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< Page ,Total 51 >
A Study on Bearing Dynamic Features under the Condition of Multiball-Cage Collision SCIE Scopus
期刊论文 | 2022 , 10 (1) | LUBRICANTS
WoS CC Cited Count: 15 SCOPUS Cited Count: 37
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Abstract :

Cage stability directly affects the dynamic performance of rolling bearing, which, in turn, affects the operating state of rotating equipment. The random collision between the rolling elements and the cage pocket is the main reason for cage instability. In this paper, from the perspective of the relative sliding velocity between the rolling elements and the bearing raceway, the interactions of the rolling elements and the cage pockets were analyzed, and the four zones with different collision features were defined. On this basis, and on the basis of the bearing dynamics model, the interaction of two adjacent rolling elements and the cage pockets in the a'-b' area is discussed, and the peak impact force of the adjacent two balls and the cage pockets was investigated in terms of the rotation speed, radial load, acceleration/deceleration, and materials. When the ball runs close to the loaded zone, the probability of multiball random collision increases, which leads to an increase in the cage instability. At the entrance of the loaded zone, the peak impact force has the greatest impact on the cage stability during the acceleration process. Compared to the radial load applied to the bearing, the peak impact force is more sensitive to the bearing speed changes. The multiball collision analysis method provides a new idea for the research of cage stability.

Keyword :

bearing dynamic model cage instability multiball random collision peak impact force

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GB/T 7714 Ma, Shuaijun , Zhang, Xiaohong , Yan, Ke et al. A Study on Bearing Dynamic Features under the Condition of Multiball-Cage Collision [J]. | LUBRICANTS , 2022 , 10 (1) .
MLA Ma, Shuaijun et al. "A Study on Bearing Dynamic Features under the Condition of Multiball-Cage Collision" . | LUBRICANTS 10 . 1 (2022) .
APA Ma, Shuaijun , Zhang, Xiaohong , Yan, Ke , Zhu, Yongsheng , Hong, Jun . A Study on Bearing Dynamic Features under the Condition of Multiball-Cage Collision . | LUBRICANTS , 2022 , 10 (1) .
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Dynamic Performance Analysis of Cage in Four-Point Contact Ball Bearing SCIE Scopus
期刊论文 | 2022 , 10 (7) | LUBRICANTS
SCOPUS Cited Count: 3
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Abstract :

Due to the special structure of double-half inner rings, four-point contact ball bearings are prone to uneven forces in the inner raceway during movement, which affects the dynamic performance of the rolling element and cage, and even leads to cage sliding. Dynamic performance of the cage is an important factor affecting the working stability of bearings. In this paper, in order to grasp the operation law of the cage so as to guide the application of four-point contact ball bearings, the dynamic model of four-point contact ball bearings is established by the secondary development of Automatic Dynamic Analysis of Mechanical Systems (ADAMS). The dynamic performance of the cage is analyzed and evaluated with the indexes of vortex radius ratio and vortex velocity deviation ratio of the cage centroid trajectory. The results show the following: the cage stability increases and then decreases to a certain degree with rotating speed-rise; it increases and then decreases with the increase in the pure axial load; under a combination of axial and radial load, the cage moves more smoothly with smaller radial force. Rotating speed has little effect on cage stability, while radial force has a great influence on cage stability, followed by axial load. In order to verify the simulation results, a test bench for rolling bearing cages is developed, and the accuracy of the simulation results is verified by the test results.

Keyword :

bearing dynamics cage motions experiment four-point contact ball bearing load distribution

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GB/T 7714 Li, Yeteng , Li, Wenchao , Zhu, Yongsheng et al. Dynamic Performance Analysis of Cage in Four-Point Contact Ball Bearing [J]. | LUBRICANTS , 2022 , 10 (7) .
MLA Li, Yeteng et al. "Dynamic Performance Analysis of Cage in Four-Point Contact Ball Bearing" . | LUBRICANTS 10 . 7 (2022) .
APA Li, Yeteng , Li, Wenchao , Zhu, Yongsheng , He, Gaobo , Ma, Shuaijun , Hong, Jun . Dynamic Performance Analysis of Cage in Four-Point Contact Ball Bearing . | LUBRICANTS , 2022 , 10 (7) .
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Research on Performance Enhancement of Quantum Dot Sensors for Temperature Monitoring of Rotating Components EI
期刊论文 | 2021 , 57 (14) , 188-194 | Journal of Mechanical Engineering
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Abstract :

