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The S-N Curve Fitted by the Least Square Method Considering the Effect of Length of the Confidence Interval

Yang Xiaohua,Jin Ping,Yao Weixing

Strategic Study of CAE 2004, Volume 6, Issue 4,   Pages 41-43

Abstract:

The S-N curve is the base of calculating fatigue structural life.The calculating results show that the S-N curve which is gained by the least square method consideringthe effect of length of the confidence interval is more reliable and secure than the S-N curve which

Keywords： confidence interval     fatigue life     least square method     S-N curve    

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Analysis of Calendar Life of Aircraft Structure on Corrosion Environment

Yang Xiaohua,Yao Weixing,Chen Yueliang

Strategic Study of CAE 2002, Volume 4, Issue 6,   Pages 33-35

Abstract: On the basis of dynamic S-N curve, traditional nominal stress-method and Miner theory, this paper put

Keywords： aircraft structure     calendar life     corrosion     fatigue     S-N curve    

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Experiment study on fatigue property of concrete filled steel pipe K-joints

Zhong Xingu,Yang Sheng,Shi Weihua

Strategic Study of CAE 2011, Volume 13, Issue 9,   Pages 97-100

Abstract: Moreover, the S—N curve of concrete filled steel pipe K-joints proposed by this paper would be

Keywords： concrete filled steel pipe K-joints     fatigue property     S—N curve    

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Interpolation of a spline developable surface between a curve and two rulings

Alicia CANTÓN,Leonardo FERNÁNDEZ-JAMBRINA

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 3,   Pages 173-190 doi: 10.1631/FITEE.14a0210

Abstract: paper we address the problem of interpolating a spline developable patch bounded by a given spline curveTo complete the boundary of the patch, a second spline curve is to be given.

Keywords： Developable surfaces     Spline surfaces     Blossoms    

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Detection of void and metallic inclusion in 2D piezoelectric cantilever beam using impedance measurements

S. SAMANTA, S. S. NANTHAKUMAR, R. K. ANNABATTULA, X. ZHUANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 542-556 doi: 10.1007/s11709-018-0496-0

Abstract: current work is to improve the existing inverse methodology of void-detection based on a target impedance curveIn this work, mode-shape dependent shifting phenomenon of peaks of impedance curve with change in voiditeration starting from each initial guess, the difference between the computationally obtained impedance curveand the target impedance curve has been reduced.

Keywords： piezoelectricity     impedance curve     mode shapes     inverse problem     flaw detection     curve shifting    

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Cyclic stress-strain behavior of structural steel with yield-strength up to 460 N/mm

Yiyi CHEN,Wei SUN,Tak-Ming CHAN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 178-186 doi: 10.1007/s11709-014-0245-y

Abstract: hysteresis material behavior of structural carbon steel with nominal yield strength between 235 to 420 N/and captured further the experimental behavior of test specimens with nominal yield strength of 460 N/

Keywords： constitutive model     finite element analysis     hysteresis curve     Ramberg-Osgood equation    

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Is there an inverted U-shaped curve?Empirical analysis of the Environmental Kuznets Curve in agrochemicals

Fei LI,Suocheng DONG,Fujia LI,Libiao YANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 276-287 doi: 10.1007/s11783-014-0700-y

Abstract: cointegration, and panel-based dynamic ordinary least squares to investigate the Environmental Kuznets CurveThis relationship takes on the inverted U-shaped Environmental Kuznets Curve, and the value of the turning

Keywords： Environmental Kuznets Curve     agrochemical     China    

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Research on Social Risk of the Massing Crowd in Public Venues

Li Jianfeng,Liu Mao,Sui Xiaolin

Strategic Study of CAE 2007, Volume 9, Issue 6,   Pages 88-93

Abstract: In the end,  the F - N curve will be achieved.To use the F - N curve,  it is able to analyse the social risk of crowd massing venues.

