Investigation on deformation of single-sided stringer parts based on fluctuant initial residual stress

Yang, Yan; Li, Xiaoyue; Li, Liang; He, Ning; Zhao, Guolong; Chen, Ni; Lan, Hui; Zhou, Zaowen

doi:10.1016/j.jmatprotec.2019.04.031

Cited by 18 publications

(11 citation statements)

References 23 publications

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“…When analyzing the bending distortion of a long beam, the beam is fixed for one section and the other end is hinged. Furthermore, the part can be simplified into a simply supported beam, and the maximum deflection value of the bending distortion is used to characterize the distortion [5,19,20]. Based on the calculation formula of bending distortion in the literature [2], the predicted bending distortion of the final part (PV final ) can be calculated as follows.…”

Section: The Part Geometrymentioning

confidence: 99%

“…The advantage of this parameter is that it reveals the essential cause of part distortion. The bending strain energy (E bent ) and the total strain energy inside the blank (E elastic ) can be calculated by Equations (4) and (5).…”

Section: The Part Geometrymentioning

confidence: 99%

“…For all the possible combinations of the four parts and four blanks, the distortion and energy were calculated. The part distortion was calculated by Equation 3, and the corresponding strain energy was calculated by Equations (4) and (5). To characterize the relationship between bending strain energy and part distortion, the bending strain energy was plotted as a function of part distortion in Figure 10.…”

Section: The Relationship Between Bending Energy and Final Distortionmentioning

confidence: 99%

“…Results showed that the final machining distortion is basically determined by the residual stress within a certain thickness under the blank surface. Yang et al [5] studied the influence of fluctuant initial residual stress on machining distortion by theoretical analysis, FEM simulation and experimental study. The results denote that the initial residual stress fluctuation has a significant effect on machining deformation.…”

Section: Introductionmentioning

confidence: 99%

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Machining Distortion Minimization of Monolithic Aircraft Parts Based on the Energy Principle

Fan

Tian

et al. 2020

Metals

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Machining distortion is a recurring problem in the machining of monolithic aircraft parts. This paper aims to study the machining distortion minimization of monolithic aircraft parts. Firstly, the energy principle of machining distortion was analyzed. Then, a rapid prediction model of the final part distortion for beam parts was proposed based on the equivalent stress, and the initial bending strain energy contained in the final part was used to characterize the bending distortion risk of the final part. Numerical simulation and milling experiments verified the effectiveness of the proposed prediction model. The relative error between the experimental and calculated results does not exceed 26.5%. Finally, the influence of initial residual stress fluctuation, part geometry and the part location on part distortion was analyzed from the energy point of view. The obtained results indicated that the expected final part distortion can be minimized by adjusting these three factors.

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Section: The Part Geometrymentioning

confidence: 99%

Section: The Part Geometrymentioning

confidence: 99%

Section: The Relationship Between Bending Energy and Final Distortionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Machining Distortion Minimization of Monolithic Aircraft Parts Based on the Energy Principle

Fan

Tian

et al. 2020

Metals

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“…These facts, together with the variability of BIRS due to subtle deviations on composition or on the upstream thermomechanical processing of workpiece material supply, make it unfeasible to anticipate the actual BIRS of the part. Hence, Yang et al [15] analyzed the fluctuations of Al 7050-T4751 BIRS amplitude and its effects on the distortion of single-sided stringer parts. Hence, defining machining processes that would yield a minimum or acceptable part distortion is a challenging task.…”

Section: Introductionmentioning

confidence: 99%

Machining Stresses and Initial Geometry on Bulk Residual Stresses Characterization by On-Machine Layer Removal

Aurrekoetxea

Lacalle²,

Llanos

2020

Materials

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Prediction and control of machining distortion is a primary concern when manufacturing monolithic components due to the high scrap and rework costs involved. Bulk residual stresses, which vary from blank to blank, are a major factor of machining distortion. Thus, a bulk stress characterization is essential to reduce manufacturing costs linked to machining distortion. This paper proposes a method for bulk stress characterization on aluminium machining blanks, suitable for industrial application given its low requirements on equipment, labour expertise, and computation time. The method couples the effects of bulk residual stresses, machining stresses resulting from cutting loads on the surface and raw geometry of the blanks, and presents no size limitations. Experimental results confirm the capability of the proposed method to measure bulk residual stresses effectively and its practicality for industrial implementation.

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Control of machining distortion stability in machining of monolithic aircraft parts

Fan

Yang

et al. 2021

Int J Adv Manuf Technol

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Investigation on deformation of single-sided stringer parts based on fluctuant initial residual stress

Cited by 18 publications

References 23 publications

Machining Distortion Minimization of Monolithic Aircraft Parts Based on the Energy Principle

Machining Distortion Minimization of Monolithic Aircraft Parts Based on the Energy Principle

Machining Stresses and Initial Geometry on Bulk Residual Stresses Characterization by On-Machine Layer Removal

Control of machining distortion stability in machining of monolithic aircraft parts

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