Elasto-Plastic Springback of Beams Subjected to Repeated Bending/Unbending Histories

Kosel, Franc; Videnic, T.; Kosel, Tadej; Brojan, Miha

doi:10.1007/s11665-010-9706-1

Cited by 24 publications

(11 citation statements)

References 22 publications

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“…The chemical composition of test sample of the high carbon chromium bearing steel is shown in Table 1 which reveals that its equivalent grade agrees with AISI -52100, GCr15 steel standard specification [2,6]. The samples are LG 15 and LG 25 series linear guide rail made of SAE 52100 were cut with the wheel cutting machine to get the desired length and used water spray cools the cutting tool cannot to change the original shape.…”

Section: Methodsmentioning

confidence: 74%

Research on the Precision Straightening Stroke of SAE 52100 Steel in Different Heat Treatments

Khaing¹,

Lü²

2014

AJME

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This research is aimed to analyze the microstructure and hardness properties of SAE 52100 steel straightening strokes based on experimental and theoretical investigation with different cross sectional shapes based on different heat treatment conditions. The heat treated samples are used for the design and manufacturing of straightening process. Through various experiments and simulations for the guide rail, we got the relationship between the loading stroke with different heat treatment and the loading stroke with cross section shape, and also the result of hardness testing curves and straightening stroke were discussed briefly. The quality and precision of straightness steel bar mainly depends on the results of hardness of heat treatment and microstructure of metal bar. Results put forward to the best method of selecting heat treatment methods and providing the theoretical basis for improving straightening precision and developing the optimal straightening process.

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Section: Methodsmentioning

confidence: 74%

Research on the Precision Straightening Stroke of SAE 52100 Steel in Different Heat Treatments

Khaing¹,

Lü²

2014

AJME

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“…In order to accurately calculate the elastic-plastic springback of the U-section beam, it was combined with the true stress-strain curve obtained from the uniaxial tensile test in the previous section; the elastic-power hardening model was used to establish the constitutive relationship of the material to describe the true stress-strain relationship [13]. Figure 3 shows the true stress-strain curve of TC4, which describes the stress-strain relationship of the material in uniaxial tensile tests.…”

Section: Material-hardening Modelmentioning

confidence: 99%

“…Johnson and Yu [11,12] determined the elastic springback in elastic work-hardening beams and plates under elastic-plastic pure bending and established a mathematical model for the final curvatures. Kosel et al [13] investigated a repeated elastic-plastic pure plane bending/unbending process of beams made of a material with an elastic-linear hardening rheological model. Attention was devoted to beams having cross-sections with at least one axis of symmetry and that are initially straight or have a constant radius of curvature.…”

Section: Introductionmentioning

confidence: 99%

Study on Springback Straightening after Bending of the U-Section of TC4 Material under High-Temperature Conditions

Jin

Yang

et al. 2020

Materials

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The thin-walled structures of titanium alloys have peculiar characteristics involving thin curved surfaces, complicated structures, and a poor rigidity. Therefore, bending or twisting distortion frequently occurs in forging, extrusion, drawing, transportation, cooling, and manufacturing. Straightening theory focuses on the straightening curvature or bending moment at room temperature, and a unified analytical model of the straightening curvature, the straightening bending moment, and the straightening stroke, as well as a study on springback straightening under high-temperature conditions, have not been investigated comprehensively. In order to understand the inherent mechanism of springback straightening and quantitative prediction of springback under high-temperature conditions, uniaxial tension tests were carried out to obtain the true stress–strain model of material and stress relaxation under the stress relaxation model. This paper is based on the theory of elastic-plastic mechanics and combines this with the mechanism of stress relaxation to establish springback and residual relative curvature equations of springback. The law of springback straightening is further explored, and springback and residual deflection equations are provided. The results of the study showed that the relative errors of the theoretical residual deflection of the bending deformation and residual deflections obtained by the experiment were less than 20%, with an average absolute error of less than 10%. Therefore, the hardening models adopted can achieve an allowable relative error if hardening parameters are properly selected. The proposed research provides basic data for the prediction of springback straightening, and the design of springback compensation tools can be applied in practical applications.

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“…In metal forming, the designed shape of the workpiece may not be obtained because of springback [6], [7], [8]. Therefore, design iteration is required.…”

Section: Motivation For This Workmentioning

confidence: 99%

On Development of Methods for Expressing Customer Affective Response for Apparel Products

Zhao¹,

Montazer²,

Wang³

et al. 2015

Proceedings of CAD'15

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In dimensional metrology, contact and non-contact measurement methods each have their own respective strengths and weaknesses. Touch-trigger probes have low uncertainty, and perform well inside deep holes, but have a relatively slow data acquisition speed. By contrast, non-contact digitizers collect high density surface point clouds in seconds, and are much less likely to suffer from sensor collision with the part, but have a higher uncertainty than touch probes. In sheet metal forming, iterative design of the stamping die is needed due to the springback of the sheet metal part. Holes or other features of first article parts may be significantly out of tolerance, so the tactile measurement path created from the Computer Aided Design (CAD) nominal has to be adjusted to avoid cosine error. In more serious cases, probe collisions or missed touches may occur. When measuring holes in thin sheet metal, determination of the touch probe path height is also a challenge if the actual surface location differs from the nominal.To solve this problem and seize the complimentary advantages of contact and non-contact measurement methods, a multi-sensor blue Light Emitting Diode (LED) snapshot sensor and touch-trigger probe inspection system was developed, and affixed to a Coordinate Measuring Machine (CMM). The tactile measurement path was adjusted according to the approximate positions and sizes of the features obtained from the scanner iv data. The system includes an in-house designed calibration target for scanner calibration and a lightweight 2-axis rotary table for multiple-orientation scanning as well. Software in programming language C for interacting with the scanner and the CMM was developed.

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Elasto-Plastic Springback of Beams Subjected to Repeated Bending/Unbending Histories

Cited by 24 publications

References 22 publications

Research on the Precision Straightening Stroke of SAE 52100 Steel in Different Heat Treatments

Research on the Precision Straightening Stroke of SAE 52100 Steel in Different Heat Treatments

Study on Springback Straightening after Bending of the U-Section of TC4 Material under High-Temperature Conditions

On Development of Methods for Expressing Customer Affective Response for Apparel Products

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