Determination of Nonuniform Residual Stresses Using the Ring-Core Method

Ajovalasit, Augusto; Petrucci, G.; Zuccarello, Bernardo

doi:10.1115/1.2804891

Cited by 51 publications

(35 citation statements)

References 9 publications

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“…Whereas the hole-drilling method involves drilling a central hole and measuring the resulting deformation of the surrounding surface, the ring core method involves measuring the deformation in a central area caused by the cutting of an annular slot in the surrounding material. As with the hole-drilling method, the ring-core method has a basic implementation to evaluate in-plane stresses [10], and an incremental implementation to determine the stress profile [11]. The ring-core method has the advantage over the hole-drilling method that it provides much larger surface strains.…”

Section: Hole-drilling Techniquementioning

confidence: 99%

Methods of measuring residual stresses in components

et al. 2012

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Residual stresses occur in many manufactured structures and components. Large number of investigations have been carried out to study this phenomenon and its effect on the mechanical characteristics of these components.Over the years, different methods have been developed to measure residual stress for different types of components in order to obtain reliable assessment. The various specific methods have evolved over several decades and their practical applications have greatly benefited from the development of complementary technologies, notably in material cutting, full-field deformation measurement techniques, numerical methods and computing power. These complementary technologies have stimulated advances not only in measurement accuracy and reliability, but also in range of application; much greater detail in residual stresses measurement is now available. This paper aims to classify the different residual stresses measurement methods and to provide an overview of some of the recent advances in this area to help researchers on selecting their techniques among destructive, semi destructive and non destructive techniques depends on their application and the availabilities of those techniques. For each method scope, physical limitation, advantages and disadvantages are summarized. In the end this paper indicates some promising directions for future developments.

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Section: Hole-drilling Techniquementioning

confidence: 99%

Methods of measuring residual stresses in components

et al. 2012

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“…The proposed method belongs to the mechanical methods for the RS experimental analysis [25][26][27][28][29][30], based on the introduction of a geometry variation (through layerremoval, hole drilling, groove milling or similar procedures) on the component followed by the successive measurement of the strains relaxed on the surface.…”

Section: Proposed Methodsmentioning

confidence: 99%

Numerical-experimental Method for the Analysis of Residual Stresses in Cold-expanded Holes

Zuccarello

Franco

2012

Exp Mech

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Hole cold expansion is a technique widely used to improve the fatigue life of components with holes, e.g. bolted or riveted joints. As it has been demonstrated in literature by analytical, numerical and experimental analyses carried out by several authors, the compressive residual stresses introduced by the hole cold expansion have a beneficial influence on both the static and the fatigue strength of the treated component, because they reduce significantly the typical stress peaks around the hole due to stress concentration. In the literature, various analyses of the residual stresses introduced by the hole cold expansion have been performed by using several methods such as X-ray diffraction, neutron diffraction and the modified Sachs method. Unfortunately, all these method are affected by some limitations: low measurement depth (X-ray method), complex measurement procedure (neutron diffraction method) and approximate formulation (Sachs method). In order to overcome such drawbacks, in this study a new mechanical method, based on an innovative extension of the "rectilinear groove method" associated with the classical "integral method" calculation procedure, is proposed. Experimental assessment of the proposed method has been performed by using aluminum 5083 H321 specimens with holes subjected to various levels of cold expansion.

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“…The method can be accurate since the stress field is homogeneous throughout the thickness. Usually, only an annular grove is drilled, on the surface around the strain gauge, leaving the upper part isolated from the surrounding material and causing the stress release [10]. In the present case, the complete extraction of the core, which is possible because the thickness is not too high, ensures the complete relaxation through the whole thickness.…”

mentioning

confidence: 88%

Comparison of residual stresses on long rolled profiles measured by X-ray diffraction, ring core and the sectioning methods and simulated by FE method

Bouffioux

Pesci

Boman

et al. 2016

Thin-Walled Structures

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a b s t r a c tSheet piles are produced by hot rolling, a cooling step and, if required, by a straightening operation. Numerical simulations indicate that the stress field is almost homogeneous through the thickness, justifying the comparison of X-ray diffraction, ring core and the sectioning methods applied after the cooling step and after the straightening process. The equipment, the steps of the experimental procedures and the results are detailed, showing the limits, the specificities and the advantages of each method. Moreover, the amplitude and the distribution of the stresses along the width of the sections present good agreement with results of numerical simulations.

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Determination of Nonuniform Residual Stresses Using the Ring-Core Method

Cited by 51 publications

References 9 publications

Methods of measuring residual stresses in components

Methods of measuring residual stresses in components

Numerical-experimental Method for the Analysis of Residual Stresses in Cold-expanded Holes

Comparison of residual stresses on long rolled profiles measured by X-ray diffraction, ring core and the sectioning methods and simulated by FE method

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