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Senping WANG; Xiaolong LIU; Bo YUAN; Minjie SHI; Yanhui WEI
《结构与土木工程前沿(英文)》 2022年 第16卷 第9期 页码 1141-1152 doi: 10.1007/s11709-022-0866-5
关键词: torsional stiffness strength design elastic buckling space truss arches out-of-plane
Yasser SHARIFI,Sajjad TOHIDI
《结构与土木工程前沿(英文)》 2014年 第8卷 第2期 页码 167-177 doi: 10.1007/s11709-014-0236-z
关键词: steel I-beams lateral-torsional buckling finite element (FE) method artificial neural network (ANN) approach
Thermal buckling behavior of laminated composite plates: a finite-element study
Houdayfa OUNIS,Abdelouahab TATI,Adel BENCHABANE
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 41-49 doi: 10.1007/s11465-014-0284-z
In this paper, the thermal buckling behavior of composite laminated plates under a uniform temperature distribution is studied. A finite element of four nodes and 32 degrees of freedom (DOF), previously developed for the bending and mechanical buckling of laminated composite plates, is extended to investigate the thermal buckling behavior of laminated composite plates. Based upon the classical plate theory, the present finite element is a combination of a linear isoparametric membrane element and a high precision rectangular Hermitian element. The numerical implementation of the present finite element allowed the comparison of the numerical obtained results with results obtained from the literature: 1) with element of the same order, 2) the first order shear deformation theory, 3) the high order shear deformation theory and 4) the three-dimensional solution. It was found that the obtained results were very close to the reference results and the proposed element offers a good convergence speed. Furthermore, a parametrical study was also conducted to investigate the effect of the anisotropy of composite materials on the critical buckling temperature of laminated plates. The study showed that: 1) the critical buckling temperature generally decreases with the increasing of the modulus ratio EL/ET and thermal expansion ratio αT/αL, and 2) the boundary conditions and the orientation angles significantly affect the critical buckling temperature of laminated plates.
关键词: thermal buckling laminated composite plates anisotropy critical buckling temperature finite-element method high precision rectangular Hermitian element
Nicholas KEAGE, Christopher MAIOLO, Rebecca PIEROTTI, Xing MA
《结构与土木工程前沿(英文)》 2011年 第5卷 第3期 页码 335-343 doi: 10.1007/s11709-011-0121-y
关键词: compressive buckling thin steel skins unilateral contact rigid constraints
Finding buckling points for nonlinear structures by dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Hossein ESTIRI
《结构与土木工程前沿(英文)》 2020年 第14卷 第1期 页码 23-61 doi: 10.1007/s11709-019-0549-z
关键词: load factor external work dynamic relaxation static equilibrium path large displacement
Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 181-186 doi: 10.1007/s11465-013-0257-7
This paper demonstrates the application of a new multiaxial creep damage model developed by authors using stress traixiality to predict the failure time of a component made of 0.5%Cr-0.5%Mo-0.25%V low alloy steel. The model employs strain energy density and assumes that the uniaxial strain energy density of a component can be easily calculated and can be converted to multi-axial strain energy density by multiplying it to a function of stress trixiality which is a ratio of mean stress to equivalent stress. For comparison, an elastic-creep and elastic-plastic-creep finite element analysis (FEA) is performed to get multi-axial strain energy density of the component which is compared with the calculated strain energy density for both cases. The verification and application of the model are demonstrated by applying it to thin tube for which the experimental data are available. The predicted failure times by the model are compared with the experimental results. The results show that the proposed model is capable of predicting failure times of the component made of the above-mentioned material with an accuracy of 4.0%.
关键词: elastic-creep elastic-plastic-creep stress triaxiality life prediction pressure vessels finite element analysis (FEA)
Flexural-torsional buckling behavior of aluminum alloy beams
Xiaonong GUO,Zhe XIONG,Zuyan SHEN
《结构与土木工程前沿(英文)》 2015年 第9卷 第2期 页码 163-175 doi: 10.1007/s11709-014-0272-8
关键词: flexural-torsional buckling aluminum alloy beams (AAB) finite element method (FEM) theoretical formula
《结构与土木工程前沿(英文)》 页码 179-190 doi: 10.1007/s11709-022-0888-z
关键词: uncertain composite plate stochastic assume mode method Karhunen−Loève theorem polynomial chaos approach plate buckling irregularity in buckling mode shapes
Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao
《机械工程前沿(英文)》 2013年 第8卷 第3期 页码 291-297 doi: 10.1007/s11465-013-0255-9
This work presents the existence of buckling mode switching with respect to the radius of concentric rigid ring support. The buckling mode may not be axisymmetric as previously assumed. In general, the plate may buckle in an axisymmetric mode but when the radius of the ring support becomes small, the plate may buckle in an asymmetric mode. The optimum radius of the concentric rigid ring support for maximum buckling load is also determined. Introducing internal rigid ring support, when placed at an optimal position increases the elastic buckling load capacity by 149.39 percent. The numerical results obtained are in good agreement with the previously published data.
关键词: buckling circular plate elastically restrained edge rigid ring support mode switching
Experimental study on slender buckling-restrained knee braces with round steel bar cores
《结构与土木工程前沿(英文)》 2023年 第17卷 第1期 页码 99-121 doi: 10.1007/s11709-022-0875-4
关键词: weld-free beam-to-column connections moment-resisting frame cyclic and compression loading tests buckling-restrained knee brace cover tube
Nonlinear dynamic analysis for elastic robotic arms
M. H. KORAYEM, H. N. RAHIMI
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 219-228 doi: 10.1007/s11465-011-0218-y
The aim of the paper is to analyze the nonlinear dynamics of robotic arms with elastic links and joints. The main contribution of the paper is the comparative assessment of assumed modes and finite element methods as more convenient approaches for computing the nonlinear dynamic of robotic systems. Numerical simulations comprising both methods are carried out and results are discussed. Hence, advantages and disadvantages of each method are illustrated. Then, adding the joint flexibility to the system is dealt with and the obtained model is demonstrated. Finally, a brief description of the optimal motion generation is presented and the simulation is carried out to investigate the role of robot dynamic modeling in the control of robots.
