To study the effect of stress magnitude and tool geometry on the calibration coefficients: Ring core technique
01 Dec 2018-Vol. 232, Iss: 6, pp 674-684
TL;DR: In this paper, a ring core technique is used to measure the subsurface residual stresses in component components, and the analytical evaluation of residual stresses by ring core is carried out.
Abstract: Ring core technique is widely used to measure the subsurface residual stresses in components. In the analytical evaluation of residual stresses by ring core technique, the calibration coefficients ...
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TL;DR: In this paper, a method was developed for determining residual stress based on displacement fields near drilled holes analyzed using 3D digital image correlation, which made it possible to determine the residual stress distribution over a wide range of hole depth-to-hole diameter ratios and various areas of displacement field measurements using inverse method iterative calculations.
2 citations
TL;DR: In this article , the recent progress of four typical surface strengthening methods is analyzed in detail, including MSP, USP, LSP and BSM, and various research methods and optimization strategies are also compared.
2 citations
06 Feb 2023-Proceedings Of The Institution Of Mechanical Engineers, Part E: Journal Of Process Mechanical Engineering
TL;DR: In this article , three BSK 46 weldments (weld-1, weld-2 and weld-3) were fabricated by varying the root gap, root face, filler pass and heat input.
Abstract: BSK 46 is a low alloy structural steel with excellent mechanical and corrosion properties and is widely used in many applications, including tipper bodies of heavy-duty trucks. Optimizing the welding parameters to reduce defects and improve productivity is critical for the users. The present work addresses optimizing the welding process parameters to improve productivity with adequate weld quality during the pulsed gas metal arc welding (P-GMAW) process. Three BSK 46 weldments (weld-1, weld-2 and weld-3) were fabricated by varying the root gap, root face, filler pass and heat input. The metallographic and mechanical characterization of P-GMAW weldments were done through microstructures, Vickers micro-hardness, transverse tensile strength, Charpy toughness and three-point bend test. Subsequently, a correlation has been developed between the microstructural features and mechanical properties of the weld joints. The hardness was found to be incremental in nature from the base metal to the fusion zone. Maximum hardness of 215.81 ± 10 HV was observed in the weld-3 fusion zone. Tensile test results reveal that weld-3 weldments exhibit a higher tensile strength of 547.48 ± 2 MPa than weld-1 (537.46 ± 7 MPa) and weld-2 (533.67 ± 9 MPa) weldments. Maximum impact toughness of 136.33 ± 14 J was observed in the weld-3 weldments. Post-bend testing showed no cracks on the weld surfaces, indicating defect-free weld joints with good ductility. It is observed that weld-3 showed relatively better mechanical properties than weld-1 and weld-2 in lesser welding time and lower welding cost
1 citations
References
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TL;DR: In this paper, the authors classify different residual stresses measurement methods and provide an overview of some of the recent advances in this area to help researchers on selecting their techniques depending on their application and the availabilities of those techniques.
633 citations
TL;DR: In this article, the plasticity and stress concentration effects of blind hole drilling technique on the calculation of residual stresses for SS 304L and modified Cr-Mo Grade 91 alloys were investigated experimentally through tensile testing and for biaxial loading through numerical modeling.
39 citations
"To study the effect of stress magni..." refers background in this paper
...The stresses (ra, rb, and rc) in the grid directions a, b, and c of strain rosette can be described by equations (1) to (3)....
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TL;DR: In this article, a ring-core method/three-dimensional digital image correlation (3D DIC) residual stresses measurement is proposed to determine residual stress and rigid-body motion.
Abstract: Ring-core method/three-dimensional digital image correlation (3D DIC) residual stresses measurement is proposed. Ring-core cutting is a mechanical stress relief method, and combining with 3D DIC system the deformation of the specimen surface can be measured. An optimization iteration method is proposed to obtain the residual stress and rigid-body motion. The method has the ability to cut an annular trench at a different location out of the field of view. A compression test is carried out to demonstrate how residual stress is determined by using 3D DIC system and outfield measurement. The results determined by the approach are in good agreement with the theoretical value. Ring-core/3D DIC has shown its robustness to determine residual stress and can be extended to application in the engineering field.
31 citations
TL;DR: In this article, a 3D finite element (FE) model was used to calculate the residual stress field data at different stress ratios at various depths of the welded joints and this data were used to develop the regression equations as well as to determine the calibration coefficients.
30 citations
"To study the effect of stress magni..." refers background or methods in this paper
...regression equations (11) to (14) can be fairly used to evaluate the residual stresses....
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...From the developed regression equations (11) to (14), the residual stresses can be calculated directly from the experimental strain readings obtained during dry ring coring for the tool geometries OD/ID 30/22mm and OD/ID 24/16mm....
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...Respective error in stresses has also been estimated between the applied stresses and the stresses obtained from the mathematical relations as shown in equations (11) to (14)....
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...The developed mathematical relations are depicted as equations (11) to (14) in which equations (11) and (12) represent the ring core geometry OD/ID 30/22mm and equations (13) and (14) represent the ring core geometry OD/ID 24/16mm....
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TL;DR: In this article, the influence of different specimen dimensions on the accuracy of the evaluated residual stresses is considered and the coefficients are used for residual stress evaluation by incremental method used in Ring-Core method.
Abstract: There are several measuring techniques for determining residual stress which can be divided according to the created damage in to the construction in non-destructive, semi-destructive and destructive ones. One of the most common is semi-destructive hole-drilling method. This paper deals about Ring-Core method which is based on the similar principles. Today, there is no standard for the Ring-Core method, thus it is important to consider various influential factors. One of them are the dimensions of specimen. Calibration coefficients are determined by finite element (FE) analysis using the commercial software Solidworks. These coefficients are used for residual stress evaluation by incremental method used in Ring-Core method. The influence of different specimen dimensions on the accuracy of the evaluated residual stresses is considered.
21 citations
"To study the effect of stress magni..." refers background in this paper
...The developed mathematical relations are depicted as equations (11) to (14) in which equations (11) and (12) represent the ring core geometry OD/ID 30/22mm and equations (13) and (14) represent the ring core geometry OD/ID 24/16mm....
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