Articles de revues : « Buckling analysi »

1

Min. « Inelastic Buckling Analysis of Frames with Semi-Rigid Joints ». Journal of Korean Society of Steel Construction 26, n^o 3 (2014) : 143. http://dx.doi.org/10.7781/kjoss.2014.26.3.143.

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Skejić, Davor, et Marija Cavor. « PARAMETRIC ANALYSIS OF THE BUCKLING RESISTANCE OF THE SILO STEEL WALL ». Elektronički časopis građevinskog fakulteta Osijek 6, n^o 10 (2 juillet 2015) : 47–57. http://dx.doi.org/10.13167/2015.10.6.

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SAOTHONG, Jariyaporn, Osamu KUWAZURU et Nobuhiro YOSHIKAWA. « 2109 Wrinkle Analysis of Human Skin Based on Linear Buckling Theory ». Proceedings of The Computational Mechanics Conference 2005.18 (2005) : 65–66. http://dx.doi.org/10.1299/jsmecmd.2005.18.65.

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Aoyama, Taiki, Hideyuki Azegami et Noriaki Kawakami. « P-31 Nonlinear buckling analysis for etiology study of idiopathic scoliosis ». Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics 2007.3 (2007) : S119. http://dx.doi.org/10.1299/jsmeapbio.2007.3.s119.

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Cao, Qing, Yang Li et Hao Zhang. « Nonlinear Buckling Analysis of Wind Turbine Towers ». Advanced Materials Research 383-390 (novembre 2011) : 6469–75. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6469.

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Wind turbine towers are belonging to towering cylinder shell structures, which are easy to appear buckling instability under wind or other complicated loads, and on which integral elastic-plastic buckling analyses have great theoretical and practical significances. This paper used large deflection nonlinear pre-buckling and Koiter initial post-buckling theories, and adopted the finite element scheme of updated integration algorithm and LDC nonlinear solution method, then analyzed the linear buckling, elastic-plastic static buckling, and post-buckling response of the towers with initial imperfections in different location and size. It has obtained that: 1) the critical load of towers with elastic-plastic buckling is much smaller than it with elastic buckling; 2) gravity has certain influence on the critical buckling load; 3) the critical buckling load is insensitive to initial imperfections, meanwhile the imperfections which located on the top or the bottom of the tower are inferior for the stability of tower.

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Yoo, Jong Ho, Sun Hee Kim, Won Chang Choi et Soon Jong Yoon. « Buckling Analysis of Pultruded Fiber Reinforced Polymer Plastic Plate : Application of Simplified Buckling Analysis ». Key Engineering Materials 753 (août 2017) : 103–8. http://dx.doi.org/10.4028/www.scientific.net/kem.753.103.

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The pultruded fiber reinforced polymer plastic (PFRP) is one of the most actively studied materials for structural member in construction industries. In this study, a buckling analysis of PFRP plate is conducted by two analysis methods. First, a buckling strength of PFRP plate is calculated by the exact orthotropic plate buckling analysis. Second, simplified buckling analysis for PFRP plate is conducted by using approximate orthotropic material properties. The approximate orthotropic material properties are geometric mean value of longitudinal and transverse material properties of original PFRP plate. As a result of buckling analysis, buckling strength of PFRP plate for each analysis method can be obtained. From the comparison between these results, advantages and disadvantages of each analysis method are discussed. In addition, it is also discussed whether the simplified buckling analysis method for PFRP plate is applicable for the design.

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Li, Bai Jian, Liang Sheng Zhu et Xin Sha Fu. « Theoretical Analysis for Local Buckling of Corrugated Steel Plate ». E3S Web of Conferences 38 (2018) : 03002. http://dx.doi.org/10.1051/e3sconf/20183803002.

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To study local buckling of Corrugated Steel Plate under concentrated loads. Through experimental tests and theorical analysis, bearing capacity and failure form of Corrugated Steel Plate were discussed. Bearing capacity of Corrugated Steel Plate associated with local buckling, which can be assumed to be composed of three parts: buckling of plane rigid frame caused by concentrated loads, buckling of roof and web caused by bending stress. These three parts were unified by buckling relevant equations, then local buckling calculation formula was obtained. Comparing with experimental results, the loads obtained by local buckling calculation formula agree with test results very well. Since the buckling calculation is independent of the material strength, the calculation formula of local buckling is reliable, it can be used to evaluate local buckling of Corrugated Steel Plate.

