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学者姓名：初红艳
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Abstract ：
Flexspline frictional degradation causes failure of harmonic drives. This study focused on the improvement of the flexspline tribological properties. Flexspline material 40Cr was modified with a robust polydimethylsiloxane (PDMS) coating. Etched and chemically modified films were utilized to enhance the organic PDMS coating-substrate link strength. Comparing modified and unmodified 40Cr, the surface friction coefficient decreased by 82.2%. Moreover, the modified 40Cr exhibited excellent load-bearing properties. The effects of speed and lubricant-coating interaction on the tribological properties were verified. This study provides an essential theoretical basis for improving the tribological performance of harmonic drives via soft coating modification.
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| GB/T 7714 | Zhang, CaiXia , Xu, CaiXia , Liu, ZhiFeng et al. Formation of Robust Polydimethylsiloxane Coatings on the Flexspline Material and Mechanism of the Tribological Property Improvement [J]. | LANGMUIR , 2022 . |
| MLA | Zhang, CaiXia et al. "Formation of Robust Polydimethylsiloxane Coatings on the Flexspline Material and Mechanism of the Tribological Property Improvement" . | LANGMUIR (2022) . |
| APA | Zhang, CaiXia , Xu, CaiXia , Liu, ZhiFeng , Liu, MengMeng , Chu, HongYan , Zhang, KaiCheng . Formation of Robust Polydimethylsiloxane Coatings on the Flexspline Material and Mechanism of the Tribological Property Improvement . | LANGMUIR , 2022 . |
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Abstract ：
The combination of sliding/rolling motion can influence the degree of precision degradation of ball screw. Precision degradation modeling and factors analysis can reveal the evolution law of ball screw precision. This paper presents a precision degradation model for factors analysis influencing precision due to mixed sliding-rolling motion. The precision loss model was verified through the comparison of theoretical models and experimental tests. The precision degradation due to rolling motion between the ball and raceway accounted for 29.09% of the screw precision loss due to sliding motion. Additionally, the total precision degradation due to rolling motion accounted for 21.03% of the total sliding precision loss of the screw and nut, and 17.38% of the overall ball screw precision loss under mixed sliding-rolling motion. In addition, the effects of operating conditions and structural parameters on precision loss were analyzed. The sensitivity coefficients of factors influencing were used to quantitatively describe impact degree on precision degradation.
Keyword ：
mixed sliding-rolling motion mixed sliding-rolling motion sensitivity coefficients sensitivity coefficients Ball screw Ball screw factors influencing factors influencing precision degradation precision degradation
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| GB/T 7714 | Cheng, Qiang , Qi, Baobao , Chu, Hongyan et al. The analysis on the influence of mixed sliding-rolling motion mode to precision degradation of ball screw [J]. | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE , 2021 , 236 (1) : 669-688 . |
| MLA | Cheng, Qiang et al. "The analysis on the influence of mixed sliding-rolling motion mode to precision degradation of ball screw" . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE 236 . 1 (2021) : 669-688 . |
| APA | Cheng, Qiang , Qi, Baobao , Chu, Hongyan , Zhang, Ziling , Liu, Zhifeng , Zheng, Jigui . The analysis on the influence of mixed sliding-rolling motion mode to precision degradation of ball screw . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE , 2021 , 236 (1) , 669-688 . |
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Abstract ：
In actual engineering, material properties, load effects, and other factors of mechanical structures change due to long-term use. In order to understand the operation of a mechanical structure in real time, it is crucial to obtain the dynamic trajectory of its reliability. Considering the time variability of a mechanical structure over time, uncertain random variables are introduced to express the uncertainty of various parameters of structures, and the Wiener process is used to describe the strength degradation process of structures so as to solve the calculation problem of time-varying reliability of mechanical structures. Based on the advanced first-order and second moment method (AFOSM), the proposed linearized Nataf change is used to complete the transformation from related nonnormal variables to independent standard normal variables in order to simplify the calculation process of reliability solution and solve the reliability calculation problem of random parameters subjected to arbitrary distribution. The deduced random variable sensitivity factor indicates the degree of influence of different random variables on the reliability of the mechanical structure, providing a theoretical basis for the optimal design and maintenance of a mechanical structure. The proposed method is analyzed using the cantilever beam and compared with the nonlinear Nataf transform and verified by the Monte Carlo simulation results. The results show that the proposed method can effectively solve the reliability sensitivity problem of structural system strength degradation.
