TY - JOUR AU - Tong, Linjun AU - Abdulhameed, Al-Tayari M. Y. AU - Chen, Siyu AU - Sun, Zhou TI - Non -Linear Dynamic Model and Analysis of Two -Speed Helical Gear Transmission Equipped with Two -Way Synchronizer JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 44 PY - 2023 IS - 6 SP - 533 EP - 554 PG - 22 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/34608985 ID - 34608985 AB - In response to environmental pressure and market demand, multi -stage transmission is a feasible transmission mode for Pure Electric Vehicles (PEVs). Synchronizers can effectively reduce the vibration impact of PEV during frequent gear shifting, but the lack of a theoretical model limits the further study of its influence mechanism. Hence, a 20 -degree-of-freedom (DOF) non-linear dynamic model of a two -speed helical gear (TSHG) transmission equipped with a two-way synchronizer is established considering the stiffness and friction torque of bidirectional synchronizer, time-varying meshing stiffness (TVMS), meshing damping, static transmission error (STE), gear back-lash, torsional damping, and stiffness. The comparison with the experiment indicates the effectiveness of the established dynamic model. The results of the dynamics characteristics show that compared with the (low-speed) first gear transmission, the (high-speed) second gear transmission shows complex nonlinear dynamic characteristics. The increase in support stiffness, the decrease in TVMS ratio and STE amplitude contribute to the weakening and disappearance of the chaotic motion in the system. These results provide a helpful reference for non-linear behavior restraining and vibration and noise reduction of the two -speed transmission (TST) for PEVs. LA - English DB - MTMT ER - TY - JOUR AU - Yudistiro, Danang AU - Cheng, Yung-Chang TI - Optimization Design of a Three-Piece Dental Implant System by Uniform Design and Gray Relation Analysis JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 44 PY - 2023 IS - 5 SP - 301 EP - 310 PG - 10 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/34656836 ID - 34656836 LA - English DB - MTMT ER - TY - JOUR AU - Zhao, Wei-Gang AU - Yuan, Heng-Di AU - Liu, Qi AU - Li, Xing AU - Dong, Guang-Neng TI - Tribological Properties of High Temperature Oxidation Film on Bearing Steel Sliding Against Copper -Graphite JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 44 PY - 2023 IS - 3 SP - 241 EP - 249 PG - 9 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/34242203 ID - 34242203 AB - Copper-graphite (Cu/C) materials are used as stationary ring in the mechanical contacted seals of liquid rocket turbo pumps due to their advantages including high thermal conductivity, excellent anti-corrosion and lubrication behaviors. However, the Cu/C stationary ring is subjected to severe wear at startup stage under the real working condition. To solve the problem, this study puts forward a method to modify the surface of the mating pair by high temperature oxidation films. The oxidation films were prepared under different temperatures and the tribological tests were conducted to verify the lubrication effect of the films. Furthermore, the influence of applied load and surface roughness on the tribological behaviors was investigated. In general, the oxidation film played a major role in improving tribological behavior between bearing steel and Cu/C under water lubrication condition. LA - English DB - MTMT ER - TY - JOUR AU - Darshan, S. AU - Shivaraj, B. W. AU - Bharatish, A. AU - Krishna, M. AU - Murthy, Narasimha H. N. TI - Effect of Serrated Endmill Geometry on Machining Responses of Al 2024 Thin-Walled Components JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 43 PY - 2022 IS - 6 SP - 549 EP - 558 PG - 10 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/33858880 ID - 33858880 AB - Thin-walled components are widely adopted in aircraft structures due to the eminent characteristics such as light weight, high strength to weight ratio, high usability and ergonomics. However, the lower stiffness of these components results in static and dynamic instabilities during their machining. Thus, there is a requirement to reduce the deflection, stresses and unwanted vibrations during machining of thin-walled components. Adoption of serrated end mill can cause non-uniform distribution of chip thickness, reduction of effective axial depth of cut and cutting forces and improvement of chatter stability. This paper focuses on investigating the effect of serrated end mill geometrical parameters such as the number of flutes (2, 3, and 4), helix angle (30 degrees, 35 degrees, and 45 degrees) and serration geometry (sinusoidal, median, and interrupted) on machining responses of thin-walled components. The deflections and stresses were computed using ANSYS explicit dynamics module. The thin wall deflection was mainly influenced by number of flutes and stresses by helix angle. The machining responses could be simultaneously minimized when maximum number of flutes, intermediate helix angle and median serration geometry were adopted. LA - English DB - MTMT ER - TY - JOUR AU - Li, K.