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Position-varying surface roughness prediction method considering compensated acceleration in milling

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 855-867 doi: 10.1007/s11465-021-0649-z

Abstract: Machined surface roughness will affect parts’ service performance.Surface roughness will be affected by system position dependent vibration even under constant parameterAiming at surface roughness prediction in the machining process, this paper proposes a position-varyingsurface roughness prediction method based on compensated acceleration by using regression analysis.Finally, by comparing the measured and predicted surface roughness curves, they have the same trends,

Keywords： surface roughness prediction     compensated acceleration     milling     thin-walled workpiece    

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Preliminary experimental study of a supercritical CO

Junhyun CHO, Hyungki SHIN, Jongjae CHO, Young-Seok KANG, Ho-Sang RA, Chulwoo ROH, Beomjoon LEE, Gilbong

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 452-460 doi: 10.1007/s11708-017-0504-4

Abstract: Research on applying a supercritical carbon dioxide power cycle (S-CO ) to concentrating solar power (CSP) instead of a steam Rankine cycle or an air Brayton cycle has been recently conducted. An S-CO system is suitable for CSP owing to its compactness, higher efficiency, and dry-cooling capability. At the Korea Institute of Energy Research (KIER), to implement an S-CO system, a 10 kWe class test loop with a turbine-alternator-compressor (TAC) using gas foil bearings was developed. A basic sub-kWe class test loop with a high-speed radial type turbo-generator and a test loop with a capability of tens of kWe with an axial type turbo-generator were then developed. To solve the technical bottleneck of S-CO turbomachinery, a partial admission nozzle and oil-lubrication bearings were used in the turbo-generators. To experience the closed-power cycle and develop an operational strategy of S-CO operated at high pressure, an organic Rankine cycle (ORC) operating test using a refrigerant as the working fluid was conducted owing to its operational capability at relatively low-pressure conditions of approximately 30 to 40 bar. By operating the sub-kWe class test loop using R134a as the working fluid instead of CO , an average turbine power of 400 W was obtained.

Keywords： supercritical CO2     power cycle     turbomachinery     compressor     turbine    

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Calculated journal bearing lubrication of non-Newtonian medium with surface roughness effects

CHEN Hao-sheng, CHEN Da-rong, WANG Jia-dao, LI Yong-jian

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 3,   Pages 270-275 doi: 10.1007/s11465-006-0028-9

Abstract: To analyze the effects of non-Newtonian lubricants and surface roughness in journal bearing lubricationFlow factors are used to specify the effect of surface roughness.Surface roughness shows an obvious effect on load capacity when it is greater than one-tenth of the filmHowever, surface roughness has less effect on lubrication results than lubricants non-Newtonian property

Keywords： rheological     dynamic     lubrication     roughness     shearing    

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Thermal analysis of lubricated three-dimensional contact bodies considering interface roughness

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0672-8

Abstract: Surface roughness and thermal action are of remarkable importance in the lubrication performance of mechanicalfocus on the full-film lubrication conditions without considering temperature rise and real 3D surface roughnesspaper, a deterministic mixed thermal elastohydrodynamic lubrication model considering real 3D surface roughnessThe influences of surface roughness and thermal effect on lubrication performance are revealed.

Keywords： thermal elastohydrodynamic lubrication     surface roughness effect     thermal effect     temperature characteristics    

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Detection of critical road roughness sections by trend analysis and investigation of driver speed interaction

Meltem SAPLIOGLU; Ayse UNAL; Melek BOCEK

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 4,   Pages 515-532 doi: 10.1007/s11709-022-0814-4

Abstract: Pavement roughness (IRI—International Roughness Index values) influence the stability of traffic movementsThis study is to determine the exact locations of critical pavement roughness values that affect trafficRoughness data with 10 m intervals were collected on a 3140 m divided road containing three consecutiveThe sections where roughness is important were determined at a 95% confidence interval.