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Ma, Yong Bin, Tian Hu He et Bing Dong Gu. « Thermal Buckling Analysis of Cyclic Symmetry Mounting Structure ». Applied Mechanics and Materials 578-579 (juillet 2014) : 598–601. http://dx.doi.org/10.4028/www.scientific.net/amm.578-579.598.

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Buckling analysis is a technique used to determine buckling load and buckled mode shape. Buckling load is the critical load at which a structure becomes unstable while buckled mode shape is the characteristic shape associated with a structure's buckled response. In this paper, the elastic thermal buckling of a heated cyclic symmetry structure is carried out by means of finite element method. The buckling cyclic symmetry analysis is focused on a ring-strut-ring structure which is extensively used as a basic element in rotating machines. The linear eigenvalue buckling analysis is adopted to determine the buckling response with the temperature change of the structure.

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Yang, Cong Xin, Yi Xiong Liu et Bin Wang. « Buckling Analysis on Large Wind Turbine Tower ». Advanced Materials Research 512-515 (mai 2012) : 604–7. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.604.

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The buckling of 2.5MW horizontal axis wind turbine tower tube (5.8m*3.2m*95.2m) is studied by theoretical analysis and numerical simulation. The buckling critical value of tower under axial force is found by theoretical method. The buckling modal of tower under axial force, wind pressure, bending moment and lateral force is simulated by ANSYS software. The buckling of tower with opening and frame at the bottom is also simulated by ANSYS software. The results show that both load and opening have influence on buckling performance, different load and opening have different impact to buckling of tower tube.

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Ma, Yali, Zhen Gong, Liang Zhao, Yue Han et Yun Wang. « Finite Element Analysis of Buckling of Corrugated Fiberboard ». Open Mechanical Engineering Journal 8, n^o 1 (16 septembre 2014) : 257–63. http://dx.doi.org/10.2174/1874155x01408010257.

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This paper investigates the relationship between mechanical behaviors and the shape of corrugated fiberboard by means of buckling analysis, which is done by FEM (Finite Element Method). Firstly, after analyzing the structure of corrugated fiberboard, a single-wall corrugated fiberboard model was built. The buckling load was measured in the ideal condition by linear buckling analysis (eigenvalue buckling analysis). Subsequently, nonlinear buckling analysis based on single-wall corrugated fiberboard was performed using the results of the eigenvalue buckling analysis. Finally, a finite element 3-D model of four-layer and five-layer corrugated fiberboard was established using ANSYS parametric design language (APDL) to improve mechanical properties of corrugated fiberboard based on comparing different eigenvalue buckling loads.

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Yunliang, Li, Tan Huifeng, Wang Changguo et Lu Ming yu. « Membrane Buckling Patterns and Secondary Buckling Analysis ». International Journal of Space Structures 23, n^o 3 (septembre 2008) : 183–91. http://dx.doi.org/10.1260/026635108786260965.

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Bocko, Jozef, Pavol Lengvarský et Juraj Šarloši. « Buckling Analysis of Hetero-Junction Carbon Nanotubes ». Strojnícky casopis – Journal of Mechanical Engineering 68, n^o 2 (1 novembre 2018) : 9–16. http://dx.doi.org/10.2478/scjme-2018-0013.

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AbstractThe buckling analysis of carbon nanotubes without and with hetero-junctions is described in this paper. The buckling behaviour was investigated by the finite element method and the carbon nanotubes were modelled as space frame structures. The results showed that the critical buckling force depends on the dimensions of carbon nanotubes. The critical buckling forces of hetero-junction carbon nanotubes are in range between critical buckling forces of carbon nanotubes of both used diameters with the same chiralities without hetero-junction.

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Dhole, Nikhil, Omkar Waghole, Mayur Mahadik, Bhagyawan Jadhav et Dr Arun Patil. « BUCKLING ANALYSIS AND MODAL ANALYSIS OF CONNECTING ROD USED IN I.C ENGINE ». International Journal of Engineering Applied Sciences and Technology 7, n^o 6 (1 octobre 2022) : 412–19. http://dx.doi.org/10.33564/ijeast.2022.v07i06.050.