All-inorganic cesium lead halide perovskite (CsPbBr3) quantum dots have shown great potential in the field of fluorescence temperature sensors due to their excellent optical properties. Focusing on the non-uniform fluorescence of CsPbBr3 quantum dots caused by uncontrollable in-situ crystallization strategy which is revolved around the temperature monitoring problem of bearing rotating components (bearing inner ring, bearing cage, et al) under high oil pollution and strong interference environment, a preparation-optimization method of CsPbBr3 quantum dots coated with polyvinylidene difluoride (PVDF), whose effectiveness is verified by means of microscopic morphology characterization, is proposed based on electrospinning technology and orthogonal experiment method, What's more, silicone resin (SR) coating process is used to improve the thermal stability of the perovskite quantum dot sensor. Finally, through temperature monitoring experiment of the bearing cage, it is demonstrated that the temperature monitoring performance of perovskite quantum dot sensor can be effectively enhanced by using electrospinning technology combined with SR coating process. © 2021 Journal of Mechanical Engineering.

Keyword :

Bromine compounds Cesium compounds Coatings Electrospinning Fluorescence Lead compounds Nanocrystals Optical properties Perovskite Semiconductor quantum dots Silicones Thermodynamic stability

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GB/T 7714 Liang, Panting , Zhang, Pan , Yan, Ke et al. Research on Performance Enhancement of Quantum Dot Sensors for Temperature Monitoring of Rotating Components [J]. | Journal of Mechanical Engineering , 2021 , 57 (14) : 188-194 .
MLA Liang, Panting et al. "Research on Performance Enhancement of Quantum Dot Sensors for Temperature Monitoring of Rotating Components" . | Journal of Mechanical Engineering 57 . 14 (2021) : 188-194 .
APA Liang, Panting , Zhang, Pan , Yan, Ke , Hong, Jun , Zhu, Yongsheng . Research on Performance Enhancement of Quantum Dot Sensors for Temperature Monitoring of Rotating Components . | Journal of Mechanical Engineering , 2021 , 57 (14) , 188-194 .
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Flow Mechanism Characterization of Porous Oil-Containing Material Base on Micro-Scale Pore Modeling SCIE PubMed
期刊论文 | 2021 , 14 (14) | MATERIALS
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Abstract :

The self-lubricating effect of the porous oil-containing cage is realized by storing and releasing lubricants through its internal micro-scale pore structure. The internal flow and heat transfer process in the micron-submicron pore structure is crucial to the self-lubricating mechanism of the porous oil-containing cage. To this end, a new modeling method of porous cage was proposed based on random seeds theory, and the local two-dimensional models of porous cage with different micro-scale pore structure were established. The multiphysics coupling simulation analysis of lubricating oil inside the porous cage with the effect of centrifugal force and thermal expansion was carried out based on the COMSOL Multiphysics platform. In order to characterize the micro-scale pore structure, new structural parameter indicators, such as relative surface perimeter, effective porosity, tortuosity and fluid properties related to the internal flow process, were all extracted from the above models. Combing with the Hagen-Poiseuille equation, a flow resistance model of oil flow inside the porous oil-containing cage was obtained. Finally, comparison of simulation results and analytical solutions of the micro-scale resistance model was carried out to verify the correctness of the micro-scale resistance model. The work provides a new direction for the study of the lubrication mechanism of the porous oil-containing cage.

Keyword :

flow mechanism characterization micro-scale pores modeling micro-scale resistance model porous oil-containing cage rand seeds theory

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GB/T 7714 Yan, Ke , Yin, Tingting , Sun, Jiannan et al. Flow Mechanism Characterization of Porous Oil-Containing Material Base on Micro-Scale Pore Modeling [J]. | MATERIALS , 2021 , 14 (14) .
MLA Yan, Ke et al. "Flow Mechanism Characterization of Porous Oil-Containing Material Base on Micro-Scale Pore Modeling" . | MATERIALS 14 . 14 (2021) .
APA Yan, Ke , Yin, Tingting , Sun, Jiannan , Hong, Jun , Zhu, Yongsheng . Flow Mechanism Characterization of Porous Oil-Containing Material Base on Micro-Scale Pore Modeling . | MATERIALS , 2021 , 14 (14) .
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Analysis of the heat transfer performance inside cavity of the counter rotating dual rotor bearing EI SCIE
期刊论文 | 2021 , 73 (6) , 954-960 | INDUSTRIAL LUBRICATION AND TRIBOLOGY
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Abstract :