-D. AU - Hong, S.-J. AU - Hu, H.-L. AU - Lin, D.T.-W. TI - Dynamics of Morphological Formation Affected by Processing Parameters in Chemical Bath Deposition JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 43 PY - 2022 IS - 3 SP - 239 EP - 249 PG - 11 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/33219912 ID - 33219912 LA - English DB - MTMT ER - TY - JOUR AU - Lin, Chun-Ming TI - Diffusion Layer Growth and Compound Formation Sequence of Titanium-Carbon Steel Tri-metal Composite (Ti-Ni-steel) Sheets Fabricated by Hot-roll Diffusion Bonding JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 42 PY - 2021 IS - 6 SP - 587 EP - 594 PG - 8 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/32966343 ID - 32966343 N1 - Export Date: 27 March 2023 Correspondence Address: Lin, C.-M.; Department of Mechanical Engineering, Taiwan AB - The primary objective in this work was to investigate the diffusion layer growth and compound formation sequence of titanium-carbon steel tri-metal composite sheets fabricated. Those results give a useful insight into the effects of different processing temperatures on the interface evolution at the Ti/Ni interface in hot-roll diffusion-bonded Ti/Ni/steel joints, and observations of microstructure and thermodynamic calculations revealed some interesting results. During the diffusion process, Ni3Ti and NiTi2 begin nucleation at nearly the same time; therefore, the thickness of the two layers was very similar. Finally, Ti and Ni diffuse to the interface between the NiTi2 and Ni3Ti compound layers to form NiTi. As the thickness of the NiTi layer increases, part of Ni3Ti is consumed; leading to a reduction in its thickness, it can be attributed to the lower reaction Gibbs free energies and surface energy increments of Ni3Ti and NiTi2. The alpha + beta Ti phases additionally exist as discrete needle-shaped particles in the matrix of Ni3Ti phase, while beta-Ti phases exist as discrete islands in the matrix of NiTi2 phase. The presence of Ni in the interfacial zone adjacent to the Ti substrate stabilizes beta-Ti phase, leads to the formation of needle-shaped alpha + beta-Ti phase. LA - English DB - MTMT ER - TY - JOUR AU - Lin, Alan C. AU - Chen, Chao-Fan TI - Computer-Aided Sequence Planning for Bending Operations of 3D Sheet Metals with Many Bends in Various Directions JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 42 PY - 2021 IS - 6 SP - 571 EP - 580 PG - 10 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/32944004 ID - 32944004 AB - The most complex step in sheet metal production is the bending process, and the planning of a bending sequence directly impacts the feasibility of sheet metal processing. This paper proposes a set of principles to be followed for the planning of bending sequences. It first uses the rule "the more bending lines, the better" to select an appropriate datum plane out of all the possible bending planes of a 3D sheet metal. Based on the selected datum plane, the rule "the smaller angle between bending lines, the better" is applied to divide the sheet metal into a number of bend segments. In the second step, six bending patterns are defined based on the geometric characteristics of various bending operations. Each of the bend segments determined in the first step is then compared with the six bending patterns to obtain a bending sequence for each bend segment. Lastly, the order of the bend segments is arranged by following the principle "minimum-height, first-processed" to obtain the final bending sequence for the entire sheet metal. LA - English DB - MTMT ER - TY - JOUR AU - Chen, C.-Y. AU - Chou, H.-M. AU - Chen, S.-K. TI - A Study on Better Temperature of Anoxic Pyrolysis Process in Oil Palm Kernel Shell Treatment Plant JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 42 PY - 2021 IS - 5 SP - 471 EP - 478 PG - 8 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/32601129 ID - 32601129 N1 - Department of Mechanical Engineering, Kun Shan University, Tainan, 71070, Taiwan Department of Environmental Engineering, Kun Shan University, Tainan, 71070, Taiwan Export Date: 17 January 2022 Correspondence Address: Chen, S.