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Every vehicle that uses an internal combustion engine requires at least one connecting rod depending upon the number ovf cylinders in the engine. It undergoes high cyclic loads of the order of 108 to109 cycles, which range from high compressive loads due to combustion, to high tensile loads due to inertia. Therefore, durability of the component is of critical importance. Due to these factors the connecting rod has been the topic of research for different aspects such as production, materials, performance simulation, etc. When designing a connecting rod, one needs to pay attention to the buckling strength of the rod. The buckling strength is heavily affected by the beam section, and Johnson's buckling equation is used to estimate the buckling strength of a given beam section. Finite Element Analysis (FEA) is often used to evaluate the buckling strength of a rod that has complex changes in beam section. we will also reinforce 2 mm layer of carbon fiber on shank length of connecting rod. Again, we will perform Finite Element Analysis on carbon fiber reinforce connecting rod for finding buckling strength.

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Vanli, O. A., et P. Michaleris. « Distortion Analysis of Welded Stiffeners ». Journal of Ship Production 17, n^o 04 (1 novembre 2001) : 226–40. http://dx.doi.org/10.5957/jsp.2001.17.4.226.

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This paper presents a welding distortion analysis approach for T-stiffeners with a particular emphasis on welding-induced buckling instabilities. Two-dimensional thermomechanical welding process simulations are performed to determine the residual stress and angular distortion. This critical buckling stress along with the buckling mode and bowing distortion are computed in 3-D eigenvalue and linear stress analyses. The effects of the stiffener geometry, weld sequence, weld heat input and mechanical fixturing on the occurrence of buckling and the distortion pattern are investigated.

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Huang, Wenjun, Deli Gao et Fengwu Liu. « Buckling Analysis of Tubular Strings in Horizontal Wells ». SPE Journal 20, n^o 02 (24 juillet 2014) : 405–16. http://dx.doi.org/10.2118/171551-pa.

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Summary A new buckling equation in horizontal wells is derived on the basis of the general bending and twisting theory of rods. The boundary conditions of a long tubular string are divided into two categories: the sum of the virtual work of bending moment and shear force at the ends of tubular strings is equal to zero, and the sum of the virtual work of bending moment and shear force at the ends is not equal to zero. Buckling solutions under different boundary conditions are obtained by solving the new buckling model. For the boundary conditions of the first category, the buckling solutions are identical with previous results. For the boundary conditions of the second category, the buckling solutions are different from the results under the boundary conditions of the first category. The results indicate that buckling behaviors depend on both the axial force and the boundary conditions. Compared with previous results, buckling solutions of the new model provide a more comprehensive description of tubular-buckling behaviors.

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Esfahani, M. M. Nasr, H. Ghasemnejad et P. E. Barrington. « Experimental and Numerical Buckling Analysis of Delaminated Hybrid Composite Beam Structures ». Applied Mechanics and Materials 24-25 (juin 2010) : 393–400. http://dx.doi.org/10.4028/www.scientific.net/amm.24-25.393.

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In this paper the effect of delamination position on the critical buckling load and buckling mode of hybrid composite beams is investigated. Experimental and numerical studies are carried out to determine the buckling load of delaminated composite beams. The laminated composite beams with various laminate designs of [G90]6, [C90]8, [C0/G0]4 and [C90/G90]4 were manufactured and tested to find the critical buckling load. Three different defect positions were placed through the thickness to find three main buckling modes. It was found that delamination position and lay-up can affect the buckling mode and also the critical buckling load. By approaching the delamination position to the outer surface of the specimen the buckling load decreases. The buckling process of hybrid and non-hybrid composite beams was also simulated by finite element software ANSYS and the critical buckling loads were verified with the relevant experimental results.

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Sato, Masanobu, et Yoshitaka Umeno. « Atomistic Model Analysis of Deformation of Carbon Nanotubes under Axial Compression ». Key Engineering Materials 725 (décembre 2016) : 451–55. http://dx.doi.org/10.4028/www.scientific.net/kem.725.451.

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We carried out molecular dynamics (MD) simulation and atomistic instability (ASI) analysis with carbon nanotubes (CNTs) under axial compression to reveal the mechanism of buckling. We investigated the development of instability mode until buckling of structure. For single-walled carbon nanotubes (SWCNTs), Euler-type buckling was found in relatively thin and long nanotubes, while buckling with deformation change of cross-sectional shape (radial buckling) was found in thick and short carbon nanotubes. The crossover between the Euler-type buckling modes and radial buckling modes was clearly seen in the ASI analysis.

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Huang, Xin Lei, et Ai Min Ji. « Analysis of Nonlinear Local Buckling of Crane Telescopic Boom ». Applied Mechanics and Materials 387 (août 2013) : 197–201. http://dx.doi.org/10.4028/www.scientific.net/amm.387.197.