Purpose This paper aims to analyze the temperature field and the heat transfer performance of the counter rotating dual rotor bearings (CRDRB) based on the air phase flow field at different speeds to provide effective support for the lubrication and the thermal design of CRDRB. Design/methodology/approach In this study, taking H7006C angular contact ball bearing as an example, based on the flow visualization technique and the thermal analysis methods, the effects of outer ring speed on the air phase flow field, the temperature field and the heat transfer in bearing cavity were investigated. Findings Results indicated that there were more complex turbulent air vortices in CRDRB cavity. Turbulent cyclones in critical contact zone reduced the heat dissipation capacity of air. Compared with single rotor bearing with a static outer ring, the average heat transfer coefficient reduced by 11.78% and the average temperature raised by 3.06 K inside CRDRB cavity. Under the influence of outer ring rotation, the high temperature area in ball-inner raceway contact zone and pocket raised and reduced by 160.13% and 30.48%, respectively. The outer ring rotation had opposite effect on the heat dissipation of raceway contact zone and pocket. Originality/value The air phase flow field characteristics and the heat transfer performance of CRDRB were revealed and analyzed from the mechanism. An area quantification method was presented as an auxiliary mean of the thermal analysis to evaluate the heat transfer performance of bearing.

Keyword :

Air phase flow characteristics Area quantification method Heat transfer performance High-speed ball bearing Temperature field

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GB/T 7714 Chen, Fei , Wang, Chao , Yan, Ke et al. Analysis of the heat transfer performance inside cavity of the counter rotating dual rotor bearing [J]. | INDUSTRIAL LUBRICATION AND TRIBOLOGY , 2021 , 73 (6) : 954-960 .
MLA Chen, Fei et al. "Analysis of the heat transfer performance inside cavity of the counter rotating dual rotor bearing" . | INDUSTRIAL LUBRICATION AND TRIBOLOGY 73 . 6 (2021) : 954-960 .
APA Chen, Fei , Wang, Chao , Yan, Ke , Ghouri, Muhammad Azeem , Zhu, Yongsheng , Hong, Jun . Analysis of the heat transfer performance inside cavity of the counter rotating dual rotor bearing . | INDUSTRIAL LUBRICATION AND TRIBOLOGY , 2021 , 73 (6) , 954-960 .
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Negative Poisson's Ratio-Spacer Design and Its Thermo-Mechanical Coupling Analysis Considering Specific Force Output SCIE PubMed
期刊论文 | 2021 , 14 (12) | MATERIALS
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Abstract :

Aiming at the problems of a complex structure or poor controllability of the existing bearing preload control devices, a method of self-regulation via a negative Poisson's ratio (NPR) spacer is proposed. Firstly, the principle of preload automatic adjustment at the bearing operation was introduced and the NPRs with three types of cell structures were analyzed. Furthermore, a thermo-mechanical coupling analysis model of the NPR spacer was established and the deformation and force output characteristics of the NPR spacer were studied and experimentally verified. It is found that the concave hexagonal cell structure has the optimal deformation characteristics for bearing preload adjustment. When the temperature is considered, the absolute value of Poisson's ratio of the NPR spacer decreases as the speed increases and the elongation of the NPR spacer and the output forces are much larger than those without temperature consideration. With the increase in temperature or rotating speed, the axial elongation and output forces of the NPR spacer increases while the effect of temperature is relatively larger.

Keyword :

low-porosity structure negative Poisson's ratio-spacer rolling bearing self-regulation of preload thermo-mechanical coupling

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GB/T 7714 Yuan, Qianqian , Zhu, Yongsheng , Yan, Ke et al. Negative Poisson's Ratio-Spacer Design and Its Thermo-Mechanical Coupling Analysis Considering Specific Force Output [J]. | MATERIALS , 2021 , 14 (12) .
MLA Yuan, Qianqian et al. "Negative Poisson's Ratio-Spacer Design and Its Thermo-Mechanical Coupling Analysis Considering Specific Force Output" . | MATERIALS 14 . 12 (2021) .
APA Yuan, Qianqian , Zhu, Yongsheng , Yan, Ke , Cai, Yiqing , Hong, Jun . Negative Poisson's Ratio-Spacer Design and Its Thermo-Mechanical Coupling Analysis Considering Specific Force Output . | MATERIALS , 2021 , 14 (12) .
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Experimental and theoretical results of the performance of controllable clearance squeeze film damper on reducing the critical amplitude EI SCIE Scopus
期刊论文 | 2021 , 166 | Tribology International
SCOPUS Cited Count: 6
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Abstract :