Keyword ：
sensitivity analysis sensitivity analysis linearized Nataf transformation linearized Nataf transformation order and second moment method order and second moment method advanced first‐ advanced first‐ reliability analysis reliability analysis strength degradation strength degradation
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| GB/T 7714 | Zhao, Yongsheng , Wang, Lixia , Wu, Hongchao et al. Time-varying reliability method based on linearized Nataf transform [J]. | QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL , 2021 , 37 (5) : 1922-1938 . |
| MLA | Zhao, Yongsheng et al. "Time-varying reliability method based on linearized Nataf transform" . | QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL 37 . 5 (2021) : 1922-1938 . |
| APA | Zhao, Yongsheng , Wang, Lixia , Wu, Hongchao , Chu, Hongyan , Yang, Congbin , Liu, Zhifeng . Time-varying reliability method based on linearized Nataf transform . | QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL , 2021 , 37 (5) , 1922-1938 . |
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Abstract ：
Green manufacturing is a growing trend, and an effective layout design method for production lines can reduce resource wastage in processing. This study focuses on existing problems such as low equipment utilization, long standby time, and low logistics efficiency in a mixed-flow parallel production line. To reduce the energy consumption, a novel method considering an independent buffer configuration and idle energy consumption analysis is proposed for this production line's layout design. A logistics intensity model and a machine tool availability model are established to investigate the influences of independent buffer area configuration on the logistics intensity and machine tool availability. To solve the coupling problem between machine tools in such production lines, a decoupling strategy for the relationship between machine tool processing rates is explored. An energy consumption model for the machine tools, based on an optimized configuration of independent buffers, is proposed. This model can effectively reduce the idle energy consumption of the machine tools while designing the workshop layout. Subsequently, considering the problems encountered in workshop production, a comprehensive optimization model for the mixed-flow production line is developed. To verify the effectiveness of the mathematical model, it is applied to an aviation cabin production line. The results indicate that it can effectively solve the layout problem of mixed-flow parallel production lines and reduce the idle energy consumption of machine tools during production. The proposed buffer configuration and layout design method can serve as a theoretical and practical reference for the layout design of mixed-flow parallel production lines.
Keyword ：
Mixed flow production line Mixed flow production line Layout design Layout design Energy consumption Energy consumption Independent buffer configuration Independent buffer configuration
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| GB/T 7714 | Zhang, Cai-Xia , Dong, Shu-Lin , Chu, Hong-Yan et al. Layout design of a mixed-flow production line based on processing energy consumption and buffer configuration [J]. | ADVANCES IN MANUFACTURING , 2021 , 9 (3) : 369-387 . |
| MLA | Zhang, Cai-Xia et al. "Layout design of a mixed-flow production line based on processing energy consumption and buffer configuration" . | ADVANCES IN MANUFACTURING 9 . 3 (2021) : 369-387 . |
| APA | Zhang, Cai-Xia , Dong, Shu-Lin , Chu, Hong-Yan , Ding, Guo-Zhi , Liu, Zhi-Feng , Guo, Shi-Yao et al. Layout design of a mixed-flow production line based on processing energy consumption and buffer configuration . | ADVANCES IN MANUFACTURING , 2021 , 9 (3) , 369-387 . |
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Abstract ：
The machine bed and the concrete foundation are connected by anchor bolts. Foundation creep is a comprehensive manifestation of foundation stability. The size and change of foundation creep affect the dynamic characteristics of the bed-foundation interface and the working state of heavy machine tools. In this paper, the contact problem between bed and foundation made of heterogeneous materials is solved, a concrete crushing hypothesis is proposed, and the basis for determining the elastic-elastoplastic-crushing critical deformation parameters of the concrete surface is formulated. Based on the Hertz contact and fractal theories, an equivalent contact model of the joint is developed, revealing the nonlinear mechanical behavior of the bolted contact surface. The cement hydration and foundation creep factors under continuous loading are taken simultaneously into consideration, and the change trend of the compressive strength and elastic modulus of the concrete at the later stage of loading is determined. By comprehensively analyzing the simulation and experimental results, the error of the theoretical model was found to be within 10%, which verifies the correctness of the proposed theoretical model. Finally, by assuming that the external load remains unchanged, a contact stiffness prediction model based on foundation creep is developed, which can provide a new basis for the contact modeling of bed-concrete foundation joint surfaces.
