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Hole quality in longitudinal–torsional coupled ultrasonic vibration assisted drilling of carbon fiber

Guofeng MA, Renke KANG, Zhigang DONG, Sen YIN, Yan BAO, Dongming GUO

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 538-546 doi: 10.1007/s11465-020-0598-y

Abstract: The advanced longitudinal–torsional coupled ultrasonic vibration assisted drilling (LTC-UAD) method has

Keywords： longitudinal–torsional coupled     ultrasonically drilling     CFRP     thrust force     hole quality    

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Numerical investigation and analysis of heat transfer enhancement in channel by longitudinal vortex based

TAO Wenquan, WU Junmei

Frontiers in Energy 2008, Volume 2, Issue 1,   Pages 71-78 doi: 10.1007/s11708-008-0001-x

Abstract: It is found that the inherent mechanism of the heat transfer enhancement by longitudinal vortex can beThe longitudinal vortex improves the field synergy of the large downstream region of longitudinal vortexThus, longitudinal vortex can enhance the integral heat transfer of the flow field, while transverse

Keywords： inherent mechanism     integral     surface     rectanglar     longitudinal    

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Mechanism of self-excited torsional vibration of locomotive driving system

Jianxin LIU, Huaiyun ZHAO, Wanming ZHAI

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 465-469 doi: 10.1007/s11465-010-0115-9

Abstract: A single wheelset drive model and 2-DOFs torsional vibration model were established to investigate theself-excited torsional vibration of a locomotive driving system.The simulation results indicate that the self-excited torsional vibration occurs when the steady slip

Keywords： locomotive     driving system     self-excited torsional vibration     mechanism     influence factor    

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Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes

Masoud MASOUMI,Mehdi MASOUMI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 142-149 doi: 10.1007/s11465-014-0292-z

Abstract: developed, and it is used to model the carbon nanotubes with the aim of the investigating into their longitudinal

Keywords： continuum theory     differential quadrature method     nanorod     longitudinal vibration    

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Experimental investigation and design of aluminum columns with longitudinal welds

Yun WU, Qilin ZHANG

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 366-373 doi: 10.1007/s11709-011-0101-2

Abstract: This paper presents an experimental investigation of longitudinally welded aluminum alloy I-section columns subjected to pure axial compression. The specimens were fabricated using 6061-T6 heat-treated aluminum alloy. The test program included 20 column tests which were separated into 2 test series of different types of welding sections. Each test series contained 10 columns. All the specimens were welded using the Tungsten Inert Gas welding method. The length of the specimens ranged from 442 to 2433 mm in order to obtain a column curve for each test series. The observed failure mode for the column tests includes mainly flexural buckling around the minor axis and the major axis by applying support except for one column (ZP1217-1) which buckled in the local zone and some columns which failed in the weld. The test strengths were compared with the design strengths predicted by the European Code and China Code for aluminum structures. The purpose of this paper is to present the tests results of two typically longitudinally welded I-section columns, and to check the accuracy of the design rules in the current specifications.

Keywords： aluminum alloy     longitudinal weld     heat-affected zone (HAZ)     reduced strength zone (RSZ)     buckling     column    

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Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 163-175 doi: 10.1007/s11709-014-0272-8

Abstract: This paper presents an investigation on the flexural-torsional buckling behavior of aluminum alloy beamsunder concentrated loads, the failure pattern, load-deformation curves, bearing capacity and flexural-torsionalIt is found that all the beam specimens collapsed in the flexural-torsional buckling with excessive deformationMoreover, the span, loading location and slenderness ratio influence the flexural-torsional bucklingSecondly, besides the experiments, a finite element method (FEM) analysis on the flexural-torsional buckling

Keywords： flexural-torsional buckling     aluminum alloy beams (AAB)     finite element method (FEM)     theoretical formula    

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Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 37-52 doi: 10.1007/s11709-022-0920-3

Abstract: The existing shield tunnel is regarded as a Timoshenko beam with longitudinal joints.The opening and relative dislocation of the longitudinal joints can be calculated using Dirac delta functionsThe effects of the stiffness reduction at the longitudinal joints (α and β), the shearingmethod is suitable for simulating the discontinuous mechanical behaviors of existing shield tunnels with longitudinal

Keywords： tunnel–soil interaction     discontinuous analysis     longitudinal joints     existing shield tunnel     Timoshenko    

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A novel structural modification to eliminate the early coupling between bending and torsional mode shapes

Nazim Abdul NARIMAN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 131-142 doi: 10.1007/s11709-016-0376-4

Abstract: structural modification approach has been adopted to eliminate the early coupling between the bending and torsionalBoth vertical and torsional displacements are calculated at the mid span of the deck to analyze boththe bending and the torsional stiffness of the system before and after the structural modification.Furthermore, the coupling between the vertical and torsional mode shapes has been removed to larger naturalThe novel structural approach manifested great efficiency in increasing vertical and torsional stiffness

Keywords： aeroelastic instability     structural damping     flutter wind speed     bending stiffness     torsional stiffness    

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An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 293-297 doi: 10.1007/s11709-007-0038-7

Abstract: In this paper, an analytical method is proposed for calculating torsional constants for complicated thin-walledAfter changing the form of the equations and combining these two unknowns into one, torsional functionAll the torsional functions can be easily obtained from these homogeneous linear equations, and torsionalconstants can be easily obtained from the torsional functions.The advantage of this method is that we can easily and directly obtain torsional constants from the torsional

