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Stress field near circular-arc interface crack tip based on electric saturation concept

Longchao DAI, Xinwei WANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 320-325 doi: 10.1007/s11465-009-0042-9

Abstract: Explicit closed form expressions for the complex potentials in both the matrix and the inclusion, and the stressintensity factor at the crack tip are presented.

Keywords： piezoelectric material     arc crack     strip saturation     stress intensity factor    

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Mixed mode properties of CNT reinforced composites using Arcan test rig

Jacob MUTHU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 397-404 doi: 10.1007/s11709-015-0321-y

Abstract: Composite materials reinforced with carbon nanotubes were mechanical tested using Arcan test rig under Mode-I, Mode-II and mixed mode loading conditions to obtain their fracture properties. The butterfly composite specimens were fabricated with 0.02, 0.05 and 0.1 wt % CNTs. The polyester/CNT composite was fabricated using VRTM (Vacuum Resin Transfer Molding) where the CNTs were first functionalised to reach an optimum properties. Arcan test rig was designed and fabricated to work with the Shimadzu testing machine. The results show that the functionalised CNTs have improved the fracture behavior by acting as bridge between the cracked face. In addition, the fracture properties were not improved for the higher weight fraction of 0.1 wt% CNTs.

Keywords： CNT     composites     Arcan test rig     stress intensity factor    

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An investigation on prevalent strategies for XFEM-based numerical modeling of crack growth in porous media

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 914-936 doi: 10.1007/s11709-021-0750-8

Abstract: Our investigations proved that although both strategies can identically predict the stress distributionBoth strategies are reliable and highly accurate in calculating the stress intensity factor, but the

Keywords： numerical modeling     extended finite element method     porous media     crack growth     stress intensity factor    

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The formation mechanism and the influence factor of residual stress in machining

Zhaoxu QI,Bin LI,Liangshan XIONG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 265-269 doi: 10.1007/s11465-014-0311-0

Abstract: An important conclusion is drawn that the accumulated plastic strain is the main factor which determinesOn the basis of the analytical model for residual stress, a series of simulations for residual stressorder to obtain the influences of cutting speed, depth of cut and tool edge radius on surface residual stressAnd these influences are explained from the perspective of formation mechanism of residual stress in

Keywords： residual stress     analytical model     strain     plastic     cutting parameter    

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Theoretical analysis and calculation for filling factor of solar cellvarying along with illuminationintensity

Ding Jinlei,ChengXiaofang,Zhai Zaiteng,Zha Jun,Mao Meiqin

Strategic Study of CAE 2007, Volume 9, Issue 6,   Pages 82-87

Abstract: circuit current,  open circuit voltage,  maximum power current,  voltage and filling factorvarying along with the illumination intensity are deduced and calculated with two real solar cells dataThe fact that short circuit current and maximum power current are proportional to the illumination intensitycircuit voltage and maximum power voltage are proportional to the natural logarithm of illumination intensityThe relation of filling factor varying along with the illumination intensity is not a simple functional

Keywords： solar cell     illumination intensity     output characteristics     filling factor    

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Intensity Theory and Test Verification

Liu Dabin,Han Wenba,Cai Bingqing and Han Xiaodong

Strategic Study of CAE 2007, Volume 9, Issue 12,   Pages 44-52

Abstract: theories, Mohr´s intensity and a new balance particle intensity theories.other five intensity theory.This phenomenon cannot be well explained by the four classical intensity theories and Mohr’s intensityThe particle balance intensity theory clarifies the misunderstanding that if the equivalent stress isand fourth intensity theory.

Keywords： intensity theory     test results     yield     stress state    

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The Method and Formula for Stability Factor of Slope with State of Soil Original Stress

Wang Guoti

Strategic Study of CAE 2006, Volume 8, Issue 12,   Pages 80-84

Abstract: But the safety factor of stability is facing challenge in engineering application.Because of the state of original stress in soil is ignored and disfigurement of finite slice method isIn different conditions of soil consolidation, K0, the lateral stress coefficient of soilIn this paper, in consideration of the state of soil original stress, the calculating formula for safetyThere are many examples of safety factor using the formula of this paper, which have been calculated

Keywords： ateral stress coefficient K0     state of original stress     formula of safety factor of stability    

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Finite element analysis on stress and optimization for hydraulic transmission box upper case

Liu Chuanfeng,Tian Aiqin

Strategic Study of CAE 2008, Volume 10, Issue 5,   Pages 70-74

Abstract: First making three-dimension model and offering stress analysis model, then by finite element analysis

Keywords： hydraulic transmission box     mechanics model     finite element analysis     stress diagram     static intensity     fatigue intensity    

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Parametric equations for notch stress concentration factors of rib–deck welds under bending loading

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 595-608 doi: 10.1007/s11709-021-0720-1

Abstract: The effective notch stress approach for evaluating the fatigue strength of rib–deck welds requires notchstress concentration factors obtained from complex finite element analysis.First, we developed a model for investigating the effective notch stress in rib–deck welds.analysis to investigate the effects of multiple geometric parameters of a rib–deck weld on the notch stressThe notch stress concentration factors estimated from the developed formulas show agree well with the

Keywords： notch stress concentration factor     rib–deck weld     parametric analysis     regression analysis     parametric    

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On Some Important Problems About Concrete Dams

Zhu Bofang

Strategic Study of CAE 2006, Volume 8, Issue 7,   Pages 21-29

Abstract: d age is more appropriate for concrete dams than concrete class based on 28 d age . (4) The safety factorfor compressive stress for the specially heigh concrete arch dam (higher than 200 m) is some what lowin China (5) The equivalent stress in arch dams analysed by the finite element method.