Keywords： trend analysis     checkerboard model     IRI     driver speed    

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System identification of channel roughness for middle route project of south to north water diversion

Yang Kailin,Wang Yisen

Strategic Study of CAE 2012, Volume 14, Issue 11,   Pages 17-23

Abstract: style="text-align: justify;">This paper presents a new method for the system identification of channel roughnessAccording to the principle of hydraulics, established the relationship among channel roughness, roughsection shapes, bottom slopes and lengths etc, a universal formula is obtained for calculation of channel roughness

Keywords： channel     roughness     system identification     least square method    

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Study of the Relationship Between Fractal Model Parameters and Roughness Parameter Ra

Pan Yuliang,Wu Liqun,Zhang Yundian

Strategic Study of CAE 2004, Volume 6, Issue 5,   Pages 49-51

Abstract: The relationships between model parameters and roughness parameter Ra are studied theoretically

Keywords： W-M fractal model     fractal parameters     roughness Ra    

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Effects of process parameters on surface roughness in abrasive waterjet cutting of aluminium

M. CHITHIRAI PON SELVAN, N. MOHANA SUNDARA RAJU, H. K. SACHIDANANDA

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 439-444 doi: 10.1007/s11465-012-0337-0

Abstract: Surface roughness of machined parts is one of the major machining characteristics that play an importantThis paper shows the influence of process parameters on surface roughness (Ra) which is anTaguchi’s design of experiments was carried out in order to collect surface roughness values.The effects of these parameters on surface roughness have been studied based on the experimental results

Keywords： abrasive waterjet     aluminium     garnet     water pressure     mass flow rate     traverse speed     standoff distance    

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Research on On-line Detecting Method and Key Technologies for Part Quality (Dimension and Surface Roughness

Chen Aidi,Wang Xinyi

Strategic Study of CAE 2000, Volume 2, Issue 12,   Pages 73-77

Abstract: quality, based on the analysis of methods and features of on-line detecting of part dimension and surface roughnessdetecting of part dimension and a fuzzy neural network system for on-line detecting of part surface roughnessThe Scheme of on-line detecting method for part quality can detect part dimension and surface roughness

Keywords： on-line detecting     neural network     fuzzy neural network     dimension precision     surface roughness    

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Tribological study on the surface modification of metal-on-polymer bioimplants

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0682-6

Abstract: The relationship between surface roughness and coefficient of friction (COF) under dry and lubricatedshow that under dry test, friction coefficient is not reduced all the time with a decrease in surface roughnessOn the contrary, a threshold of roughness value is observed, and frictional force increases again belowThis critical value lies between 40 and 100 nm in Sa (roughness).Under wet test, COF always decreases with reduction in surface roughness.

Keywords： artificial joints     surface roughness     friction     surface texturing    

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Review on mechanism and process of surface polishing using lasers

Arun KRISHNAN, Fengzhou FANG

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 299-319 doi: 10.1007/s11465-019-0535-0

Abstract: parameters such as beam intensity, energy density, spot diameter, and feed rate, different rates of surface roughness

Keywords： laser polishing     surface roughness     process parameters     mechanism    

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Effects of taping on grinding quality of silicon wafers in backgrinding

Zhigang DONG, Qian ZHANG, Haijun LIU, Renke KANG, Shang GAO

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 559-569 doi: 10.1007/s11465-020-0624-0

Abstract: tapes of different thicknesses to investigate the effects of taping on peak-to-valley (PV), surface roughnessHowever, the PV value, surface roughness, and subsurface damage of silicon wafers with taping deterioratedThe surface roughness and subsurface damage of silicon wafers with taping decreased with increasing mesh

Keywords： taping     silicon wafer     backgrinding     subsurface damage     surface roughness    

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Sub-nanometer finishing of polycrystalline tin by inductively coupled plasma-assisted cutting

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0751-5

Abstract: However, the existence of grain boundary (GB) limits the surface roughness of polycrystalline tin after

Keywords： plasma-assisted cutting     polycrystalline tin     single-point diamond turning     surface roughness    

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Radiative properties of materials with surface scattering or volume scattering: A review

Qunzhi ZHU, Hyunjin LEE, Zhuomin M. HANG

Frontiers in Energy 2009, Volume 3, Issue 1,   Pages 60-79 doi: 10.1007/s11708-009-0011-3

