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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: This paper investigates the influence of crack geometry, crack-face and loading conditions, and the permittivitya medium inside the crack gap play a crucial role on the behavior of intensity factors.The mode-I stress intensity factors ( ) for two representative non-planar cracks under different crack-faceconditions are found significantly different and they possess both upper and lower bounds.crack configurations considered except for of the semi-permeable penny-shaped crack.

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

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Real-time prediction of tunnel face conditions using XGBoost Random Forest algorithm

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 12,   Pages 1777-1795 doi: 10.1007/s11709-023-0044-4

Abstract: Real-time perception of rock conditions based on continuously collected data to meet the requirementsTBM loading phase is short, usually within a few minutes after the disc cutter contacts the tunnel face

Keywords： Boring Machine     fractured and weak rock mass     machine learning model     real-time early warming     tunnel face    

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Investigation of crack segmentation and fast evaluation of crack propagation, based on deep learning

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 4,   Pages 516-535 doi: 10.1007/s11709-024-1040-z

Abstract: Identifying crack and predicting crack propagation are critical processes for the risk assessment ofMost traditional approaches to crack modeling are faced with issues of high computational costs and excessiveTo address this issue, we explore the potential of deep learning (DL) to increase the efficiency of crackdetection and forecasting crack growth.present DL models for identifying cracks, especially on concrete surface images, and for predicting crack

Keywords： deep learning     crack segmentation     crack propagation     encoder−decoder     recurrent neural network    

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Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 145-160 doi: 10.1007/s11709-022-0806-4

Abstract: fiber-reinforced cementitious composites (FRCC) were applied to strengthen the concrete slabs in a concrete-faceAt the maximum crack width of 0.2 mm, the deflection of the 80-mm FRCC strengthened concrete slab was

Keywords： cementitious composites     engineered cementitious composites     sprayable     shotcrete     strengthening     concrete-face    

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Dynamic crack propagation in plates weakened by inclined cracks: an investigation based on peridynamics

A. SHAFIEI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 527-535 doi: 10.1007/s11709-018-0450-1

Abstract: In this paper by using peridynamics, the crack path for inclined crack under dynamic loading were investigatedThe peridynamics solution for this problem represents the main features of dynamic crack propagationsuch as crack bifurcation.In addition, the influence of geometry on inclined crack growth is studied.

Keywords： peridynamics     inclined crack     dynamic fracture     crack branching    

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Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 522-532 doi: 10.1007/s11709-023-0930-9

Abstract: Engineering safety during maintenance outages is determined by the stability of the tunnel face.Pressure maintenance openings are typically used under complicated hydrogeological conditions.The tunnel face is supported by a medium at the bottom of the excavation chamber and compressed air atOwing to the high risk of face failure, the necessity of support pressure when cutterhead support isDisregarding the supporting effect of the cutterhead will result in a tunnel face with underestimated

Keywords： tunnel face stability     cutterhead configuration     aperture ratio     pressure gradient     support ratio    

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Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0689-z

Abstract: However, they have not been introduced into gas face seal diagnosis tasks because of the unacceptablepresented work provides a quantitative, explainable, and feasible approach for identifying the cause of gas faceIt is also applicable to mechanical devices that face similar difficulties.

Keywords： surrogate model     gas face seal     fault diagnosis     nonlinear dynamics     tribology    

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Experimental study of face passive failure features of a shallow shield tunnel in coastal backfill sand

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 2,   Pages 252-271 doi: 10.1007/s11709-024-1059-1

Abstract: Face passive failure can severely damage existing structures and underground utilities during shallow

Keywords： tunnel face stability     passive failure     model test     support pressure     failure mode    

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Dynamic in-plane transversal normal stresses in the concrete face of CFRD

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 135-148 doi: 10.1007/s11709-018-0481-7

Abstract: Severe earthquakes can induce damages to Concrete Face Rockfill Dams (CFRDs) such as concrete crackingcomplement of a method recently developed to evaluate in-plane transversal normal stresses in the concrete faceIn the above reference, the method to evaluate the concrete face in-plane transversal normal stresses

Keywords： CFR dams     dynamic analysis     in-plane normal stresses     concrete face    

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Local uncorrelated local discriminant embedding for face recognition

Xiao-hu MA,Meng YANG,Zhao ZHANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 3,   Pages 212-223 doi: 10.1631/FITEE.1500255

Abstract: The feature extraction algorithm plays an important role in face recognition.