Keywords： crowd massing risk     social risk     F-N curve     quantitative risk analysis    

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Strength reduction factors for structural rubbercrete

Bashar S. MOHAMMED,N. J. AZMI

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 3,   Pages 270-281 doi: 10.1007/s11709-014-0265-7

Abstract: Many researches have been carried out to study the fresh and hardened properties of concrete containing crumb rubber as replacement to fine aggregate by volume, yet there is no specific guideline has been developed on the mix design of the rubbercrete. The experimental program, which has been developed and reported in this paper, is designed and executed to provide such mix design guidelines. A total of 45 concrete mixes with three different water to cement ratio (0.41, 0.57 and 0.68) were cast and tested for fresh and mechanical properties of rubbercrete such as slump, air content, unit weight, compressive strength, flexural strength, splitting tensile strength and modulus of elasticity. Influence of mix design parameters such as percentage of crumb rubber replacement, cement content, water content, fine aggregate content, and coarse aggregate content were investigated. Three levels of slump value (for conventional concrete mixes) has been selected; low, medium and high slump. In each slump level, water content was kept constant. Equations for the reduction factors (RFs) for compressive strength, flexural strength, splitting tensile strength and modulus of elasticity have been developed. These RFs can be used to design rubbercrete mixes based on the conventional mix (0% crumb rubber content)

Keywords： crumb rubber     recycled tire     mix design     reduction factor     strength     modulus elasticity    

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Three potential benefits of the EU and IMO’s landmark efforts to monitor carbon dioxide emissions from

Shuaian WANG, Lu ZHEN, Harilaos N. PSARAFTIS

Frontiers of Engineering Management 2021, Volume 8, Issue 2,   Pages 310-311 doi: 10.1007/s42524-020-0096-2

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Morphological and mechanical characterization of a PMMA/CdS nanocomposite

Vishal MATHUR, Manasvi DIXIT, K.S. RATHORE, N. S. SAXENA, K.B. SHARMA

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2,   Pages 258-263 doi: 10.1007/s11705-010-1014-7

Abstract: This study reveals that the glass transition temperature ( ), Young’s modulus, and fracture energy of

Keywords： poly(methyl methacrylate) (PMMA)     filler nanoparticles     polymer semiconducting nanocomposite     tensile properties     glass transition temperature    

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Decoration of vertically aligned TiO

Heba ALI, N. ISMAIL, M. S. AMIN, Mohamed MEKEWI

Frontiers in Energy 2018, Volume 12, Issue 2,   Pages 249-258 doi: 10.1007/s11708-018-0547-1

Abstract: WO decorated photoelectrodes of titanium nanotube arrays (W-oxide TNTAs) were synthesized via a two-step process, namely, electrochemical oxidation of titanium foil and electrodeposition of W-oxide for various interval times of 1, 2, 3, 5, and 20 min to improve the photoelectrochemical performance and the amount of hydrogen generated. The synthesized photoelectrodes were characterized by various characterization techniques. The presence of tungsten in the modified TNTAs was confirmed using energy dispersive X-ray spectroscopy (EDX). Field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscope (HRTEM) proved the deposition of W-oxide as small particles staked up on the surface of the tubes at lower deposition time whereas longer times produced large and aggregate particles to mostly cover the surface of TiO nanotubes. Additionally, the incorporation of WO resulted in a shift of the absorption edge toward visible light as confirmed by UV-Vis diffuse reflectance spectroscopy and a decrease in the estimated band gap energy values hence, modified TNTAs facilitated a more efficient utilization of solar light for water splitting. From the photoelectrochemical measurement data, the optimal photoelectrode produced after 2 min of deposition time improved the photo conversion efficiency and the hydrogen generation by 30% compared to that of the pure TNTA.

Keywords： titanium dioxide nanotube arrays     potentiostaticanodization     electrodeposition method     tungsten oxide     photoelectrochemical water splitting    

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Cracking evolution behaviors of lightweight materials based on

Luo, S. C. Wu, Y. N. Hu, Y. N. Fu

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4,   Pages 461-481 doi: 10.1007/s11465-018-0481-2

Abstract:

