Residual Stresses in Elastoplastic Bending of Round Bar

Shinkin, V. N.

doi:10.4028/www.scientific.net/msf.946.862

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…In the basis for determining the residual stresses after the plastic deformation is laid the Genki's theorem about unloading (1924) [14][15][16]23]: the residual stresses are equal to the difference between the true stresses in the elastoplastic body and those stresses that would be created in it under the assumption of the ideal elasticity of the body's material.…”

Section: Residual Stresses Of Round Rod After Spring-backingmentioning

confidence: 99%

Residual Stresses of Round Steel Rod at Elastoplastic Twisting

Shinkin

2020

MSF

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In the elastoplastic twisting of a rod under the action of an external torque, the cross-section of the rod is divided into two zones: the inner elastic zone and the outer plastic zone. After removing the external loads, we observe the residual deformations and the residual stresses inside the rod that significantly affect on the subsequent mechanical processes at manufacturing the products from the round rod. Under too much twisting, the longitudinal surface fibers of the rod begin to tear, the outer surface of the rod ceases to be cylindrical, and the rod’s cross-section ceases to be flat (the Bernoulli’s hypothesis about the flat sections is violated). Next a rupture of the rod is followed. For the plastic materials, the destruction is caused by the pure shear, and the rupture surface is perpendicular to the axis of the rod. For the brittle materials, the destruction occurs, due to the rupture along the screw surface inclined to the axis of the round rod at the angle of 45. In this paper, the residual stresses of the round rod at twisting are obtained for an elastoplastic medium with linear hardening in depending on the rod’s diameter, the shear modulus, the hardening modulus in shear and the yield strength in shear of the rod’s material.

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Section: Residual Stresses Of Round Rod After Spring-backingmentioning

confidence: 99%

Residual Stresses of Round Steel Rod at Elastoplastic Twisting

Shinkin

2020

MSF

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“…The purpose of this work is to reveal the mechanical characteristics of the surface of a two-layer composite as well as to develop new method of mechanical testing [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Viscosity of Microdestruction of Multilayer Composite and Method of its Revealing

Ushakov

Oshorov

2022

MSF

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A technique for creating multilayer composites has been developed. Mechanical properties of two-layer composites without carbon nanotubes and with carbon nanotubes were carried out by the method of local loading. The dependences of microhardness on the magnitude of the load and the depth of indentation were determined. An equation for determining the coefficient of microdestruction viscosity for two-layer composite material has been developed.

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“…1-3) . Let h and b be the thickness and width of steel sheet; E, Py, σy and σu be the Young's modulus, the hardening modulus, the yield strength and the ultimate strength of steel [1][2][3][4][5][6][7]. Let εy = σy/E is the relative elongation in the yield strength, εu is the relative elongation in the ultimate strength (at the moment of neck's formation) [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Bauschinger Effect, Masing Principle and Hencky Theorem for Bending Moment at Repeated Alternating-Sign Bending of Steel Sheet

Shinkin

2022

MSF

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In the production of the large-diameter thick-walled steel pipes (with a diameter of 1020-1420 mm and with a wall thickness of up to 32-48 mm from the high-strength steels of the strength class K50-K65) under the SMS Meer technology for the main gas-and-oil pipelines, the steel sheet is bent several times sequentially during the technological transitions from one press to another. At the elastoplastic alternating-sign bends of the sheet, the yield strength of the bending moment of the sheet changes from one bend to another, which causes great difficulties for the metallurgical technologists when they calculate the curvature of the tube’s wall and the final diameter of the pipe. To solve this problem, we propose the new analytical method for calculating the bending moment and curvature of a steel sheet under the low-cycle alternating-sign bending.

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Residual Stresses in Elastoplastic Bending of Round Bar

Cited by 4 publications

References 23 publications

Residual Stresses of Round Steel Rod at Elastoplastic Twisting

Residual Stresses of Round Steel Rod at Elastoplastic Twisting

Viscosity of Microdestruction of Multilayer Composite and Method of its Revealing

Bauschinger Effect, Masing Principle and Hencky Theorem for Bending Moment at Repeated Alternating-Sign Bending of Steel Sheet

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