Keyword ：
Heterogeneous materials Heterogeneous materials Contact stiffness Contact stiffness Prediction model Prediction model Joint surface Joint surface Foundation creep Foundation creep
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| GB/T 7714 | Zhao Yongsheng , Niu Nana , Chu Hongyan et al. Calculation method of the contact stiffness of bed-foundation interfaces considering foundation creep [J]. | JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING , 2021 , 43 (9) . |
| MLA | Zhao Yongsheng et al. "Calculation method of the contact stiffness of bed-foundation interfaces considering foundation creep" . | JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING 43 . 9 (2021) . |
| APA | Zhao Yongsheng , Niu Nana , Chu Hongyan , Li Ying , Jiang Kai , Meng Lingjun . Calculation method of the contact stiffness of bed-foundation interfaces considering foundation creep . | JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING , 2021 , 43 (9) . |
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Abstract ：
The self-loosening of high strength bolt caused by vibration has been widely studied. However, the short-term self-loosening behavior of the high strength bolt when it is not subject to an external load has not received attention. This behavior will also lead the bolt preload to attenuate. Since the theoretical analysis of self-loosening behavior is difficult, this paper uses the finite element method to construct an accurate three-dimensions model with thread lift angle for numerical analysis. A new method is proposed to analyze the self-loosening behavior. The self-loosening behavior caused by the elasticity and plasticity of the bolted joint at different deformation periods is compared and analyzed. Besides, the evolution of the self-loosening behavior under different conditions is explored. The analysis results show that the torsional deformation of the thread leads to the relative slip of the internal and external threads. This results in the self-loosening of the thread in the elastic condition. In the elastic-plastic deformation condition, the self-loosening behavior is caused by the relative slip of the internal and external threads and plastic deformation. The weight of plastic deformation is greater. In addition, this behavior has the characteristics of increasing with increased tightening torque and decreasing with increased friction coefficient.
Keyword ：
High strength bolts High strength bolts Self-loosening Self-loosening Finite element analysis Finite element analysis Elastic-plastic deformation Elastic-plastic deformation
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| GB/T 7714 | Liu, Zhifeng , Wang, Baoen , Li, Ying et al. Analysis of self-loosening behavior of high strength bolts based on accurate thread modeling [J]. | ENGINEERING FAILURE ANALYSIS , 2021 , 127 . |
| MLA | Liu, Zhifeng et al. "Analysis of self-loosening behavior of high strength bolts based on accurate thread modeling" . | ENGINEERING FAILURE ANALYSIS 127 (2021) . |
| APA | Liu, Zhifeng , Wang, Baoen , Li, Ying , Zhang, Caixia , Wang, Yuezhen , Chu, Hongyan . Analysis of self-loosening behavior of high strength bolts based on accurate thread modeling . | ENGINEERING FAILURE ANALYSIS , 2021 , 127 . |
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Abstract ：
Hydrophilic polymer coatings can improve the surface characteristics of artificial implants. However, because they are used in vivo, they inevitably come into contact with biomolecules that affect their interfacial tribological properties. In this paper, the friction behaviors of poly(vinylphosphonic acid) (PVPA)-modified Ti6Al4V and polytetrafluorethylene balls were analyzed using albumin, globulin, aggrecan, and hyaluronic acid as lubricants. The interaction properties and dynamic adsorption characteristics of the biomolecules and PVPA molecules were explored by a quartz crystal microbalance to identify the cause of the friction difference. It was found that protein molecules disturbed the superlubricity of the PVPA-phosphate-buffered saline system because of the formation of a stable adsorption film, which replaced the interfacial characteristics of the PVPA coating. Polysaccharides, with their excellent hydration properties and polymer structure, had an unstable dynamic interaction or zero adsorption with PVPA molecules, and hardly changed the superlubricity of the PVPA and phosphate-buffered-saline system. The influence mechanism of the specific friction of proteins and polysaccharides was analyzed. Interactions were observed among different biomolecules. Polysaccharides can potentially reduce protein adsorption. The result of the synergistic regulation of the friction coefficient for PVPA-modified Ti6Al4V is approximately 0.017. The results of this study will provide a theoretical basis for the use of polymer coatings in vivo.
Keyword ：
polysaccharide polysaccharide hydrophilic polymer hydrophilic polymer protein protein superlubricity superlubricity
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| GB/T 7714 | Zhang, Caixia , Chen, Junmin , Liu, Mengmeng et al. Regulation mechanism of biomolecule interaction behaviors on the superlubricity of hydrophilic polymer coatings [J]. | FRICTION , 2020 , 10 (1) : 94-109 . |
| MLA | Zhang, Caixia et al. "Regulation mechanism of biomolecule interaction behaviors on the superlubricity of hydrophilic polymer coatings" . | FRICTION 10 . 1 (2020) : 94-109 . |
| APA | Zhang, Caixia , Chen, Junmin , Liu, Mengmeng , Liu, Yuhong , Liu, Zhifeng , Chu, Hongyan et al. Regulation mechanism of biomolecule interaction behaviors on the superlubricity of hydrophilic polymer coatings . | FRICTION , 2020 , 10 (1) , 94-109 . |
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Abstract ：
On the basis of experiment platform, the deformation of the inking roller and the movement behavior of the rollers, including the axial movement of the vibrator roller and the speed of vibrator roller and inking roller, are measured. The results show that a speed difference exists between the two rollers, with a significant increase of the driving roller speed, the rotation speed difference and the line speed difference between the two rollers increase, i.e., the higher the vibrator roller speed is, the larger speed difference between inking roller and vibrator roller is; with the increase of ink amount on the roller surface, the speed difference increases significantly. Through the experiment data, the characteristics of the inking roller deformation and the rollers movement behavior are analyzed.
