Abrasive Waterjet Peening With Elastic Prestress: Subsurface Residual Stress Distribution

Sadasivam, Balaji; Hızal, Alpay; Arola, D.

doi:10.1115/imece2007-43473

Cited by 5 publications

(5 citation statements)

References 6 publications

(8 reference statements)

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“…Остаточные напряжения первого рода (ОН) существенно влияют на долговечность изделия. Несмотря на высокую эффективность современных методов моделирования, сохраняется необходимость экспериментального измерения остаточных напряжений (деформаций) [1][2][3][4][5][6][7][8][9][10][11][12][13]. Однако большинство механических методов определения ОН являются разрушающими и имеют высокую погрешность (до 40-50%).…”

Section: Introductionunclassified

Method for processing experimental data when investigating residual stresses by drilling probe holes and digital image correlation

Makhalov,

Krechetov,

Blumenstein

et al. 2023

jour

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This paper investigates the cutting forces arising when using a single abrasive grain. Analytical studies were carried out using a model of a single abrasive grain in the form of a rod with a radiused apex acting on the workpiece material. The slip-line method (method of characteristics) was used to calculate the deformation intensity of a plastically edged workpiece material under the action of a single grain. Mathematical models were developed for the following factors: plastic deformation of the material, edging of the stagnated zone and its friction against the grain surface when moved upwards in the form of chippings, grain friction against the plastically deformed material, and the action of the dynamic component of plastic deformation. The significance of the dynamic component in the overall balance of forces related to plastic deformation was established by determining the ratio of dynamic stress on the break line and shear yield point. This dependence calculated for D16T and 30HGSA materials showed the feasibility of accounting for the dynamic component subsequently processed by free orthogonal cutting and rolling contact deformation using a special machine with numerical control. Further, using the same machine, drilling of probing holes was performed with video recording of the surface image prior to and following drilling. By varying the speckle images, the displacements of material particles on the sample surface were determined by the digital image correlation method, following which the radial deformations were determined by differentiating the obtained displacement values. Statistical analysis of a sample of radial deformations equidistant from the centre of the hole while varying the rotation angle by Fourier transformation with the calculation of the distribution period showed that the distribution is periodic. It is established that the periodograms constructed using experimental data have local maxima at a period value close to 180 degrees. This determines that the main calculated components of the residual stresses and the angle of their rotation be constant when selected to calculate the values of radial deformations at arbitrary points around the hole. The paper presents an approach that allows residual stresses to be determined by drilling probing holes and assessing the displacement of material particles on the sample surface due to the redistribution of residual stresses. For the analytical description of experimental data, it is proposed that an approximating periodic function be used, and the physical meaning of its coefﬁcients is determined.

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Section: Introductionunclassified

Method for processing experimental data when investigating residual stresses by drilling probe holes and digital image correlation

Makhalov,

Krechetov,

Blumenstein

et al. 2023

jour

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“…Due to the complex physical nature the residual stresses simulation and calculations are difficult. The residual stress is researched by experimental methods [4], including strain gauges methods [5], strain evaluation during residual stresses relaxation [6], the material hardened layers layer-by-layer chemical removal with the occurring strain estimation [4], X-ray diffraction [7] and microindentation [8] etc.…”

Section: Introductionmentioning

confidence: 99%

The Residual Stress Modeling in Surface Plastic Deformation Machining Processes with the Metal Hardening Effect Consideration

Makhalov

Blumenstein

2022

SSP

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The metal workpiece Surface Layer (SL) Residual Stresses (RS) modeling and computational algorithms creation relevance is shown. The RS forming discrete elastoplastic finite element model at Surface Plastic Deformation (SPD) hardening treatment, including technological inheritance effect, is presented. A model feature is the complex non-monotonic types of metal loading and subsequent unloading and hardened body effect consideration, as well as residual stress tensor components evaluation as a result of these effects. Residual stress tensor components calculations in the workpiece hardened surface layer after treatment with different routines are performed. The metal hardening effect on the residual stresses values and distribution is established. The correlations between the residual stress tensor components and the main treatment routine parameters - the roller tension and profile radius are established.

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“…The surface residual stress ranged from 680 to 1487 MPa for Ti6Al4V and 720 to 1554 MPa for ASTM A228 steel; the depth ranged from 265 to 370 μm for Ti6Al4V and 550 to 680 μm for ASTM A228 steel. Results showed that elastic prestress may be used to increase the surface residual stress in AWJ peened components by up to 100 % [5].…”

Section: Introductionmentioning

confidence: 99%

“…Most researchers agree that it is important to measure, evaluate, predict and control their magnitude and distribution of residual stresses. Residual stresses are investigated by experimental methods, including tensometry [2], evaluation of deformations in the relaxation of residual stresses [5], by layer-by-layer chemical removal of hardened material layers with an estimation of the emerging deformation [5], X-ray diffraction [7], microindentation [8] and others.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Calculation of Residual Stresses in Mining Machines Components

2018

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Technologies of surface plastic deformation (SPD) provide a hardening effect and create compressive residual stresses in the surface layer of mining machine parts. This leads to a significant increase in the limit of endurance and fatigue cyclic life, increases the life in fretting conditions, improves the quality of assembly joints fit, etc. Very complex are both the physical nature of the occurrence and the estimation of residual stresses, since the machining processes are related to complex nonmonotonic types of loading. The study shows the relevance of the development of computational methods for determining residual stresses in the processes of hardening treatment of critical surfaces of mining machine parts. At the same time, the design and development of experimental nondestructive express methods based on the determination of various physical parameters (acoustic, magnetic noise, coercive force, etc.) are relevant and promising. A model of the process is developed and numerical calculations of the residual stresses arising during the SPD treatment are carried out. The results of the calculations are in good agreement with the experimental data.

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Abrasive Waterjet Peening With Elastic Prestress: Subsurface Residual Stress Distribution

Cited by 5 publications

References 6 publications

Method for processing experimental data when investigating residual stresses by drilling probe holes and digital image correlation

Method for processing experimental data when investigating residual stresses by drilling probe holes and digital image correlation

The Residual Stress Modeling in Surface Plastic Deformation Machining Processes with the Metal Hardening Effect Consideration

Simulation and Calculation of Residual Stresses in Mining Machines Components

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