Damage accumulation and failure behaviors are crucial concerns during the design and service of a critical component, leading researchers and engineers to thoroughly identifying the crack evolution. Third-generation synchrotron radiation X-ray computed microtomography can be used to detect the inner damage evolution of a large-density material or component. This paper provides a brief review of studying the crack initiation and propagation inside lightweight materials with advanced synchrotron three-dimensional (3D) X-ray imaging, such as aluminum materials. Various damage modes under both static and dynamic loading are elucidated for pure aluminum, aluminum alloy matrix, aluminum alloy metal matrix composite, and aluminum alloy welded joint. For aluminum alloy matrix, metallurgical defects (porosity, void, inclusion, precipitate, etc.) or artificial defects (notch, scratch, pit, etc.) strongly affect the crack initiation and propagation. For aluminum alloy metal matrix composites, the fracture occurs either from the particle debonding or voids at the particle/matrix interface, and the void evolution is closely related with fatigued cycles. For the hybrid laser welded aluminum alloy, fatigue cracks usually initiate from gas pores located at the surface or sub-surface and gradually propagate to a quarter ellipse or a typical semi-ellipse profile.

Keywords： fatigue crack initiation and growth     fatigue damage mechanism     damage tolerance     defect characterization     laser welded aluminum alloys    

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Multiobjective trajectory optimization of intelligent electro-hydraulic shovel

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0706-2

Abstract: The proposed cubic polynomial S-curve is employed to plan the crowd and hoist speed of EHS.

Keywords： trajectory planning     electro-hydraulic shovel     cubic polynomial S-curve     multiobjective optimization    

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The Arithmetic of GTEM Cell Axe-shaped Piece´s Side Curve Equation

Zhou Xu

Strategic Study of CAE 2003, Volume 5, Issue 9,   Pages 36-38

Abstract: So this paper gives the exact continuous curve equation for the axe-shaped piece´s two sides for

Keywords： giga-hz transverse electromagnetic cell     the axe-shaped piece     the side curve equation     impedance matching    

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Title Author Date Type Operation

The S-N Curve Fitted by the Least Square Method Considering the Effect of Length of the Confidence Interval

Yang Xiaohua,Jin Ping,Yao Weixing

Journal Article

Analysis of Calendar Life of Aircraft Structure on Corrosion Environment

Yang Xiaohua,Yao Weixing,Chen Yueliang

Journal Article

Experiment study on fatigue property of concrete filled steel pipe K-joints

Zhong Xingu,Yang Sheng,Shi Weihua

Journal Article

Interpolation of a spline developable surface between a curve and two rulings

Alicia CANTÓN,Leonardo FERNÁNDEZ-JAMBRINA

Journal Article

Detection of void and metallic inclusion in 2D piezoelectric cantilever beam using impedance measurements

S. SAMANTA, S. S. NANTHAKUMAR, R. K. ANNABATTULA, X. ZHUANG

Journal Article

Cyclic stress-strain behavior of structural steel with yield-strength up to 460 N/mm

Yiyi CHEN,Wei SUN,Tak-Ming CHAN

Journal Article

Is there an inverted U-shaped curve?Empirical analysis of the Environmental Kuznets Curve in agrochemicals

Fei LI,Suocheng DONG,Fujia LI,Libiao YANG

Journal Article

Research on Social Risk of the Massing Crowd in Public Venues

Li Jianfeng,Liu Mao,Sui Xiaolin

Journal Article

Strength reduction factors for structural rubbercrete

Bashar S. MOHAMMED,N. J. AZMI

Journal Article

Three potential benefits of the EU and IMO’s landmark efforts to monitor carbon dioxide emissions from

Shuaian WANG, Lu ZHEN, Harilaos N. PSARAFTIS

Journal Article

Morphological and mechanical characterization of a PMMA/CdS nanocomposite

Vishal MATHUR, Manasvi DIXIT, K.S. RATHORE, N. S. SAXENA, K.B. SHARMA

Journal Article

Decoration of vertically aligned TiO

Heba ALI, N. ISMAIL, M. S. AMIN, Mohamed MEKEWI

Journal Article

Cracking evolution behaviors of lightweight materials based on

Luo, S. C. Wu, Y. N. Hu, Y. N. Fu

Journal Article

Multiobjective trajectory optimization of intelligent electro-hydraulic shovel

Journal Article

The Arithmetic of GTEM Cell Axe-shaped Piece´s Side Curve Equation

Zhou Xu

Journal Article