关键词: robotic arms elastic link elastic joint nonlinear dynamics optimal control
拓扑优化中采用增材制造填充构件的结构屈曲荷载提升设计 Artical
Anders Clausen, Niels Aage, Ole Sigmund
《工程(英文)》 2016年 第2卷 第2期 页码 250-257 doi: 10.1016/J.ENG.2016.02.006
增材制造可实现优质多功能构件所具有的高度复杂几何构型的制备。可以直接制备内含多孔填充的结构部件是其独有特征的一个例证。现有的设计方法还难以充分利用这一设计自由度,直接获得类似结构的设计。本文将展示涂层方法 (coating approach) 的拓扑优化方法来作为多孔填充构件的设计方法,所设计的构件具有显著改进的临界屈曲载荷,从而使得整体结构部件的稳定性增强。传统的柔顺性拓扑优化方法极少在数学模型中考虑构件的屈曲约束,稳定性要求通常要经过后续的校核与改进过程满足。这一后续过程往往只能获得次优设计。本文所展示的方法弥补了传统柔顺性拓扑优化模型中难以考虑构件屈曲约束的缺陷。利用涂层拓扑优化方法与传统柔顺性拓扑优化同时对经典的MBB 梁进行设计,并采用熔丝增材制造技术对设计结果进行了制备。实验结果验证了涂层方法的数学模型的正确性。由于填充材料的性质,在相同条件下,涂层优化得到的多孔填充结构的屈曲载荷比传统优化得到的实体结构高四倍以上。
Experiments on channel columns with inclined simple edge stiffeners under compression loading
WANG Chungang, ZHANG Yaochun, ZHANG Zhuangnan
《结构与土木工程前沿(英文)》 2007年 第1卷 第3期 页码 312-321 doi: 10.1007/s11709-007-0041-z
关键词: different post-buckling strength capacity distortional buckling Furthermore
Effects of elastic support on the dynamic behaviors of the wind turbine drive train
Shuaishuai WANG, Caichao ZHU, Chaosheng SONG, Huali HAN
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 348-356 doi: 10.1007/s11465-017-0420-7
The reliability and service life of wind turbines are influenced by the complex loading applied on the hub, especially amidst a poor external wind environment. A three-point elastic support, which includes the main bearing and two torque arms, was considered in this study. Based on the flexibilities of the planet carrier and the housing, a coupled dynamic model was developed for a wind turbine drive train. Then, the dynamic behaviors of the drive train for different elastic support parameters were computed and analyzed. Frequency response functions were used to examine how different elastic support parameters influence the dynamic behaviors of the drive train. Results showed that the elastic support parameters considerably influenced the dynamic behaviors of the wind turbine drive train. A large support stiffness of the torque arms decreased the dynamic response of the planet carrier and the main bearing, whereas a large support stiffness of the main bearing decreased the dynamic response of planet carrier while increasing that of the main bearing. The findings of this study provide the foundation for optimizing the elastic support stiffness of the wind turbine drive train.
关键词: wind turbine drive train elastic support dynamic behavior frequency response function
Proposing two new methods to decrease lateral-torsional buckling in reduced beam section connections
Samira EBRAHIMI; Nasrin BAKHSHAYESH EGHBALI; Mohammad Mehdi AHMADI
《结构与土木工程前沿(英文)》 2022年 第16卷 第12期 页码 1581-1598 doi: 10.1007/s11709-022-0886-1
关键词: RBS RBS-ST RW-RBS lateral-torsional buckling cyclic performance
标题 作者 时间 类型 操作
Out-of-plane elastic buckling load and strength design of space truss arch with a rectangular section
Senping WANG; Xiaolong LIU; Bo YUAN; Minjie SHI; Yanhui WEI
期刊论文
Lateral-torsional buckling capacity assessment of web opening steel girders by artificial neural networks– elastic investigation
Yasser SHARIFI,Sajjad TOHIDI
期刊论文
Thermal buckling behavior of laminated composite plates: a finite-element study
Houdayfa OUNIS,Abdelouahab TATI,Adel BENCHABANE
期刊论文
Experimental study and numerical simulation on compressive buckling behavior of thin steel skins in unilateral
Nicholas KEAGE, Christopher MAIOLO, Rebecca PIEROTTI, Xing MA
期刊论文
Finding buckling points for nonlinear structures by dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Hossein ESTIRI
期刊论文
using strain energy density as a function of stress triaxiality under quasi-static loading employing elastic-creep& elastic-plastic-creep deformation
Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY
期刊论文
Probabilistic stability of uncertain composite plates and stochastic irregularity in their buckling mode
期刊论文
Fundamental buckling of circular plates with elastically restrained edges and resting on concentric rigid
Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao
期刊论文
Experiments on channel columns with inclined simple edge stiffeners under compression loading
WANG Chungang, ZHANG Yaochun, ZHANG Zhuangnan
期刊论文
Effects of elastic support on the dynamic behaviors of the wind turbine drive train
Shuaishuai WANG, Caichao ZHU, Chaosheng SONG, Huali HAN
期刊论文