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Sonic General Non-destructive Testing Technique

Chen Jimao

Strategic Study of CAE 2000, Volume 2, Issue 4,   Pages 64-69

Abstract:

This paper describes new general multi-mode non-destructive testing (NDT) of composite materials and bonded structures for detecting discontinuities (defects) , the only multi-mode one of its kinds. This technique which is based on sonic and ultrasonic testing performs five different modes of testing to detect disbond, unbond, delamination, porosity, crushed core and other defects in composite materials and bonded structures. It equally suits for applications in manufacturing, maintenance and repair of composite materials and structures which almost include them in common use now availability. Good repeatability and reliability have been found. This paper discusses the principles of the five sonic mode constitute multi-mode sonic general bondtester and demostrates the vast range of propect for general NDT from our and our internal and external comrades* much practical experinence.

Keywords： general testing     general non-destructive testing (NDT)     non-destructive testing of composite materials     mechanicalimpedance analysis (MIA)     vibration analysis (VA)     resonance testing    

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Review of pantograph and catenary interaction

Weihua ZHANG, Dong ZOU, Mengying TAN, Ning ZHOU, Ruiping LI, Guiming MEI

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 311-322 doi: 10.1007/s11465-018-0494-x

Abstract: the pantograph-catenary interaction into a moving load problem and utilizing the theory of matching mechanicalimpedance.

Keywords： electrified railway     pantograph and catenary interaction     contact force variation     moving load problem     mechanicalimpedance     multi-field    

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Inverse identification of the mechanical parameters of a pipeline hoop and analysis of the effect of

Ye GAO, Wei SUN

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 358-368 doi: 10.1007/s11465-019-0539-9

Abstract: create a dynamic model of a pipeline system effectively and analyze its vibration characteristics, the mechanicalpremise of selecting initial values reasonably, an inverse identification algorithm based on sensitivity analysisA case study was performed, and the mechanical parameters of the hoop were identified using the proposedAfter introducing the identified values into the analysis model, the reliability of the identification

Keywords： inverse identification     pipeline hoop     frequency response function     mechanical parameters     preload    

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Spectral element modeling based structure piezoelectric impedance computation and damage identification

Zhigang GUO, Zhi SUN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 4,   Pages 458-464 doi: 10.1007/s11709-011-0133-7

Abstract: This paper presents a numerical simulation study on electromechanical impedance technique for structuralThe basic principle of impedance based damage detection is structural impedance will vary with the occurrencelocation and severity of structural damage through the minimization of the deviations between structural impedance

Keywords： PZT     piezoelectric impedance     optimization     spectral element     damage identification    

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stack configuration on interface resistances in reverse electrodialysis by in situ electrochemical impedance

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-021-1480-9

Abstract:

• RED performance and stack resistance were studied by EIS and LSV.

Keywords： Reverse electrodialysis     Electrochemical impedance spectroscopy     Concentration polarization     Spacer shadow    

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Thermo-mechanical simulation of frost heave in saturated soils

Frontiers of Structural and Civil Engineering   Pages 1400-1412 doi: 10.1007/s11709-023-0990-x

Abstract: The study of frost heave requires conducting a multiphysics analysis, considering the thermal, mechanicalThis paper presents the use of a coupled thermo-mechanical approach to simulate frost heave in saturatedA function predicting porosity evolution is implemented to couple the thermal and mechanical field analysesThe results of the simulations indicate that the thermo-mechanical model captures various processes involved

Keywords： frost heave     multiphysics analysis     thermo-mechanical approach     saturated soils    

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Uncertainty assessment in hydro-mechanical-coupled analysis of saturated porous medium applying fuzzy

Farhoud KALATEH, Farideh HOSSEINEJAD

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 387-410 doi: 10.1007/s11709-019-0601-z

Abstract: dynamic response of porous media, and also to discrete the coupled dynamic equations known as - hydro-mechanicalFuzzy analysis procedure was verified, and several numerical examples were analyzed by the developedmethod, including a dynamic analysis of elastic soil column and elastic foundation under ramp loading

Keywords： fuzzy finite element method     saturated soil     hydro-mechanical coupled equations     coupled analysis     uncertaintyanalysis    

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Mechanical performance analysis and stiffness test of a new type of suspension bridge

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1160-1180 doi: 10.1007/s11709-021-0760-6

Abstract: A new type of suspension bridge is proposed based on the gravity stiffness principle. Compared with a conventional suspension bridge, the proposed bridge adds rigid webs and cross braces. The rigid webs connect the main cable and main girder to form a truss that can improve the bending stiffness of the bridge. The cross braces connect the main cables to form a closed space truss structure that can improve the torsional stiffness of the bridge. The rigid webs and cross braces are installed after the construction of a conventional suspension bridge is completed to resist different loads with different structural forms. A new type of railway suspension bridge with a span of 340 m and a highway suspension bridge with a span of 1020 m were designed and analysed using the finite element method. The stress, deflection of the girders, unbalanced forces of the main towers, and natural frequencies were compared with those of conventional suspension bridges. A stiffness test was carried out on the new type of suspension bridge with a small span, and the results were compared with those for a conventional bridge. The results showed that the new suspension bridge had a better performance than the conventional suspension bridge.