Aiming at the non-optimal performance of SFD under different operating conditions, this paper proposes a controllable clearance squeeze film damper (CCSFD) that uses hydraulic pressure to adjust the radial clearance and establishes a corresponding test rig. Measure the critical amplitude under different imbalances and hydraulic pressures. Give the calculation formula of hydrodynamic force by directly integrating pressure distribution and build the corresponding numerical model. Both experimental and numerical results show that CCSFD can achieve synchronous adjustment of the damper's performance under a non-stop state of the rotor system. In this case, the radial clearance can transform actively in the range of 1.75–3.19‰, which carries out a noticeable improvement of the damper's performance and achieves satisfactory performance under different operating conditions. © 2021

Keyword :

Damping Hydraulic fluids Lubrication Rotating machinery Shock absorbers Structural design

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GB/T 7714 Zheng, Wenbin , Pei, Shiyuan , Zhang, Qingshan et al. Experimental and theoretical results of the performance of controllable clearance squeeze film damper on reducing the critical amplitude [J]. | Tribology International , 2021 , 166 .
MLA Zheng, Wenbin et al. "Experimental and theoretical results of the performance of controllable clearance squeeze film damper on reducing the critical amplitude" . | Tribology International 166 (2021) .
APA Zheng, Wenbin , Pei, Shiyuan , Zhang, Qingshan , Hong, Jun . Experimental and theoretical results of the performance of controllable clearance squeeze film damper on reducing the critical amplitude . | Tribology International , 2021 , 166 .
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Research on Modeling Method of Porous Oil-containing Cage Based on Random Seeds EI
期刊论文 | 2021 , 57 (15) , 138-145 | Journal of Mechanical Engineering
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Abstract :

The self-lubricating effect of porous oil-containing cage is realized by storing and releasing the lubricating medium in the micro-pore structure. The geometric modelling of the micron and sub-micron pore structure of the cage is the premise of researching its multi-force-field action process and analysing its self-lubrication mechanism. Aiming at the problems of the current porous material modelling methods, such as large porosity and local distortion, a rapid digital modelling method for two-dimensional and three-dimensional structures of porous cages is proposed, based on the forming principle of the powder metallurgy process. According to the random seed method, the centre position and geometric size of particles are determined, and the sintering process of random stacking and squeezing of particles is simulated by using the stacking principle. In addition, a pseudo-random number generator is used to ensure the randomness of the multiple stacking processes of the particle centre position and size. Build on this, three-dimensional modelling, which is completed through the Rhino software, is compared and verified with the actual structure of the porous oil-containing cage. Finally, two-dimensional geometric modelling and multi-field coupling analysis of the porous cage are carried out by the COMSOL Multiphysics platform. The feasibility and correctness of the modelling method are verified via analysing the flow and heat transfer process inside the micropores, which provides new ideas for the analysis of three-dimensional structures of small-scale channels and small porosities. © 2021 Journal of Mechanical Engineering.

Keyword :

Geometry Heat transfer Lubrication Number theory Pore structure Porosity Powder metallurgy Random number generation Sintering

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GB/T 7714 Yin, Tingting , Sun, Xiaobo , Yan, Ke et al. Research on Modeling Method of Porous Oil-containing Cage Based on Random Seeds [J]. | Journal of Mechanical Engineering , 2021 , 57 (15) : 138-145 .
MLA Yin, Tingting et al. "Research on Modeling Method of Porous Oil-containing Cage Based on Random Seeds" . | Journal of Mechanical Engineering 57 . 15 (2021) : 138-145 .
APA Yin, Tingting , Sun, Xiaobo , Yan, Ke , Hong, Jun , Zhu, Yongsheng , Li, Yuanyuan . Research on Modeling Method of Porous Oil-containing Cage Based on Random Seeds . | Journal of Mechanical Engineering , 2021 , 57 (15) , 138-145 .
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Multilayer graphene and beta-Si3N4 whisker-reinforced porous Si3N4 ceramics by spark plasma incomplete sintering EI SCIE
期刊论文 | 2021 , 823 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
WoS CC Cited Count: 3
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Abstract :

