Hybrid deflection prediction on machining thin-wall monolithic aerospace components

Izamshah, R.; Mo, John P.T.; Ding, Songlin

doi:10.1177/0954405411425443

Cited by 66 publications

(21 citation statements)

References 24 publications

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“…The proposed model is validated and the theoretical findings show very good agreement with the experimental results [1]. Although, experimental results are very often compared with FEM results [3,17], the problem of experimental signal analysis remains an open question. Different methods of signal analysis are applied in order to recognize chatter vibrations in cutting operations, including multifractal and wavelet approaches [38], multiscale entropy [23] HilbertHuang transform [20], recurrence analysis [22], flicker-noise spectroscopy [21] and audio signal analysis [32].…”

Section: Introductionmentioning

confidence: 64%

Dynamics of thin-walled element milling expressed by recurrence analysis

Rusinek

Zaleski

2015

Meccanica

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This paper presents the results of experimental research on the stability of a milling process for producing a thin-walled part made of AL7075 aluminium alloy. The part was machined on a CNC milling machine with a decreasing wall thickness. The acceleration and cutting forces in the process were measured and analyzed to determine stability limit using classical stability diagrams as well as recurrence plots and recurrence quantification analysis.

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Section: Introductionmentioning

confidence: 64%

Dynamics of thin-walled element milling expressed by recurrence analysis

Rusinek

Zaleski

2015

Meccanica

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“…The aviation monolithic components are in the possession of many advantages such as lower height, higher assembly quality, and higher structural efficiency. However, these components are large in size, complex in structure, and often thin-walled [1][2][3][4]. The thin-walled structures flexibly induce higher amplitude oscillations by any disturbance.…”

Section: Introductionmentioning

confidence: 99%

Simulations and Experiments on Vibration Control of Aerospace Thin-Walled Parts via Preload

Zhang

2017

Shock and Vibration

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Thin-walled parts primarily comprise the entire piece of rough machining, and the material removal rate can surpass 95%. Numerous components with thin-walled structures are preferred in the aerospace industry for their light weight, high strength, and other advantages. In aerospace thin-walled workpiece machining processes and practical applications, they are excited by the vibration. The preload changing the modal stiffness of the part is found and this change causes continuous changes in the natural frequency. Researching on the influence of pretightening force on dynamic characteristics of thin-walled components is highly significant for controlling vibration. In this study, the typical aviation thin-walled part is the research object. Finite element numerical simulation and experimental verification are employed to analyze the dynamic characteristics of 7075 aluminum alloy thin-walled plates under different preloads for exploring the relationship between natural frequency and preload. The relationship is validated by comparative results. Both the simulation and experimental results show that the natural frequencies of plates increase following the augmentation of the preload. Thus, this research introduces the method where vibration of aerospace thin-walled parts is reduced by preload. For practical engineering application, a program showing the relationship between natural frequency and preload is written using Visual Basic language.

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“…Because of their poor stiffness, thin-walled workpieces are very easy to deform under the acting of residual stresses in the blank and machining induced residual stress [1][2][3] . With the increasing trend of monolithic components for large size aircraft parts, quality control of a machined part is becoming increasingly critical for satisfying the demands of superior reliability.…”

Section: Introductionmentioning

confidence: 99%

Effects of milling process sequence on the residual stress related monolithic components deformation

Huang¹

2017

2017 2nd International Conference on Mechatronics and Information Technology (ICMIT 2017)

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Machining deformation of aircraft monolithic component is one of the most serious problems that the aircraft manufacturing industry had to face. The effects of milling process sequence on multi-frame monolithic components deformation are studied, and the inherent frequency of the multi-frame beam at different machining process is also investigated. Based on the analysis of milling process characters, some control stratagems could be developed to reduce the deformation of thin wall component due to residual stress in the blank. In order to study the effect of blank initial residual stress on components deformation, chemical milling is used to remove the machining induced residual stress on the machined surface of the components. The research results show that the initial residual stress in the blank is the main factor of deformation for 3-frame monolithic beam, and the coupling action of the initial residual stress and machining induced residual stresses aggravate the deformation.

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Hybrid deflection prediction on machining thin-wall monolithic aerospace components

Cited by 66 publications

References 24 publications

Dynamics of thin-walled element milling expressed by recurrence analysis

Dynamics of thin-walled element milling expressed by recurrence analysis

Simulations and Experiments on Vibration Control of Aerospace Thin-Walled Parts via Preload

Effects of milling process sequence on the residual stress related monolithic components deformation

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