Keywords： new type of suspension bridge     stiffness test     mechanical performance     railway bridge     space truss    

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Combination form analysis and experimental study of mechanical properties on steel sheet glass fiber

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 834-850 doi: 10.1007/s11709-021-0743-7

Abstract: Three-dimensional finite element analysis was adopted to perform the combination form optimization ofdifferent steel core structures and different steel core contents based on the mechanical propertiesMechanical tests such as uniaxial tensile, shear, and compressive tests were carried out on SSGCB.Parametric analysis was conducted to investigate the influence of steel content on the mechanical properties

Keywords： steel sheet GFRP composite bar     combination form     numerical modeling     mechanical properties test     strength    

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Structural dimension optimization and mechanical response analysis of fabricated honeycomb plastic pavement

Zixuan CHEN; Tao LIU; Xiao MA; Hanyu TANG; Jianyou HUANG; Jianzhong PEI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 896-908 doi: 10.1007/s11709-022-0856-7

Abstract: Because of favorable mechanical properties, deformation resistance and being conducive to environmentalthis paper, an optimized geometry of the honeycomb pavement slab was determined through finite element analysisMechanical response of honeycomb slabs with different internal dimensions and external dimensions wereThen, the mechanical responses of this optimized fabricated plastic slab were further investigated.

Keywords： honeycomb structure     plastic pavement     dimension optimization     mechanical response     factor significance    

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Analysis of suitable geometrical parameters for designing a tendon-driven under-actuated mechanical finger

Francesco PENTA,Cesare ROSSI,Sergio SAVINO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 184-194 doi: 10.1007/s11465-016-0385-y

Abstract:

This study aims to optimize the geometrical parameters of an under-actuated mechanical finger by conductinga theoretical analysis of these parameters.

Keywords： tendon-driven fingers     mechanical finger design     under-actuated mechanical systems    

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Influence of surface modified mixed metal oxide nanoparticles on the electrochemical and mechanical properties

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 1-14 doi: 10.1007/s11705-022-2176-9

Abstract: In natural seawater, electrochemical impedance spectroscopy experiments indicated outstanding protectiverevealed by scanning electron microscopy/energy dispersive X-ray spectroscopy and X-ray diffraction analysisWhen the concentration of ATA/SiO2−TiO2 nanoparticles was 2 wt %, dynamic mechanicalanalysis revealed better mechanical properties.newly synthesised PU–ATA/SiO2–TiO2 nanocomposite provided excellent barrier and mechanical

Keywords： SiO2/TiO2 nanoparticle     nanocomposite coatings     dynamic mechanical analysis     electrochemical    

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Optimization of the mechanical performance and damage failure characteristics of laminated composites

Frontiers of Structural and Civil Engineering   Pages 1357-1369 doi: 10.1007/s11709-023-0996-4

Abstract: The influence of fiber orientation angle on the mechanical properties and stiffness degradation of theFurthermore, simulations have been conducted using finite element analysis and analytical approachesto evaluate the influence of fiber orientation on the mechanical performance of glass laminates.We also determined that increasing the fiber offset angle (i.e., 30°) could optimize the mechanical propertiesThe results of the numerical and analytical approaches demonstrated their ability to capture the mechanical

Keywords： fiber orientation     composite laminates     stiffness degradation     analytical approaches     finite element analysis    

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Fuzzy force control of constrained robot manipulators based on impedance model in an unknown environment

LIU Hongyi, WANG Fei, WANG Lei

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 168-174 doi: 10.1007/s11465-007-0028-4

Abstract: unknown environment, a control strategy based on fuzzy prediction of the reference trajectory in the impedanceThe experimental results show that the desired trajectory in the impedance model is predicted exactly

Keywords： predictive     tracking     corresponding     stiffness     algorithm    

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

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

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Title Author Date Type Operation

Sonic General Non-destructive Testing Technique

Chen Jimao

Journal Article

Review of pantograph and catenary interaction

Weihua ZHANG, Dong ZOU, Mengying TAN, Ning ZHOU, Ruiping LI, Guiming MEI

Journal Article

Inverse identification of the mechanical parameters of a pipeline hoop and analysis of the effect of

Ye GAO, Wei SUN

Journal Article

Spectral element modeling based structure piezoelectric impedance computation and damage identification

Zhigang GUO, Zhi SUN

Journal Article

stack configuration on interface resistances in reverse electrodialysis by in situ electrochemical impedance

Journal Article

Thermo-mechanical simulation of frost heave in saturated soils

Journal Article

Uncertainty assessment in hydro-mechanical-coupled analysis of saturated porous medium applying fuzzy

Farhoud KALATEH, Farideh HOSSEINEJAD

Journal Article

Mechanical performance analysis and stiffness test of a new type of suspension bridge

Journal Article

Combination form analysis and experimental study of mechanical properties on steel sheet glass fiber

Journal Article

Structural dimension optimization and mechanical response analysis of fabricated honeycomb plastic pavement

Zixuan CHEN; Tao LIU; Xiao MA; Hanyu TANG; Jianyou HUANG; Jianzhong PEI

Journal Article

Analysis of suitable geometrical parameters for designing a tendon-driven under-actuated mechanical finger

Francesco PENTA,Cesare ROSSI,Sergio SAVINO

Journal Article

Influence of surface modified mixed metal oxide nanoparticles on the electrochemical and mechanical properties

Journal Article

Optimization of the mechanical performance and damage failure characteristics of laminated composites

Journal Article

Fuzzy force control of constrained robot manipulators based on impedance model in an unknown environment

LIU Hongyi, WANG Fei, WANG Lei

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