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Bending and rotational behaviour of semi-continuous composite beams
WANG Jingfeng, LI Guoqiang
《结构与土木工程前沿(英文)》 2008年 第2卷 第2期 页码 116-122 doi: 10.1007/s11709-008-0015-9
关键词: rotational effective deflection calculation semi-continuous composite full-scale semi-rigid
Bing XIA, Yuching WU, Zhanfei HUANG
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 257-266 doi: 10.1007/s11709-012-0163-9
关键词: co-rotational total Lagrangian geometrical nonlinearity fire elasto-plastic
Biranchi PANDA,A. GARG,Zhang JIAN,Akbar HEIDARZADEH,Liang GAO
《机械工程前沿(英文)》 2016年 第11卷 第3期 页码 289-298 doi: 10.1007/s11465-016-0393-y
Friction stir welding (FSW) process has gained attention in recent years because of its advantages over the conventional fusion welding process. These advantages include the absence of heat formation in the affected zone and the absence of large distortion, porosity, oxidation, and cracking. Experimental investigations are necessary to understand the physical behavior that causes the high tensile strength of welded joints of different metals and alloys. Existing literature indicates that tensile properties exhibit strong dependence on the rotational speed, traverse speed, and axial force of the tool that was used. Therefore, this study introduces the experimental procedure for measuring tensile properties, namely, ultimate tensile strength (UTS) and tensile elongation of the welded AA 7020 Al alloy. Experimental findings suggest that a welded part with high UTS can be achieved at a lower heat input compared with the high heat input condition. A numerical approach based on genetic programming is employed to produce the functional relationships between tensile properties and the three inputs (rotational speed, traverse speed, and axial force) of the FSW process. The formulated models were validated based on the experimental data, using the statistical metrics. The effect of the three inputs on the tensile properties was investigated using 2D and 3D analyses. A high UTS was achieved, including a rotational speed of 1050 r/min and traverse speed of 95 mm/min. The results also indicate that 8 kN axial force should be set prior to the FSW process.
关键词: tensile properties ultimate tensile strength tensile elongation friction stir welding tool rotational speed genetic programming welding speed
Xiaodong JIN, Yuefa FANG, Dan ZHANG, Xueling LUO
《机械工程前沿(英文)》 2020年 第15卷 第1期 页码 66-80 doi: 10.1007/s11465-019-0570-x
关键词: parallel mechanism redundant mechanism large rotational angles machine tools 2R1T spindle head collaborative manipulator
Soft curvature sensors for measuring the rotational angles of mechanical fingers
Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN
《机械工程前沿(英文)》 2020年 第15卷 第4期 页码 610-621 doi: 10.1007/s11465-020-0596-0
关键词: soft sensor Ga-In-Sn alloy strain sensing curvature sensing mechanical finger bending
一种新型转子式陀螺的分辨率为0.47″的转子微偏转角度检测方法 Article
Hai LI, Xiao-wei LIU, Rui WENG, Hai-feng ZHANG
《信息与电子工程前沿(英文)》 2017年 第18卷 第5期 页码 591-598 doi: 10.1631/FITEE.1500454
关键词: 微角度检测;差分电容结构;转子式陀螺
Development of an analytical model to estimate the churning losses in high-speed axial piston pumps
《机械工程前沿(英文)》 2022年 第17卷 第2期 doi: 10.1007/s11465-021-0671-1
关键词: axial piston pump rotating parts high rotational speed churning losses drag torque
M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE
《机械工程前沿(英文)》 2014年 第9卷 第4期 页码 402-408 doi: 10.1007/s11465-014-0316-8
The kinematic assumptions upon which the Euler-Bernoulli beam theory is founded allow it to be extended to more advanced analysis. Simple superposition allows for three-dimensional transverse loading. Using alternative constitutive equations can allow for viscoelastic or plastic beam deformation. Euler-Bernoulli beam theory can also be extended to the analysis of curved beams, beam buckling, composite beams and geometrically nonlinear beam deflection. In this study, solving the nonlinear differential equation governing the calculation of the large rotation deviation of the beam (or column) has been discussed. Previously to calculate the rotational deviation of the beam, the assumption is made that the angular deviation of the beam is small. By considering the small slope in the linearization of the governing differential equation, the solving is easy. The result of this simplification in some cases will lead to an excessive error. In this paper nonlinear differential equations governing on this system are solved analytically by Akbari-Ganji’s method (AGM). Moreover, in AGM by solving a set of algebraic equations, complicated nonlinear equations can easily be solved and without any mathematical operations such as integration solving. The solution of the problem can be obtained very simply and easily. Furthermore, to enhance the accuracy of the results, the Taylor expansion is not needed in most cases via AGM manner. Also, comparisons are made between AGM and numerical method (Runge-Kutta 4th). The results reveal that this method is very effective and simple, and can be applied for other nonlinear problems.