Keywords： Feature extraction     Local discriminant embedding     Local uncorrelated criterion     Face recognition    

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Correlation between tension softening relation and crack extension resistance in concrete

Xiufang ZHANG , Shilang XU ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 323-329 doi: 10.1007/s11709-009-0041-2

Abstract: Changes of the material fracture energy consumption with crack propagation can be described by a crackextension resistance curve, one of the fundamental fracture criteria in crack mechanics.observation of the fracture behavior in concrete was used to develop a new fracture criterion, the crackextension resistance curve, to analyze crack propagation during the entire concrete fracture processfracture process zone ahead of the stress-free crack tip.

Keywords： concrete     fracture process zone     crack extension GR resistance     tension softening curve    

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Peridynamics versus XFEM: a comparative study for quasi-static crack problems

Jinhai ZHAO, Hesheng TANG, Songtao XUE

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 548-557 doi: 10.1007/s11709-017-0434-6

Abstract: However, capturing of complex mixed-mode crack patterns has been proven to be difficult with PD.extended finite element method (XFEM) is one of the most popular methods for fracture which allows crackThe first example is crack propagation in a double notched specimen under uniaxial tension with differentcrack spacings in loading direction.

Keywords： XFEM     peridynamic     bilateral crack     parallel double cracks     nonlocal theory    

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Adsorption behavior of imidacloprid pesticide on polar microplastics under environmental conditions:

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 4, doi: 10.1007/s11783-023-1641-0

Abstract:

● Small molecular chains formed on photo-aged polylactic acid microplastics (MPs).

Keywords： Microplastics     Neonicotinoid insecticide     Photo-aging     adsorption     Environmental conditions    

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Fracture resistance on aggregate bridging crack in concrete

ZHANG Xiufang, XU Shilang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 63-70 doi: 10.1007/s11709-007-0006-2

Abstract: Utilizing the obtained load against crack opening displacement curve, the value of G at any crack extensionas well as the change of G with the crack extension is examined.It is found that G will firstly increase with the development of crack and then stay constant once theinitial crack tip opening displacement reaches the characteristic crack opening displacement w0.The results reveal that the values of G of different specimens at any crack propagation are strongly
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Study on the cohesion and adhesion of hot-poured crack sealants

Meng GUO, Yiqiu TAN, Xuesong DU, Zhaofeng LV

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 353-359 doi: 10.1007/s11709-017-0400-3

Abstract: Filling crack sealant is a main method to repair cracking of pavement.The cohesion and adhesion of crack sealant directly determine its service performance and durability.This research proposed two methods to evaluate cohesion and adhesion of crack sealant, and analyzed theThe effect of moisture on low-temperature performance of crack sealant was also be evaluated by conductingfor 24 hours will decrease the failure energy of low-temperature tension and damage the durability of crack

Keywords： crack sealant     concrete pavement     cohesion     adhesion     moisture damage    

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Title Author Date Type Operation

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

Real-time prediction of tunnel face conditions using XGBoost Random Forest algorithm

Journal Article

Investigation of crack segmentation and fast evaluation of crack propagation, based on deep learning

Journal Article

Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Journal Article

Dynamic crack propagation in plates weakened by inclined cracks: an investigation based on peridynamics

A. SHAFIEI

Journal Article

Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Journal Article

Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Journal Article

Experimental study of face passive failure features of a shallow shield tunnel in coastal backfill sand

Journal Article

Dynamic in-plane transversal normal stresses in the concrete face of CFRD

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Journal Article

Local uncorrelated local discriminant embedding for face recognition

Xiao-hu MA,Meng YANG,Zhao ZHANG

Journal Article

Correlation between tension softening relation and crack extension resistance in concrete

Xiufang ZHANG , Shilang XU ,

Journal Article

Peridynamics versus XFEM: a comparative study for quasi-static crack problems

Jinhai ZHAO, Hesheng TANG, Songtao XUE

Journal Article

Adsorption behavior of imidacloprid pesticide on polar microplastics under environmental conditions:

Journal Article

Fracture resistance on aggregate bridging crack in concrete

ZHANG Xiufang, XU Shilang

Journal Article

Study on the cohesion and adhesion of hot-poured crack sealants

Meng GUO, Yiqiu TAN, Xuesong DU, Zhaofeng LV

Journal Article