Abstract: The approach of using measured surface roughness statistics in Monte Carlo simulations to predict radiative

Keywords： aerogel     fiber     particle scattering     radiative properties     soot     surface roughness    

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Material Mechanical Properties Necessary for the Structural Intervention of Concrete Structures Article

Tamon Ueda

Engineering 2019, Volume 5, Issue 6,   Pages 1131-1138 doi: 10.1016/j.eng.2019.02.012

Abstract:

Structural intervention involves the restoration and/or upgrading of the mechanical performances of structures. In addition to concrete and steel, which are typical materials for concrete structures, various fiber-reinforced polymers (FRP), cementitious materials with fibers, polymers, and adhesives are often applied for structural intervention. In order to predict structural performance, it is necessary to develop a generic method that is applicable to not only to steel, but also to other materials. Such a generic model could provide information on the mechanical properties required to improve the structural performance. External bonding, which is a typical scheme for structural intervention, is not applied for new structures. It is necessary to clarify material properties and structural details in order to achieve better bonding strength at the interface between the substrate concrete and an externally bonded material. This paper presents the mechanical properties of substrate concrete and relevant intervention material for the following purposes: ① to achieve better shear strength and ultimate deformation of a member after structural intervention; and ② to achieve better debonding strength for external bonding. This paper concludes that some of the mechanical properties and structural details for intervention materials that are necessary for improvement in mechanical performance in structures with structural intervention are new, and differ from those of structures without intervention. For example, high strength and stiffness are important properties for materials in structures without structural intervention, whereas high fracturing strain and low stiffness are important properties for structural intervention materials.

Keywords： Structural intervention     High fracturing strain     No yielding     Low stiffness     Roughness     fiber-reinforced    

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Title Author Date Type Operation

Position-varying surface roughness prediction method considering compensated acceleration in milling

Journal Article

Preliminary experimental study of a supercritical CO

Junhyun CHO, Hyungki SHIN, Jongjae CHO, Young-Seok KANG, Ho-Sang RA, Chulwoo ROH, Beomjoon LEE, Gilbong

Journal Article

Calculated journal bearing lubrication of non-Newtonian medium with surface roughness effects

CHEN Hao-sheng, CHEN Da-rong, WANG Jia-dao, LI Yong-jian

Journal Article

Thermal analysis of lubricated three-dimensional contact bodies considering interface roughness

Journal Article

Detection of critical road roughness sections by trend analysis and investigation of driver speed interaction

Meltem SAPLIOGLU; Ayse UNAL; Melek BOCEK

Journal Article

System identification of channel roughness for middle route project of south to north water diversion

Yang Kailin,Wang Yisen

Journal Article

Study of the Relationship Between Fractal Model Parameters and Roughness Parameter Ra

Pan Yuliang,Wu Liqun,Zhang Yundian

Journal Article

Effects of process parameters on surface roughness in abrasive waterjet cutting of aluminium

M. CHITHIRAI PON SELVAN, N. MOHANA SUNDARA RAJU, H. K. SACHIDANANDA

Journal Article

Research on On-line Detecting Method and Key Technologies for Part Quality (Dimension and Surface Roughness

Chen Aidi,Wang Xinyi

Journal Article

Tribological study on the surface modification of metal-on-polymer bioimplants

Journal Article

Review on mechanism and process of surface polishing using lasers

Arun KRISHNAN, Fengzhou FANG

Journal Article

Effects of taping on grinding quality of silicon wafers in backgrinding

Zhigang DONG, Qian ZHANG, Haijun LIU, Renke KANG, Shang GAO

Journal Article

Sub-nanometer finishing of polycrystalline tin by inductively coupled plasma-assisted cutting

Journal Article

Radiative properties of materials with surface scattering or volume scattering: A review

Qunzhi ZHU, Hyunjin LEE, Zhuomin M. HANG

Journal Article

Material Mechanical Properties Necessary for the Structural Intervention of Concrete Structures

Tamon Ueda

Journal Article