Keywords： homogeneous     complicated thin-walled     numerical example     advantage     torsional function    

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Flexural and longitudinal shear performance of precast lightweight steel–ultra-high performance concrete

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 704-721 doi: 10.1007/s11709-023-0941-6

Abstract: In this study, the flexural and longitudinal shear performances of two types of precast lightweight steel–ultra-highResults show that the longitudinal shear force of the CUS is greater than that of the NUS, whereas theparameters of the CUS, a parametric study is conducted to investigate their effects on the flexural and longitudinal

Keywords： precast steel–UHPC composite beam     flexural performance     longitudinal shear performance     parametric study    

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Range of ecological impact of highway construction in the Longitudinal Range-Gorge Region, China

Jie LIU, Fan CHEN, Haiqing GENG, Xinxin QIU, Binbin CAI,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 3,   Pages 349-360 doi: 10.1007/s11783-010-0027-2

Abstract: highway (from Dali to Baoshan) and the Sixiao highway (from Simao to Xiaomengyang) passing through the Longitudinal

Keywords： range of impact     quantitative analysis     highway construction     Longitudinal Range-Gorge Region    

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Lateral-torsional buckling capacity assessment of web opening steel girders by artificial neural networks

Yasser SHARIFI,Sajjad TOHIDI

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 167-177 doi: 10.1007/s11709-014-0236-z

Abstract: A three-dimensional (3D) finite element (FE) model using ABAQUS for the elastic flexural torsional analysisnetwork (ANN) approach has been also employed to derive empirical formulae for predicting the lateral-torsional

Keywords： steel I-beams     lateral-torsional buckling     finite element (FE) method     artificial neural network (ANN) approach    

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Proposing two new methods to decrease lateral-torsional buckling in reduced beam section connections

Samira EBRAHIMI; Nasrin BAKHSHAYESH EGHBALI; Mohammad Mehdi AHMADI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1581-1598 doi: 10.1007/s11709-022-0886-1

Abstract: Reduced web section (RWS) connections can prevent lateral-torsional buckling and web local buckling experiencedAccording to the results, RBS-ST and RW-RBS connections can decrease or even eliminate lateral-torsional

Keywords： RBS     RBS-ST     RW-RBS     lateral-torsional buckling     cyclic performance    

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Innovative hybrid reinforcement constituting conventional longitudinal steel and FRP stirrups for improved

Mostafa FAKHARIFAR,Ahmad DALVAND,Mohammad K. SHARBATDAR,Genda CHEN,Lesley SNEED

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1,   Pages 44-62 doi: 10.1007/s11709-015-0295-9

Abstract: The hybrid reinforcement consists of conventional longitudinal steel reinforcement and FRP stirrups.strength and ductility owing to the considerable confining pressure provided by the FRP stirrups to the longitudinal

Keywords： FRP     ductility     confinement     seismic     shear    

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Numerical analysis on heat transfer enhancement by longitudinal vortex based on field synergy principle

WU Junmei, TAO Wenquan

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 365-369 doi: 10.1007/s11708-007-0055-1

Abstract: basis of the field synergy principle to explain the inherent mechanism of heat transfer enhancement by longitudinal

Keywords： computational     inherent mechanism     staggered     decrease     transfer surface    

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Title Author Date Type Operation

Hole quality in longitudinal–torsional coupled ultrasonic vibration assisted drilling of carbon fiber

Guofeng MA, Renke KANG, Zhigang DONG, Sen YIN, Yan BAO, Dongming GUO

Journal Article

Numerical investigation and analysis of heat transfer enhancement in channel by longitudinal vortex based

TAO Wenquan, WU Junmei

Journal Article

Mechanism of self-excited torsional vibration of locomotive driving system

Jianxin LIU, Huaiyun ZHAO, Wanming ZHAI

Journal Article

Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes

Masoud MASOUMI,Mehdi MASOUMI

Journal Article

Experimental investigation and design of aluminum columns with longitudinal welds

Yun WU, Qilin ZHANG

Journal Article

Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Journal Article

Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Journal Article

A novel structural modification to eliminate the early coupling between bending and torsional mode shapes

Nazim Abdul NARIMAN

Journal Article

An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Journal Article

Flexural and longitudinal shear performance of precast lightweight steel–ultra-high performance concrete

Journal Article

Range of ecological impact of highway construction in the Longitudinal Range-Gorge Region, China

Jie LIU, Fan CHEN, Haiqing GENG, Xinxin QIU, Binbin CAI,

Journal Article

Lateral-torsional buckling capacity assessment of web opening steel girders by artificial neural networks

Yasser SHARIFI,Sajjad TOHIDI

Journal Article

Proposing two new methods to decrease lateral-torsional buckling in reduced beam section connections

Samira EBRAHIMI; Nasrin BAKHSHAYESH EGHBALI; Mohammad Mehdi AHMADI

Journal Article

Innovative hybrid reinforcement constituting conventional longitudinal steel and FRP stirrups for improved

Mostafa FAKHARIFAR,Ahmad DALVAND,Mohammad K. SHARBATDAR,Genda CHEN,Lesley SNEED

Journal Article

Numerical analysis on heat transfer enhancement by longitudinal vortex based on field synergy principle

WU Junmei, TAO Wenquan

Journal Article