Friction coefficient estimation in shaft/bush interference using finite element model updating

Seifi, Rahman; Abbasi, Kaveh

doi:10.1016/j.engfailanal.2015.08.006

Cited by 23 publications

(9 citation statements)

References 11 publications

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“…Тhe method of calculation of landings with tension is successfully used and improved for various connections, there is a refinement of each of the influencing parameters [9,10].…”

Section: Resultsmentioning

confidence: 99%

Calculation of fits for cylindrical connections with key for reducers in agricultural machinery

Erohin

Leonov

Kataev

et al. 2019

Engineering for Rural Development

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The lack of reliability of cylindrical connections with the key is explained not only by the low quality of the materials of the parts, but also by the inconsistency of the fit. The presence of a gap in these compounds leads to fretting and fretting corrosion due to the ingress of wear products, dust, moisture and soil. Increasing the gap leads to beatings and plastic deformations of surfaces. A method for calculating the fits with interference has been developed for cylindrical connections with a key. The method includes calculation of the pressure from the cantilever and radial forces in order to exclude the opening of the joint at low interference values and the transition to the zone of plastic deformation due to exceeding the maximum pressure at high interference. To ensure possible disassembly and assembly of the connection in the field the operational requirements for limiting the maximum interference were calculated to replace the drive elements, such as chains, sprockets, pulleys, belts, etc. Restrictions on the roughness of the hole and the shaft were introduced to ensure the quality of the contact area in the fit. Geometric parameters of keyways are introduced into calculations. The recommendations for thermal calculation of the dimensions of parts in the landing were improved. The dynamic coefficient, which takes into account the possible overload of connections, is included in the calculation of the minimum interference. As a result of testing the methodology, it was revealed that, when applying the obtained landings, the wear rate of the connection is significantly reduced. As an example of cylindrical connections with the key of reducers "Mosselmash", the wear rate of the sprocket-shaft connection with the use of the fit 30H7/x6 decreased by 12 times and the wear rate of the connection gear in the fit 40H9/z8 decreased by 3 times.

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“…Тhe method of calculation of landings with tension is successfully used and improved for various connections, there is a refinement of each of the influencing parameters [9,10].…”

Section: Resultsmentioning

confidence: 99%

Calculation of fits for cylindrical connections with key for reducers in agricultural machinery

Erohin

Leonov

Kataev

et al. 2019

Engineering for Rural Development

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“…1 Export total m samples and cut all samples with same start position by referring x mm ahead of the force activation threshold or reference zero position. 2 Adjust design validation data to production validation machine process data by using linear joining speed correlation factor based on FEM analysis (Seifi and Abbasi, 2015) or company knowledge. 3 Separate each sample sequential data into n small windows.…”

Section: Data Augmentation Methodsmentioning

confidence: 99%

“…Adjust design validation data to production validation machine process data by using linear joining speed correlation factor based on FEM analysis (Seifi and Abbasi, 2015) or company knowledge.…”

Section: Proposed New Methodsmentioning

confidence: 99%

“…It is common practice to use the thin wall model to calculate the joining force generated by the mating parts (Wang et al , 2019). Generally, fitting quality depends on various parameters such as the amount of overlaps, material property, physical dimension, geometrical design and friction coefficient of contacting surfaces (Seifi and Abbasi, 2015). Application of finite element methods (FEM) to simulate and investigate interference joints is also widely adopted (Teng et al , 2012; You et al , 2015).…”

Section: Introductionmentioning

confidence: 99%

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Press-fit process fault diagnosis using 1DCNN-LSTM method

2022

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Purpose Press-fit with force and displacement monitoring is commonly adopted in automotive mechatronic system assembling. However, suitable methods for the press-fit study are still at initial investigation phase. The sequential data physical meaning, small data sets from different resources and computing efficiency should be considered. Therefore, this paper aims to better identify press-fit fault types. Design/methodology/approach This paper proposed one-dimensional convolutional neural network (1DCNN)–long short-term memory (LSTM) method to perform press-fit fault diagnosis into automotive assembling practice which is in accordance with current product development procedure. Specialized data augmentation method is proposed to merge different data resources and increase the sample size. Referring one-way sequential data characteristics, LSTM and batch normalization layers are integrated in 1DCNN to improve the performance. Findings The proposed 1DCNN-LSTM method is feasible with small data sets from different sources. Using data augmentation to make data unified and sample size increased, the accuracy could reach more than 99%. Training time has reduced from 90 s/Epoch to 4 s/Epoch compare to pure LSTM method. Originality/value The proposed method shows better performance with less training time compared to LSTM. Therefore, the method has practical value and is worthy of industrial application.

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“…Yan et al [8] established the distribution rule of prestressing of the gear in the interference fit. Zhu [9] based on ANSYS, analyzed the relationship of the interference between the keyless joint and the maximum prestressing; Zhao et al [10] based on ANSYS, built the prestressed mode of the planetary gear train of the transmission; Wang [11] analyzed the influence of prestressing on interference fit of dump truck axle; Kim et al [12] simulated the hot assembly procedure of the external gear and axis in the interference fit, and predicted the amount of deformation of the teeth profiles, considering the shrink-fitting load and amount of expansion of the gear with major process variables, and the amount of shrink-fitting interference; Rahman et al [13] established the relationship between the friction coefficient and the stress of the contact area by studying the shaft and bushing of the interference joint; Hao et al [14] studied the contact stress of the interference fit of the planetary carrier based on the finite element method; and Frederic et al [15] obtained the reduction coefficient of the fretting fatigue strength of the interference joint. These studies have proposed effective calculation methods for the design of interference fit gear or similar joints.…”

Section: Introductionmentioning

confidence: 99%

Effects of Prestressing of the Ring Gear in Interference Fit on Flexural Fatigue Strength of Tooth Root

Yang

Xia

2019

Chin. J. Mech. Eng.

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When the gearbox body interference is connected to the ring gear, prestressing occurs in the ring gear, which has a significant impact on the strength and life of the gear. Research on the prestressing of the inner ring gear is in the preliminary stage, and the distribution rule of the prestressing and the influence of each parameter on the interference prestressing have not been derived. In this paper, based on the method of calculating the prestressing of the thick cylinder in interference fit, the ring gear is found to be equivalent to a thick cylinder, and the distribution rule of prestressing of the ring gear in the interference fit is inferred. Then, by modeling and analyzing the gearbox body and ring gear in the interference fit using ABAQUS, the distribution rule of prestressing the ring gear in the interference fit is obtained through a numerical simulation. Finally, the prestressing of the ring gear in the interference fit is measured using X-ray diffraction, and the distribution rule of prestressing of the ring gear in the interference fit is obtained through analysis. Compared with the distribution rule of prestressing in theory, numerical simulation, and experiment, the theoretical distribution rule of prestressing is amended through a statistical method, and a more accurate formula of prestressing is obtained. Through the calculation of the stress and bending moment in the dangerous section of the ring gear through prestressing, the formula for checking the tooth root flexural fatigue strength in the interference fit prestressing is inferred. This research proposes a tooth root bending strength conditional formula for the inner ring gear of the interference fit, which serves as a guide for the design and production of the actual interference joint inner ring gear.

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Friction coefficient estimation in shaft/bush interference using finite element model updating

Cited by 23 publications

References 11 publications

Calculation of fits for cylindrical connections with key for reducers in agricultural machinery

Calculation of fits for cylindrical connections with key for reducers in agricultural machinery

Press-fit process fault diagnosis using 1DCNN-LSTM method

Effects of Prestressing of the Ring Gear in Interference Fit on Flexural Fatigue Strength of Tooth Root

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