Combining the advantages of spark plasma sintering (SPS) and incomplete sintering (IS) in preparation of Si3N4 ceramics, the spark plasma incomplete sintering (SPIS) was presented to fabricate porous Si3N4 ceramics. Considering balancing the contradictory relationship between the porosity and toughness, 1 wt% multilayer graphene (MLG) was incorporated into porous Si3N4 ceramics. Meanwhile, for the sake of compensating for the decrease in the hardness of porous Si3N4 ceramics induced by MLG, 0-8 wt% beta-Si3N4 whisker (beta-Si3N4w) were synergistically added. The element distribution, phase constitutions and microstructures of MLG/beta-Si3N4w-reinforced porous Si3N4 ceramics were characterized by energy dispersive spectroscopy (EDS), x-rays diffraction (XRD) and scanning electron microscope (SEM). The effects of beta-Si3N4w content on porosity, hardness and fracture toughness of porous Si3N4-based ceramics were analyzed. Results indicated that the porosity of porous Si3N4-based ceramics reached 21%, and then decreased significantly after the beta-Si3N4w content exceeded 4 wt%. The hardness of porous Si3N4-based ceramics obtained the maximum value 2.81 GPa when beta-Si3N4w was added 8 wt%, which was 31.92% higher than monolithic porous Si3N4 ceramic. The mass transfer, diffusion and fusion induced by beta-Si3N4w were considered to be the main responsible for the increase of hardness. The fracture toughness of specimen with 1 wt% MLG and 4 wt% beta-Si3N4w was advanced to 3.14 MPa m(1/2), which was 15.44% higher than monolithic porous Si3N4 ceramic. The markedly enhanced of the fracture toughness was attributed to the synergistic effects of crack deflection, pull-out and bridging resulted by MLG/beta-Si3N4w.

Keyword :

beta-Si3N4 whisker Fracture toughness Hardness Multilayer graphene Porosity Porous Si3N4 ceramics

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GB/T 7714 Chen, Fei , Yan, Ke , Zhou, Jianping et al. Multilayer graphene and beta-Si3N4 whisker-reinforced porous Si3N4 ceramics by spark plasma incomplete sintering [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2021 , 823 .
MLA Chen, Fei et al. "Multilayer graphene and beta-Si3N4 whisker-reinforced porous Si3N4 ceramics by spark plasma incomplete sintering" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 823 (2021) .
APA Chen, Fei , Yan, Ke , Zhou, Jianping , Zhu, Yongsheng , Hong, Jun . Multilayer graphene and beta-Si3N4 whisker-reinforced porous Si3N4 ceramics by spark plasma incomplete sintering . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2021 , 823 .
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A Method to Reduce the Number of Assembly Tightening Passes in Bolted Flange Joints SCIE
期刊论文 | 2021 , 143 (12) | JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
WoS CC Cited Count: 2
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Abstract :

Bolted flange joints are extensively used in pressure vessels and piping equipment and rotating machinery. Achieving a uniform bolt preload during the assembly process is particularly important to satisfy tightness in applications such as oil, gas, fossil, and nuclear industries. However, this task becomes very difficult due to the need of retightening the bolts because of elastic interaction and bolt cross talk. The risk of leakage failure under service loading is consequently increased because of the scatter of the bolt preload. This article presents an analytical model based on the theory of circular beams on the linear elastic foundation that simulates the elastic interaction present during the tightening of bolted flange joints to reduce the number of passes while achieving bolt load uniformity. As such, a novel methodology that optimizes tightening sequence strategies is suggested to obtain uniform bolt tension while avoiding yield under a minimum number of tightening passes. In this regard, based on the target preload, the load applied to each bolt in each pass is suggested. The developed approach is validated both numerically using finite element method and experimentally on a NPS 4 class 900 welding neck flange joint using the criss-cross tightening and sequential patterns.

Keyword :

advanced materials and processing analytical model assembly bolted flange joints elastic interaction modeling and simulation optimization analysis tightening sequence welding and joining

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GB/T 7714 Zhu, Linbo , Bouzid, Abdel-Hakim , Hong, Jun . A Method to Reduce the Number of Assembly Tightening Passes in Bolted Flange Joints [J]. | JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME , 2021 , 143 (12) .
MLA Zhu, Linbo et al. "A Method to Reduce the Number of Assembly Tightening Passes in Bolted Flange Joints" . | JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME 143 . 12 (2021) .
APA Zhu, Linbo , Bouzid, Abdel-Hakim , Hong, Jun . A Method to Reduce the Number of Assembly Tightening Passes in Bolted Flange Joints . | JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME , 2021 , 143 (12) .
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