A generic approach for a linear elastic fracture mechanics analysis of components containing residual stress

Lee, Hyeong Y.; Nikbin, Kamran; O’Dowd, Noel P.

doi:10.1016/j.ijpvp.2005.05.001

Cited by 21 publications

(12 citation statements)

References 5 publications

(16 reference statements)

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“…18(a) are not relevant in the SIF calculation based on the superposition principle. The present profile is comparable with the 'mean+bend' profile which combines the adjustment of membrane as well as bending term [16]. Bilinear [3] Mean Bilinear [3] normalised SIF, K …”

Section: Simplificaiton Of the 'Case Specific' Residual Stress Profilsupporting

confidence: 71%

Treatment of residual stress in failure assessment procedure

Lee

Biglari

Wimpory

et al. 2006

Engineering Fracture Mechanics

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The effect of residual stress on component failure has been investigated using the distributions from current failure assessment procedures, and a residual stress profile simple to apply with less conservatism has been proposed for the weld geometries of T-plate and tubular T-joint. The Stress intensity factors (SIFs) in the two weld geometries under various types of loads have been calculated using the Green's function method. The Green's functions were determined not only for the T-plate but also for the tubular T-joint with the built-in ends. The use of a linear (bending) stress profile, derived from an analysis of measured residual stress distributions in T-plate and tubular T-joints, has been examined. The profile was validated with experimentally measured residual stress distributions in two materials, a high strength and medium strength ferritic steel and two geometries, a T-plate joint and a tubular T-joint for crack lengths up to half the plate or pipe thickness. Whereas the recommended residual stress distributions are geometry and material specific, it is shown that a simplified linear bending profile provides a possible guideline, applicable to a range of materials and geometries, where detailed information on weld procedures or residual stress profiles are unavailable.

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Section: Simplificaiton Of the 'Case Specific' Residual Stress Profilsupporting

confidence: 71%

Treatment of residual stress in failure assessment procedure

Lee

Biglari

Wimpory

et al. 2006

Engineering Fracture Mechanics

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“…Other advantages of the ultrasonic technique are the facts that instrumentation is convenient to use, quick to step up, portable, inexpensive, and free of radiation hazards. This method is suitable for routine inspection procedures for large components such as steam turbine discs [123,124].…”

Section: Ultrasonic Methodsmentioning

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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“…Such arguments have led to the membrane component of stress being classified as a long length-scale stress, bending as a medium length-scale stress, and the self-equilibrated component as a short length-scale stress [5]. Typically, structural integrity assessments focus solely on the membrane and bending components and the selfequilibrated stress is neglected completely, for example [10]. Our Fourier analysis allows a more rigorous consideration of the effects of the self-equilibrated stress…”

Section: Membrane Bending and Self-equilibrating Stressesmentioning

confidence: 99%

“…Now consider the same crack loaded by a periodic cosine residual stress function defined by: (10) where σ o is the peak stress located at mid-length of the crack, 2a is the length of crack and 2b…”

Section: Sifs For Even Stress Functions: the Cosine Fourier Termsmentioning

confidence: 99%

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Fourier basis for the engineering assessment of cracks in residual stress fields

Bouchard

Budden

Withers

2012

Engineering Fracture Mechanics

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A theoretical basis is presented for determining the significance of a residual stress distribution of arbitrary shape on the crack tip stress intensity factor for a centre-cracked plate as a function of crack length. The Fourier series based approach enables one to increasingly add more spatial definition to the stress field and thereby determine the level of detailed knowledge of the residual stress required to make a reliable assessment of structural integrity.The approach is applied to examples of measured symmetric distributions of residual stresses in welded plates and used to determine the significance of residual stress length-scales in fracture mechanics analysis.Keywords: membrane; bending; self-equilibrated stress; stress intensity factor; structural assessment

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A generic approach for a linear elastic fracture mechanics analysis of components containing residual stress

Cited by 21 publications

References 5 publications

Treatment of residual stress in failure assessment procedure

Treatment of residual stress in failure assessment procedure

Methods of measuring residual stresses in components

Fourier basis for the engineering assessment of cracks in residual stress fields

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