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Browsing by Author "Xu, Yigeng"
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An aerodynamic analysis of a novel small wind turbine based on impulse turbine principles
Ying, Pei; Chen, Yong; Xu, Yigeng (2015-03-31)The paper presents both a numerical and an experimental approach to study the air flow characteristics of a novel small wind turbine and to predict its performance. The turbine model was generated based on impulse turbine ... -
An analytical model for the identification of the threshold of stress intensity factor range for crack growth
Grasso, Marzio; De Iorio, Antonio; Xu, Yigeng; Haritos, George; Mohin, Muhodin; Chen, Yong (2017-01-18)The value of the stress intensity factor (SIF) range threshold (∆K_th ) for fatigue crack growth (FCG) depends highly on its experimental identification. The identification and application of ∆K_(th )are not well established ... -
Approximate expressions of maximum value of stress intensity factor of nozzle corner cracks
Shutao, C.; Xu, Yigeng (1988-01-01)Based on the flat plate-nozzle model loaded by uniform uniaxial tension, through some suitable reduction and approximation, the maximum value of stress intensity factor (K) along a crack front can be expressed by the weight ... -
Computational and Experimental Investigations of an Omni-Flow Wind Turbine
Ying, Pei; Chen, Yong; Xu, Yigeng; Tian, Yuan (2015-05-15)Both numerical and experimental studies were conducted to evaluate the performance of an omni-flow wind turbine designed to provide renewable electricity on the top of urban buildings like skyscrapers. The numerical approach ... -
Computational Modelling of Blades for a Novel Wind Turbine
Ying, Pei; Chen, Yong; Xu, Yigeng (Institute of Electrical and Electronics Engineers (IEEE), 2012-06)Blades of a novel wind turbine system based on the principles of impulse turbines were designed in 3D and tested by computational fluid dynamics (CFD) simulation. This new turbine system is suitable to construct on the ... -
Contact behaviour of composite laminate under quasi-static indentation load
Shen, Zeng; Xu, Yigeng; Chrysanthou, A. (2014)A viable solution to the ever-demanding weight-saving target in aerospace industry is the replacement of conventional engineering alloys with composite materials in primary structures. A major concern to the effective use ... -
Correlation of dent depth to maximum contact force and damage of composite laminates
Shen, Zeng; Xu, Yigeng; Chrysanthou, A. (2015-01-01)A major concern affecting the efficient use of carbon fibre reinforced composite laminates in the aerospace industry is the low velocity impact damage which may be introduced accidentally during manufacture, operation or ... -
Delamination threshold load of composite laminate under low-velocity impact
Xu, Yigeng; Shen, Zeng; Tiu, William; Xu, Yizhong; Chen, Yong; Haritos, George (2013)A key factor affecting the use of carbon fibre reinforced composite laminates is the low velocity impact damage which may be introduced accidentally during manufacture, operation or maintenance of the component. Among the ... -
Effect of Electromagnetic Treatment on Fatigue Resistance of 2011 Aluminium Alloy
Lewis, Andrew; Mohin, Muhodin; Toofanny, Hasif; Babutskyi, Anatolii; Xu, Yigeng (2016-08-08)Beneficial effects of the electromagnetic treatment on fatigue resistance were reported on several engineering alloys. These could be linked to the dislocation activity and the rearrangement of the crystal structure of the ... -
Effect of electropulsing on the fatigue resistance of aluminium alloy 2014-T6
Babutskyi, Anatolii; Mohin, Ma; Chrysanthou, Andreas; Xu, Yigeng; Lewis, Andrew (2020-01-20)The effects of electropulsing on the fatigue resistance of aluminium alloy 2014-T6 were studied in relation to electric current amplitude, pulse duration, and number of repetitions. Utilising the Taguchi method, the present ... -
Effect of Plastic Deformation on Compliance Curve Based Crack Closure Measurement
Lewis, Andrew; Mohin, Muhodin; Chrysanthou, Andreas; Xu, Yigeng (2016-09-01)Fatigue crack growth depends heavily on near tip stress-strain behavior controlled by many micromechanical and microstructural factors. Crack closure is widely used to rationalize crack growth behaviour under complex loading ... -
Exploring Advanced Functionalities of Carbon Fiber-Graded PEEK Composites as Bone Fixation Plates Using Finite Element Analysis
Zhang, Chenggong; Wen, Pihua; Xu, Yigeng; Fu, Zengxiang; Ren, Guogang (2024-01-14)This study aims to address the challenges associated with conventional metallic bone fixation plates in biomechanical applications, such as stainless steel and titanium alloys, including stress shielding, allergic reactions, ... -
Mixed mode fatigue crack propagation behaviour of aluminium F357 alloy
Grasso, Marzio; Xu, Yigeng; Russo, Roberto; Rosiello, Vincenzo (2018-08-01)Manufacturing defects are often not in the plane perpendicular to the loading direction and will propagate under mixed mode fatigue loading condition. This paper presents a numerical study of mixed mode crack growth behaviour ... -
Numerical scheme to simulate combined mixing and separating Newtonian fluid flow in a channel
Khokhar, Rahim; Chen, Yong; Calay, Rajnish; Xu, Yigeng (2013)The paper presents a semi-implicit time-stepping Taylor-Galerkin pressure correction primitive variable finite element algorithm to simulate fluid flow for two dimensional planar combined mixing and separating geometry. ... -
Numerical simulation of combined mixing and separating flow in channel filled with porous media
Khokhar, Rahim; Chen, Yong; Xu, Yigeng; Calay, Rajnish (2013-05)Various flow bifurcations are investigated for two dimensional combined mixing and separating geometry. These consist of two reversed channel flows interacting through a gap in the common separating wall filled with porous ... -
Numerical simulation of crack tip behaviour under fatigue loading
Xu, Yigeng; Tiu, William; Xu, Yizhong (2013)Fatigue damage is a localized phenomenon controlled by the near-tip crack behavior. This paper presents an application of a dislocation distribution technique to the simulation of crack tip behavior under fatigue loading. ... -
On the turbulent flow models in modelling of omni-flow wind turbine
Chen, Yong; Ying, Pei; Xu, Yigeng; Tian, Yuan (2014-10)The computational fluid dynamics (CFD) has a wide application in the wind energy industry. In CFD simulations, a turbulence model plays a significantly important role in accuracy and resource cost. In this paper, a novel ... -
A review of the effects of ice accretion on the structural behavior of wind turbines
Alsabagh, Abdel; Tiu, William; Xu, Yigeng; Virk, Muhammad (2013-02)Icing of wind turbines happens occasionally at different latitudes and locations in the world and consequently affects the wind turbine fatigue loads. Large ice accretion may cause wind turbine vibration due to uneven ice ... -
Strip yield modelling of fatigue crack under variable amplitude loading
Singh, Konjengbam Darunkumar; Xu, Yigeng; Sinclair, Ian (2011-12)The results from 'strip yield' approach of the FASTRAN type models of plasticity induced crack closure effects of fatigue cracks subjected to variable amplitude loadings are presented. The strip yield results are compared ... -
The Use of Pseudo-Inverse Methods in Reconstructing Loads on a Missile Structure
Vishwakarma, R.; Turner, Denis; Lewis, Andrew; Chen, Yong; Xu, Yigeng (2012)A missile during air carriage is subjected to high vibratory forces. These forces consequently impose high levels of stress on the attachment points to the aircraft. A repetitive application of stress causes fatigue. ...