Keywords： concrete dam     cracks     concrete mark     safety factor for compressive stress     equivalent stress for finite element    

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Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 165-171 doi: 10.15302/J-FASE-2017145

Abstract: The influences of different parameters such as droplet diameter, application intensity, specific powerEquations of application intensity, specific power with sprinkler irrigation time and flower injury ratioApplication intensity was also correlated with injury when the droplet diameter was larger than 1 mm.duration of sprinkler irrigation was 1, 5 and 10 min, the threshold of impinging damage of application intensity

Keywords： application intensity     damage     floriculture     flowers     specific power     sprinkler irrigation    

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Impact of inter-fuel substitution on energy intensity in Ghana

Boqiang LIN, Hermas ABUDU

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 27-41 doi: 10.1007/s11708-019-0656-5

Abstract: Energy intensity and elasticity, together with inter-fuel substitution are key issues in the currentThe current energy dynamics reveal the expected inverse relationship: higher energy intensity and lowerIt is observed further that the higher energy intensity invariably increases CO emission because approximatelyfuture scenario design was further conducted and the results were positive with growth, lower energy intensity

Keywords： energy intensity     energy elasticity     inter-fuel substitution prospects     energy contribution     Translog production    

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Dynamic mechanism for the decline of China’s energy intensity during the 11th FYP (Five-Year Plan)

Minghui LI

Frontiers in Energy 2011, Volume 5, Issue 3,   Pages 237-249 doi: 10.1007/s11708-010-0130-x

Abstract: From 2006 to 2009, the aggregate energy intensity of China fell by 14.38%, which means that China hasmade substantial progress towards its goal of achieving approximately a 20% reduction in energy intensityThis paper describes some new properties of the mechanism for the decrease in China’s energy intensityNext, although structural energy savings are not the main factor, they are still a key factor for thedecrease in energy intensity.

Keywords： energy intensity     structural energy savings     technical energy savings    

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Efficiency of scalar and vector intensity measures for seismic slope displacements

Gang WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 44-52 doi: 10.1007/s11709-012-0138-x

Abstract: Ground motion intensity measures are usually used to predict the earthquake-induced displacements inIn this study, the efficiency of various single ground motion intensity measures (scalar ) or a combinationAlthough no single intensity measure is efficient enough for all slope conditions, the spectral accelerationat 1.5 times of the initial slope period and Arias intensity of the input motion are found to be the

Keywords： seismic slope displacements     intensity measures     empirical prediction    

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A family of non-conforming crack front elements of quadrilateral and triangular types for 3D crack problems using the boundary element method

Guizhong XIE, Fenglin ZHOU, Hao LI, Xiaoyu WEN, Fannian MENG

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 332-341 doi: 10.1007/s11465-019-0540-3

Abstract: This study focuses on establishing non-conforming crack front elements of quadrilateral and triangular types for 3D crack problems when the dual boundary element method is applied. The asymptotic behavior of the physical variables in the area near the crack front is fully considered in the construction of the shape function. In the developed quadrilateral and triangular crack front elements, the asymptotic term, which captures the asymptotic behavior of the physical variable, is multiplied directly by the conventional Lagrange shape function to form a new crack front shape function. Several benchmark numerical examples that consider penny-shaped cracks and straight-edge crack problems are presented to illustrate the validity and efficiency of the developed crack front elements.

Keywords： Taylor expansion     crack front elements     stress intensity factors     dual boundary element method    

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Title Author Date Type Operation

Stress field near circular-arc interface crack tip based on electric saturation concept

Longchao DAI, Xinwei WANG

Journal Article

Mixed mode properties of CNT reinforced composites using Arcan test rig

Jacob MUTHU

Journal Article

An investigation on prevalent strategies for XFEM-based numerical modeling of crack growth in porous media

Journal Article

The formation mechanism and the influence factor of residual stress in machining

Zhaoxu QI,Bin LI,Liangshan XIONG

Journal Article

Theoretical analysis and calculation for filling factor of solar cellvarying along with illuminationintensity

Ding Jinlei,ChengXiaofang,Zhai Zaiteng,Zha Jun,Mao Meiqin

Journal Article

Intensity Theory and Test Verification

Liu Dabin,Han Wenba,Cai Bingqing and Han Xiaodong

Journal Article

The Method and Formula for Stability Factor of Slope with State of Soil Original Stress

Wang Guoti

Journal Article

Finite element analysis on stress and optimization for hydraulic transmission box upper case

Liu Chuanfeng,Tian Aiqin

Journal Article

Parametric equations for notch stress concentration factors of rib–deck welds under bending loading

Journal Article

On Some Important Problems About Concrete Dams

Zhu Bofang

Journal Article

Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Journal Article

Impact of inter-fuel substitution on energy intensity in Ghana

Boqiang LIN, Hermas ABUDU

Journal Article

Dynamic mechanism for the decline of China’s energy intensity during the 11th FYP (Five-Year Plan)

Minghui LI

Journal Article

Efficiency of scalar and vector intensity measures for seismic slope displacements

Gang WANG

Journal Article

A family of non-conforming crack front elements of quadrilateral and triangular types for 3D crack problems using the boundary element method

Guizhong XIE, Fenglin ZHOU, Hao LI, Xiaoyu WEN, Fannian MENG

Journal Article