Keyword ：
Deformation Deformation Rotation Speed Difference Rotation Speed Difference Axial Movement Axial Movement Line Speed Difference Line Speed Difference
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| GB/T 7714 | Shen, Ruiqing , Chu, Hongyan , Zhao, Juntao et al. Experiment Analysis of Ink Roller Deformation and Movement Behavior [C] . 2016 : 453-460 . |
| MLA | Shen, Ruiqing et al. "Experiment Analysis of Ink Roller Deformation and Movement Behavior" . (2016) : 453-460 . |
| APA | Shen, Ruiqing , Chu, Hongyan , Zhao, Juntao , Cai, Ligang . Experiment Analysis of Ink Roller Deformation and Movement Behavior . (2016) : 453-460 . |
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Abstract ：
Ink layer thickness on the printing plate greatly influences uniformity of ink transferred to the substrates, which is an important indicator of printing quality, so the study of ink layer and its thickness is important for improving the quality of printing products. Ansys CFX is used here to build a model of ink fluid adhering to lower vibrator roller, form inking roller, and printing plate for analyzing ink transferring in inking process.Ink layer thickness on each position of the model is acquired to analyze the forming mechanism of ink layer on printing plate, as well as the influence of oscillation speed of lower vibrator roller and dot area percentage of plate on ink layer thickness of printing plate. It can be concluded that, in the case of fixed ink supplying amount, ink layer thickness increases along with the increasing of oscillation speed, and decreases when the dot area percentage is getting larger and the minimum is got when the dot area percentage is 100%. At last, experiment of plate inking on print ability tester verifies the correctness of the simulation analysis. Copyright © by HIGH TECHNOLOGY LETTERS PRESS.
Keyword ：
Printing plates Printing plates Rollers (machine components) Rollers (machine components) Printing Printing Vibrators Vibrators
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| GB/T 7714 | Chu, Hongyan , Xu, Kangjian , Zhang, Xiaolin et al. Forming mechanism of ink layer on the printing plate in inking process and influencing factors of its thickness [J]. | High Technology Letters , 2016 , 22 (3) : 297-304 . |
| MLA | Chu, Hongyan et al. "Forming mechanism of ink layer on the printing plate in inking process and influencing factors of its thickness" . | High Technology Letters 22 . 3 (2016) : 297-304 . |
| APA | Chu, Hongyan , Xu, Kangjian , Zhang, Xiaolin , Cai, Ligang . Forming mechanism of ink layer on the printing plate in inking process and influencing factors of its thickness . | High Technology Letters , 2016 , 22 (3) , 297-304 . |
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Abstract ：
In the inking system of an offset printing press, a vibrator roller distributes ink not only in the circumferential direction but also in the axial direction. In the control process, if ink amount is determined only by the dot area coverage without considering the impact of vibrator roller's oscillation, the printing colour quality will be reduced. This paper describes a method of calculating the impact factor of vibrator roller's oscillation. First, the oscillation performance is analyzed and sample data of impact factor is got. Then, a fuzzy controller used for the calculation of the impact factor is designed, and genetic algorithm is used to optimize membership functions and obtain the fuzzy control rules automatically. This fuzzy controller can be used to calculate impact factors for any printing condition, and the impact factors can be used for ink amount control in printing process and it is important for higher printing colour quality and lowering ink and paper waste. ©, 2015, Inst. of Scientific and Technical Information of China. All right reserved.
Keyword ：
Offset printing Offset printing Fuzzy control Fuzzy control Process control Process control Membership functions Membership functions Genetic algorithms Genetic algorithms Rollers (machine components) Rollers (machine components) Vibrators Vibrators Controllers Controllers Color Color Printing presses Printing presses
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| GB/T 7714 | Chu, Hongyan , Yang, Junjing , Cai, Ligang . Calculation of impact factor of vibrator oscillation in offset printing based on fuzzy controller and genetic algorithm [J]. | High Technology Letters , 2015 , 21 (1) : 15-21 . |
| MLA | Chu, Hongyan et al. "Calculation of impact factor of vibrator oscillation in offset printing based on fuzzy controller and genetic algorithm" . | High Technology Letters 21 . 1 (2015) : 15-21 . |
| APA | Chu, Hongyan , Yang, Junjing , Cai, Ligang . Calculation of impact factor of vibrator oscillation in offset printing based on fuzzy controller and genetic algorithm . | High Technology Letters , 2015 , 21 (1) , 15-21 . |
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