A method for reconstruction of residual stress fields from measurements made in an incompatible region

Coules, Harry; Smith, David J.; Venkata, Kiranmayi Abburi; Truman, Christopher E

doi:10.1016/j.ijsolstr.2014.02.008

Cited by 33 publications

(12 citation statements)

References 29 publications

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“…3). An estimate of the complete residual stress state in the un-notched specimens was reconstructed from measured residual elastic strain data using the iterative technique described previously by Coules et al [24] and others [25,26]. First, three Fig.…”

Section: Combined Experimental/modelling Approachmentioning

confidence: 99%

“…Firstly, a relatively large quantity of measured data is required to reconstruct the residual stress field surrounding the crack accurately. The data requirement for reconstruction is discussed by Coules et al [24]. In this study, we used neutron diffraction to measure the residual stress field, resulting in a measured 2D strain map at reasonably high spatial resolution of 2.5 mm (Fig.…”

Section: Limitationsmentioning

confidence: 99%

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A Combined Experimental and Modelling Approach to Elastic–Plastic Crack Driving Force Calculation in the Presence of Residual Stresses

et al. 2016

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Since all residual stress measurement methods have inherent limitations, it is normally impractical to completely characterise a three-dimensional residual stress field by experimental means. This lack of complete information makes it difficult to incorporate measured residual stress data into the analysis of elastic-plastic fracture without resorting to simplified methods such as the Failure Assessment Diagram (FAD) approach. We propose a technique in which the complete residual stress field is reconstructed from measurements and used in finite element analysis of the fracture process. Residual elastic strains and stresses in three-point bend fracture specimens were measured using neutron diffraction and an iterative method was used to generate a self-consistent estimate of the complete residual stress field. This enabled calculation of the J contour integral for a specimen acted on by both residual stress and an externally-applied load, allowing the interaction between residual and applied stress to be observed in detail.

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Section: Combined Experimental/modelling Approachmentioning

confidence: 99%

Section: Limitationsmentioning

confidence: 99%

A Combined Experimental and Modelling Approach to Elastic–Plastic Crack Driving Force Calculation in the Presence of Residual Stresses

et al. 2016

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“…Consequently most measurements are restricted and hence resulted in relatively incomplete experimental information. So, there is great practical value in inferring the complete residual stress field from a limited number of measurements (Coules et al, 2014).…”

Section: Latin American Journal Of Solids and Structures 12 (2015) 23mentioning

confidence: 99%

A Note on the Inverse Reconstruction of Residual Fields in Surface Peened Plates

Faghidian

2015

Lat. Am. j. solids struct.

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A modified stress function approach is developed here to reconstruct induced stress, residual stress and eigenstrain fields from limited experimental measurements. The present approach is successfully applied to three experimental measurements set in surface peened plates with shallow shot peening affected zone. The well-rehearsed advantage of the proposed approach is that it not only minimizes the deviation of measurements from its approximations but also will result in an inverse solution satisfying a full range of continuum mechanics requirements. Also, the effect of component thickness as a geometric parameter influencing the residual stress state is comprehensively studied. A key finding of present study is that the plate thickness has no influence on the maximum magnitude of eigenstrain profile and compressive residual stresses within the shot peening affected zone while having a great influence on the magnitude of tensile residual stress and the gradient of linear residual stresses present in deeper regions.

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“…Several researchers have calculated and measured the extent of residual stresses induced by various mechanical processes using commercial software, numerical modeling as well as experimental methods including destructive and non-destructive methods [5][6][7][8][9][10][11]. For instance, Kartal et al [5] introduced a method for developing the capability of the inverse problem of Eigenstrain to determine the varying multi-axial residual stresses at the micro-scale level.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Measurements of Residual Stresses Caused by Severe Thermomechanical Deformation during FSW

et al. 2014

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In engineering processes, residual stresses can be intense once high plastic deformation and temperature gradient are involved. This is exactly the case for friction stir welding (FSW) in which both rotational and translational movements of the tool induce extreme temperature gradient and plastic deformation. In this research, the extents of longitudinal and transverse residual stresses are measured within the AA7075-T6 plates welded through FSW process using ultrasonic method. According to the obtained results, it can be found that the residual stress is of the tensile type adjacent to the welding line whereas it is of the compressive type far from the welding line. Another observation is that the longitudinal residual stresses are considerably greater than the transverse residual stresses. Furthermore, with the aim of investigating the effects of rotation and traverse velocities of the tool on residual stress, experiments are carried out at three different rotation and traverse velocities. Based on the acquired results, it is observed that upon increasing the rotation and traverse velocities, the longitudinal and transverse residual stresses decrease and increase, respectively.

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A method for reconstruction of residual stress fields from measurements made in an incompatible region

Cited by 33 publications

References 29 publications

A Combined Experimental and Modelling Approach to Elastic–Plastic Crack Driving Force Calculation in the Presence of Residual Stresses

A Combined Experimental and Modelling Approach to Elastic–Plastic Crack Driving Force Calculation in the Presence of Residual Stresses

A Note on the Inverse Reconstruction of Residual Fields in Surface Peened Plates

Ultrasonic Measurements of Residual Stresses Caused by Severe Thermomechanical Deformation during FSW

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