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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: stress concentration factors obtained from complex finite element analysis.To improve the efficiency of the approach, the notch stress concentration factors for three typical fatigue-crackingconcentration factors.concentration factors.The 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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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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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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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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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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Development of mix design method based on statistical analysis of different factors for geopolymer concrete

Paramveer SINGH; Kanish KAPOOR

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 10,   Pages 1315-1335 doi: 10.1007/s11709-022-0853-x

Abstract: In this method, different factors, including binder content, alkali/binder ratio, NS/NH ratio (sodium

Keywords： geopolymer concrete     mix design     fly ash     response surface methodology     compressive strength     stress−    

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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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Investigation of Generalized SIFs of cracks in 3D piezoelectric media under various crack-face conditions

Jaroon RUNGAMORNRAT, Bounsana CHANSAVANG, Weeraporn PHONGTINNABOOT, Chung Nguyen VAN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 280-298 doi: 10.1007/s11709-019-0586-7

Abstract: factors.factors.The mode-I stress intensity factors ( ) for two representative non-planar cracks under different crack-faceThe stress/electric intensity factors predicted by permeable and energetically consistent models are,Also, the permittivity of a medium inside the crack gap strongly affects the intensity factors for all

Keywords： crack-face conditions     intensity factors     non-flat cracks     permittivity     piezoelectric media     SGBEM    

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Global sensitivity analysis of certain and uncertain factors for a circular tunnel under seismic action

Nazim Abdul NARIMAN, Raja Rizwan HUSSAIN, Ilham Ibrahim MOHAMMAD, Peyman KARAMPOUR

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1289-1300 doi: 10.1007/s11709-019-0548-0

Abstract: There are many certain and uncertain design factors which have unrevealed rational effects on the generationIn this research paper, we have dedicated three certain and four uncertain design factors to quantifyMain effects and interaction effects between the design factors have been determined supporting on variance-based

Keywords： shear waves     Sobol’s sensitivity indices     maximum principal stress     maximum overall displacement     tensile    

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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 intensitystructural energy savings are not the main factor, they are still a key factor for the decrease in energy intensityresidential energy savings are still a stable driver of momentum for the decline in China’s 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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Does financial development lower energy intensity?

Philip Kofi ADOM, Michael Owusu APPIAH, Mawunyo Prosper AGRADI

Frontiers in Energy 2020, Volume 14, Issue 3,   Pages 620-634 doi: 10.1007/s11708-019-0619-x

Abstract: However, the empirical evidence on the relationship between financial development and energy intensityGhana, this study provides an empirical answer to the question: does financial development lower energy intensityGenerally, the evidence revealed that financial development lowers energy intensity.

Keywords： financial development     energy intensity     energy efficiency     Ghana    

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Title Author Date Type Operation

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

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

Intensity Theory and Test Verification

Liu Dabin,Han Wenba,Cai Bingqing and Han Xiaodong

Journal Article

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

Liu Chuanfeng,Tian Aiqin

Journal Article

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

Longchao DAI, Xinwei WANG

Journal Article

Development of mix design method based on statistical analysis of different factors for geopolymer concrete

Paramveer SINGH; Kanish KAPOOR

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

Investigation of Generalized SIFs of cracks in 3D piezoelectric media under various crack-face conditions

Jaroon RUNGAMORNRAT, Bounsana CHANSAVANG, Weeraporn PHONGTINNABOOT, Chung Nguyen VAN

Journal Article

Global sensitivity analysis of certain and uncertain factors for a circular tunnel under seismic action

Nazim Abdul NARIMAN, Raja Rizwan HUSSAIN, Ilham Ibrahim MOHAMMAD, Peyman KARAMPOUR

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

Does financial development lower energy intensity?

Philip Kofi ADOM, Michael Owusu APPIAH, Mawunyo Prosper AGRADI

Journal Article