Measurement of Residual Stresses Near the Surface Using the Crack Compliance Method

Wan, Cheng; Finnie, I.; Vardar, Öktem

doi:10.1115/1.2903392

Cited by 37 publications

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“…With the roughmg mode cut, the correction was fairly substantial, but this was considered to be partially due to the low magnitude of the residual stresses. Cheng et al (1992d) and Gremaud et al (1992) reported results from very similar tests on specimens prepared in this same manner. Cheng et al (1994b) measured the near-surface residual stress distribution on a shotpeened titanium part.…”

Section: Iva2 Near-surface Stressessupporting

confidence: 60%

“…Cheng and Finnie (1990b) noted that, for measuring through-thickness longitudinal stresses in a plate, excluding the O* and lst order terms guarantees the satisfaction of stress and moment equilibrium. Cheng et al (1992dCheng et al ( , 1993b) successfully used such a series with n = 9. Cheng and Finnie (199313) averaged between successive orders of the series expansion (i.e., 8th and 9th), presumably to minimize endpoint instability.…”

Section: Endpoint Stabilitymentioning

confidence: 99%

“…Hole drilling has increased sensitivity, and compliance has even greater sensitivity. Cheng et al (1991a) explicitly compared the sensitivity of compliance to hole drilling and showed compliance to be superior. One drawback of sensitivity is that it generally also corresponds to a greater propensity to yielding at high stress levels, which leads to errors.…”

Section: Vb Sensitivitymentioning

confidence: 99%

“…The results were used to map the residual stresses in compact tension specimens cut from the welded plates. Cheng et al (1992d) measured residual stresses through the thickness of a beam having a known residual stress distribution. The beam was made of stress-relieved 304 stainless steel and had a 19 mm square cross section.…”

Section: Ival Through-thickness Stressesmentioning

confidence: 99%

“…Cheng et al (1991a) also used a power series expansion for measuring stresses near the surface. Fett and Thun (1996b) used the symmetry when measuring axisyrnmetric hoop stresses through the thickness of a solid disk and used only even terms in a power series expansion.…”

Section: Series Expansion Applied To Compliancementioning

confidence: 99%

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Residual stress measurement by successive extension of a slot: A literature review

Prime¹

1997

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Ukl MSfRlBUTION OF THIS DOCUMENT I S UNLlMlTEb Los Alamos ABSTRACTThis report reviews the technical literature on techniques that employ successive extension of a slot and the resulting deformations to measure residual stress. Such techniques are known variously in the literature as the compliance or crack compliance method, the successive cracking method, the slotting method, and a fracture mechanics based approach. The report introduces the field and describes the basic aspects of these methods. The report then reviews all literature on the theoretical developments of the method. The theory portion first considers forward method solutions including fracture mechanics, finite element, analytical, and body force methods. Then it examines inverse solutions, including incremental inverses and series expansions. Next, the report reviews all experimental applications of slotting methods. Aspects reviewed include the specimen geometry and material, the details of making the slot, the method used to measure deformation, and the theoretical solutions used to solve for stress. Finally, the report makes a brief qualitative comparison between slotting methods and other residual stress measurement methods.

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Section: Iva2 Near-surface Stressessupporting

confidence: 60%

Section: Endpoint Stabilitymentioning

confidence: 99%

Section: Vb Sensitivitymentioning

confidence: 99%

Section: Ival Through-thickness Stressesmentioning

confidence: 99%

Section: Series Expansion Applied To Compliancementioning

confidence: 99%

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Residual stress measurement by successive extension of a slot: A literature review

Prime¹

1997

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The Slitting Method

Hill

2013

Practical Residual Stress Measurement Methods

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The slitting method is a mechanical relaxation technique capable of measuring a single in-plane normal component of residual stress through the thickness of a material. The method originally developed by Finnie and co-workers [1][2][3][4][5], has been reviewed in detail by Prime [6], and is the subject of a recent monograph by Cheng and Finnie [7]. The method has been called by various names in earlier work, including "crack compliance method," or simply the "compliance method," but ASTM Task Group E28.13.02 suggested using "slitting method" going forward to highlight a useful parallel between slitting and the "hole drilling method." Slitting has great utility for practical laboratory residual stress measurements because it is relatively simple to perform, can be done quickly, and offers excellent repeatability [8]. This chapter is intended to complement the extensive technical background existing presently in the literature, much of it summarized in [6] and [7], with a practical treatment useful to those interested in making measurements. Another source for useful practical information on slitting is the internet resource maintained by Prime [9].In slitting, a planar slit is introduced by incrementally cutting into a material containing residual stresses in steps of increasing depth. Deformation near the slit, arising from release of residual stress on the (newly traction-free) slit faces, is measured as a function of increasing slit depth and used to determine residual stress existing normal to the slit plane prior to slitting. Much of this chapter considers a common implementation of slitting, where through thickness residual stress in a metallic flat block is determined from strain measured at the back face of the block by a strain gage, see Figure 4.1. However, the method has sufficient flexibility to enable measurements of residual stresses in a variety Practical Residual Stress Measurement Methods, First Edition. Edited by Gary S. Schajer.

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Residual Stress Measurement and the Slitting Method

2007

Mechanical Engineering Series

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Measurement of Residual Stresses Near the Surface Using the Crack Compliance Method

Cited by 37 publications

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Residual stress measurement by successive extension of a slot: A literature review

Residual stress measurement by successive extension of a slot: A literature review

The Slitting Method

Residual Stress Measurement and the Slitting Method

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