关键词: AGM critical load of columns large deformations of beam nonlinear differential equation
Vibratory behaviors of Jeffcott system on cylindrical roller bearings
Hao WU, Jianwen WANG, Qi AN
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 305-309 doi: 10.1007/s11465-009-0036-7
关键词: roller bearing bearing-rotor system design value critical rotational speed
CO, N, and CO/N mixed gas injection for enhanced shale gas recovery and CO geological storage
《能源前沿(英文)》 2023年 第17卷 第3期 页码 428-445 doi: 10.1007/s11708-023-0865-9
关键词: shale gas gas injection competitive adsorption enhanced shale gas recovery CO2 geological storage
CO2 methanation and co-methanation of CO and CO2 over Mn-promoted Ni/Al2
Kechao Zhao,Zhenhua Li,Li Bian
《化学科学与工程前沿(英文)》 2016年 第10卷 第2期 页码 273-280 doi: 10.1007/s11705-016-1563-5
关键词: Mn promotion nickel catalysts CO2 methanation co-methanation of CO and CO2
An investigation of the CHOH and CO selectivity of CO hydrogenation over Cu–Ce–Zr catalysts
《化学科学与工程前沿(英文)》 2022年 第16卷 第6期 页码 950-962 doi: 10.1007/s11705-022-2162-2
关键词: CO2 hydrogenation Cu–Ce–Zr hydroxyls CO/CH3OH selectivity
《化学科学与工程前沿(英文)》 2022年 第16卷 第7期 页码 1139-1148 doi: 10.1007/s11705-021-2111-5
关键词: CO oxidation heterogeneous catalysis metal-organic framework NH2 functional group PdNi
Reduction potential of the energy penalty for CO capture in CCS
《能源前沿(英文)》 2023年 第17卷 第3期 页码 390-399 doi: 10.1007/s11708-023-0864-x
关键词: CO2 capture and storage (CCS) CO2 separation energy penalty
A coal-fired power plant integrated with biomass co-firing and CO capture for zero carbon emission
《能源前沿(英文)》 2022年 第16卷 第2期 页码 307-320 doi: 10.1007/s11708-021-0790-8
关键词: coal-fired power plant biomass co-firing CO2 capture zero carbon emission performance evaluation
标题 作者 时间 类型 操作
Implementation of total Lagrangian formulation for the elasto-plastic analysis of plane steel frames exposed to fire
Bing XIA, Yuching WU, Zhanfei HUANG
期刊论文
properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational
Biranchi PANDA,A. GARG,Zhang JIAN,Akbar HEIDARZADEH,Liang GAO
期刊论文
Design and analysis of a class of redundant collaborative manipulators with 2-dimension large rotational
Xiaodong JIN, Yuefa FANG, Dan ZHANG, Xueling LUO
期刊论文
Soft curvature sensors for measuring the rotational angles of mechanical fingers
Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN
期刊论文
Development of an analytical model to estimate the churning losses in high-speed axial piston pumps
期刊论文
Scrutiny of non-linear differential equations Euler-Bernoulli beam with large rotational deviation by
M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE
期刊论文
Vibratory behaviors of Jeffcott system on cylindrical roller bearings
Hao WU, Jianwen WANG, Qi AN
期刊论文
CO2 methanation and co-methanation of CO and CO2 over Mn-promoted Ni/Al2
Kechao Zhao,Zhenhua Li,Li Bian
期刊论文
Conversion of CO into CO by high active and stable PdNi nanoparticles supported on a metal-organic framework
期刊论文