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| 1 | Review on monolayer CBN superabrasive wheels for grinding metallic materials显示文摘A state-of-the-art review on monolayer electroplated and brazed cubic boron nitride(CBN) superabrasive wheels for grinding metallic materials has been provided in this article. The fabrication techniques and mechanisms of the monolayer CBN wheels are discussed. Grain distribution, wheel dressing, wear behavior, and wheel performance are analyzed in detail. Sample applications of monolayer CBN wheel for grinding steels, titanium alloys, and nickel-based superalloys are also provided. Finally, this article highlights opportunities for further investigation of monolayer CBN grinding wheels. | Ding Wenfeng Barbara Linke Zhu Yejun Li Zheng Fu Yucan Su Honghua Xu Jiuhua | 2017 | Chinese Journal of Aeronautics2017，30，1： | 24 |
| 2 | Residual stresses of polycrystalline CBN abrasive grits brazed with a high-frequency induction heating technique显示文摘Residual stresses produced in polycrystalline CBN abrasive grits during a high-frequency induction brazing process are calculated by using ?nite element analysis, with a consideration of the nonuniform temperature distribution in the induction brazing model. The in?uences of induction brazing parameters on the residual stresses of polycrystalline CBN abrasive grits have been analyzed, including the embedding depth, grit side length, etc. Results obtained show that the tensile stress with a 40% embedding depth is 292 MPa, which is the minimum on the bonding interface compared with other embedding depths. Meanwhile, the maximum tensile stress is 575 MPa, with an increase of 59% compared with that of a grit side length of 50 mm. Finally, the simulation results of the brazing residual stress of polycrystalline CBN abrasive grits have been con?rmed valid based on the residual stress measurement of the brazed monocrystalline CBN grit. | Wei XU Yejun ZHU Baicun DU Wenfeng DING | 2019 | Chinese Journal of Aeronautics2019，32，4： | 2 |
| 3 | Vibration coupling effects and machining behavior of ultrasonic vibration plate device for creep-feed grinding of Inconel 718 nickel-based superalloy显示文摘Ultrasonic vibration-assisted grinding(UVAG)is an effective and promising method for machining of hard-to-cut materials.This article proposed an ultrasonic vibration plate device enabling the longitudinal full-wave and transverse half-wave(L2T1)vibration mode for UVAG.The characteristics of two-dimensional coupled vibration in different directions were analyzed on the basis of apparent elastic method and finite element method.Furthermore,a correction factor was applied to correct the frequency error caused by the apparent elastic method.Finally,the comparative experiments between the conventional creep-feed grinding and UVAG of Inconel 718 nickel-based superalloy were carried out.The results indicate that the apparent elastic method with the correction factor is accurate for the design of plate device under the L2T1 vibration mode.Compared with the conventional creep-feed grinding,the UVAG causes the reduction of grinding force and the improvement of machined surface quality of Inconel 718 nickel-based superalloy.Furthermore,under the current experimental conditions,the optimal ultrasonic vibration amplitude is determined as 6μm,with which the minimum surface roughness is achieved. | Yang CAO Yejun ZHU Wenfeng DING Yutong QIU Lifeng WANG Jiuhua XU | 2022 | Chinese Journal of Aeronautics2022，35，2： | 2 |
| 4 | X-ray spectrometry using polyeapillary X-ray optics and position sensitive detector显示文摘 | Ding Xun-liang Xie Jing-dong He Yejun | 2000 | Talanta2000，53，： | 1 |
| 5 | X-ray spectrometry using polycapillary X-ray optics and position sensitive detector显示文摘 | Ding Xunliang Xie Jingdong He Yejun | 2000 | Talanta2000，53，： | 1 |
| 6 | X-ray spectrometry using polycapillary X-ray optics and position sensitive detector 显示文摘 | Ding Xunliang Xie J D He Yejun | 2000 | Talanta2000，53，： | 1 |
| 7 | X-ray spectrometry using polycapillary X-ray optics and position sensitive detector显示文摘 | Ding Xunliang Xie Jingdong He Yejun | 2000 | Talanta2000，53，： | 1 |
| 8 | Aerodynamic stability evolution tendency of suspension bridges with spans from 1000 to 5000 m显示文摘Aerodynamic instability owing to aerostatic and flutter-related failures is a significant concern in the wind-resistant design of long-span suspension bridges.Based on the dynamic characteristics of suspension bridges with spans ranging from 888 to 1991 m,we proposed fitted equations for increasing spans and base frequencies.Finite element models of suspension bridges with increasing span from 1000 to 5000 m were constructed.The structural parameters were optimized to follow the fitted tendencies.To analyze the aerodynamic instability,streamlined single-box section(SBS),lattice truss section(LTS),narrow slotted section(NSS),and wide slotted section(WSS)were considered.We performed three-dimensional(3-D)full-mode flutter analysis and nonlinear aerostatic instability analysis.The flutter critical wind speed continuously decreases with span growth,showing an unlimited approaching phenomenon.Regarding aerostatic instability,the instability wind speed decreases with span to approximately 3000 m,and increases when the span is in the range of 3000 to 5000 m.Minimum aerostatic instability wind speed with SBS or LTS girder would be lower than observed maximal gust wind speed,indicating the probability of aerostatic instability.This study proposes that suspension bridge with span approximately 3000 m should be focused on both aerostatic instability and flutter,and more aerodynamic configuration optimistic optimizations for flutter are essential for super long-span suspension bridges with spans longer than 3000 m. | Yejun DING Lin ZHAO Rong XIAN Gao LIU Haizhu XIAO Yaojun GE | 2023 | Frontiers of Structural and Civil Engineering2023，17，10： | 0 |
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