickness ratio of 1.24D and 0.64D. The results have been compared with calculated results (Black) modelled using elastic plastic behaviour [5].…”

Section: Experimental Validationmentioning

confidence: 99%

“…The first beam had dimensions of 24x10x200mm, the second beam had dimensions of 24x6.35x200mm. The beams were placed in a four point bending ring to introduce a known uniform bending residual stress in a zone large enough to attach two strain gauge rosettes [5]. On each beam a strain gauge of type CEA-062UL-120 and type CEA-125RE-120 (VISHAY tm ) was applied, giving for beam 1 a thick and intermediate thickness ratio, as summarised in Table 2.…”

Section: Experimental Validationmentioning

confidence: 99%

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

Serra¹,

Ficquet²,

Kingston³

2014

AMR

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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.

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Validation of Mechanical Strain Relaxation Methods for Stress Measurement

Goudar

Smith

2012

Exp Mech

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Evaluating Uncertainty in Residual Stress Measured Using the Deep‐Hole Drilling Technique

Cited by 20 publications

References 17 publications

Deep Hole Drilling

Deep Hole Drilling

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

Validation of Mechanical Strain Relaxation Methods for Stress Measurement

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