-K.; Department of Environmental Engineering, Taiwan LA - English DB - MTMT ER - TY - JOUR AU - Lin, Sheng-Chao AU - Tsai, Ruey AU - Chen, Kuan-Yu AU - Chiu, Chia-Pin TI - Chassis Skin Temperature Transient Prediction Model of Electronics Devices JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 42 PY - 2021 IS - 3 SP - 295 EP - 301 PG - 7 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/32392608 ID - 32392608 AB - An electronic device chassis skin temperature transient response prediction model is proposed. This model optimizes dynamic thermal control parameters using simulations. The thermal interaction between the chassis skin, chassis material and environment were analyzed and simplified into an energy balance equation. By solving this equation, chassis skin transient thermal response function corresponding to the processor temperature is established. The system prediction model was built after identifying the system parameters. This approach quickly establishes the chassis skin temperature transient model for an electronics system without complicated calculations or time consuming CFD modeling processing. The experimental data shows the error is within 1.43 degrees C (9.1%) and 6000 prediction calculation seconds within the Microsoft (R) Excel (TM) environment. This model benefits engineers interested in electronic device optimizing system performance using simulations. LA - English DB - MTMT ER - TY - JOUR AU - Lei, Y. AU - Wen, G. AU - Geng, X. AU - Fu, Y. AU - Li, X. AU - Hu, J. TI - Comprehensive control of steering and braking via a 4WIS-4WID vehicle JF - JOURNAL OF THE CHINESE SOCIETY OF MECHANICAL ENGINEERS J2 - J CHIN SOC MECH ENG VL - 42 PY - 2021 IS - 3 SP - 303 EP - 313 PG - 11 SN - 0257-9731 UR - https://m2.mtmt.hu/api/publication/32235926 ID - 32235926 N1 - State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, China Qingdao Automotive Research Institute, Jilin University, Qingdao, China Export Date: 23 September 2021 Correspondence Address: Wen, G.; State Key Laboratory of Automotive Simulation and Control, China Funding details: JJKH20200963K J Funding details: 18-1-2-17-zhc Funding details: National Key Research and Development Program of China, NKRDPC, 2018YFB0104901 Funding details: Science and Technology Planning Project of Guangdong Province, 20160519008JH, 20170204073GX Funding text 1: This work was supported by the National Key Research and Development Program of China [grant number 2018YFB0104901]; the Science and Technology Planning Project of Jilin Province [grant number 20160519008JH]; the Science and Technology Planning Project of Jilin Province [grant number 20170204073GX]; the Science and Technology Project of Jilin Provinc ial Department of Education (No. JJKH20200963K J); and Science and Technology Project of Qingdao [grant number 18-1-2-17-zhc]. Funding text 2: The authors would like to thank the National Key Research and Development Program of China, the Science and Technology Planning Project of Jilin Province, the Science and Technology Planning Project of Jilin Province, and Science and Technology Project of Qingdao for providing the authors with their support. Disclosure statement No potential conflict of interest was reported by the authors. Funding text 3: This work was supported by the National Key Research and Development Program of China [grant number 2018YFB0104901]; the Science and Technology Planning Project of Jilin Province [grant number 20160519008JH]; the Science and Technology Planning Project of Jilin Province [grant number 20170204073GX]; the Science and Technology Project of Jilin Provincial Department of Education (No. JJKH20200963KJ); and Science and Technology Project of Qingdao [grant number 18-1-2-17-zhc]. AB - Four-wheel independent steering and four- wheel independent driving (4WIS-4WID) vehicles have multiple degrees of control freedom. Thus, these vehicles have considerable development potential. However, 4WIS-4WID vehicles easily cause coupling interference between the steering and braking systems. Such interference leads to remarkable difficulties in the design and optimisa-tion of the control system. The comprehensive control of the two systems is realised on the basis of 4WIS-4WID vehicles in this paper. Such control solves the coupling problem between the two systems and achieves improved handling perfor-mance whilst guaranteeing the braking stability. This paper mainly includes two parts. Firstly, the linear two degrees-of-freedom model is regarded as a reference model, and a sliding-mode controller is designed to achieve good handling performance. Secondly, a neural network PID cooperative controller is designed to maintain braking stability whilst ensuring handling performance. Lastly, a Simulink/CarSim joint simulation is conducted to confirm the good performance of the proposed strategy. © 2021, Chinese Mechanical Engineering Society. All right reserved. LA - English DB - MTMT ER -