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The problems of nonlinear local buckling of telescopic boom of truck crane in the practical working condition were studied. The arc-length method of nonlinear buckling analysis was introduced. And the corresponding solving steps were given. Based on ANSYS software and redevelopment of ANSYS with APDL (ANSYS Parametric Design Language), the solution of critical stress of nonlinear local buckling of the boom was obtained. The critical stress values of the linear buckling and those of the nonlinear buckling of the boom were compared. The influence of different initial imperfection on the critical stresses of nonlinear local buckling of the rectangular, hexagonal and dodecagonal sectional boom was analyzed. The results indicate that the presented method can solve the problems of the nonlinear local buckling of telescopic boom of truck crane effectively.

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Ahmad, Rahbar-Ranji. « Elastic coupled buckling analysis in stiffened plates with T-bar stiffeners ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 227, n^o 6 (20 août 2012) : 1135–49. http://dx.doi.org/10.1177/0954406212458076.

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Stiffened plate buckles in different modes, including web/flange buckling, torsional buckling, plate buckling, and interactions of them. Generally, interactions of different buckling modes in stiffened plates are ignored and elastic buckling analysis of each mode is treated separately. In some design codes, to cope with interactions of different buckling modes, the influence of adjacent elements are considered as rotational springs. The main aim of this study is to compare literature- and rule-based expressions to assess the elastic buckling strength of T-bar stiffened plates and to identify the applicability of selected expressions for certain conditions. Different buckling modes and their interactions are investigated, and critical Euler stresses are evaluated. Upon comparison with given expressions and the finite element method, it is found that some of the proposed expressions are not applicable in certain conditions.

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Chen, Shu Hua, Yu Lai Han et Jian Hua Zhang. « Elastic Shear Bucking Analysis of Corrugated Web Steel Beam in the Fire ». Advanced Materials Research 255-260 (mai 2011) : 534–38. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.534.

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According to the temperature changes of corrugated webs steel beam in fire at different time, 3 different kinds of shear buckling modes and the changes of elastic buckling critical stress of corrugated web steel beam are analyzed in the fire, considering the effect of fire high temperature on structure elasticity modulus. The computed expressions of partial shear elastic critical buckling stress, elastic critical buckling stress of general buckling mode and critical stress of elastic relevant buckling in the fire are presented in the paper. Numerical results show that fire high temperature has obvious effect on elastic shear critical buckling stress changes of corrugated web steel beam.

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Slater, P. A., M. D. Pandey et A. N. Sherbourne. « Finite element analysis of buckling of corroded ship plates ». Canadian Journal of Civil Engineering 27, n^o 3 (1 juin 2000) : 463–74. http://dx.doi.org/10.1139/l99-086.

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The paper is concerned with the assessment of ship plates in which corrosion has reduced their overall thickness making them vulnerable to buckling-related failures. The uniaxial buckling of simply supported square plates is studied for several corrosion patterns, which are allowed to progressively engulf the entire plate. The finite element method is employed for computing buckling loads of corroded plates with different boundary conditions. Numerical results are presented in the form of generic plots of buckling load versus volumetric metal loss for several corrosion patterns considered in the paper. The mechanics of buckling load variations by corrosion is discussed in detail. The spatial location of the corrosion patch appears to have a significant effect on the buckling strength. It is noted that the case of uniform corrosion is not the most detrimental case, rather corrosion confined in a corner or central area appears to be more critical.Key words: ship structures, square plate, buckling load, corrosion, uniaxial compression, finite element method.

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Huang, Wenjun, Deli Gao et Yinghua Liu. « Buckling Analysis of Tubular Strings With Connectors Constrained in Vertical and Inclined Wellbores ». SPE Journal 23, n^o 02 (12 décembre 2017) : 301–27. http://dx.doi.org/10.2118/180613-pa.

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Summary A new concept is proposed in the local tubular mechanical model, which provides a more-sophisticated description of tubular mechanical behaviors from a local perspective. The principles and assumptions for the local mechanical model are presented. Under these assumptions, the mechanical behaviors of tubular strings with connectors under nonbuckling/lateral-buckling, interhelical-buckling, and intrahelical-buckling modes in vertical and inclined wellbores are studied. The critical interhelical-buckling and intrahelical-buckling loads are deduced with the assumed load-displacement curve and potential-energy factor. The contact states under every buckling mode are divided into no contact, point contact, and wrap contact, and the critical contact loads are deduced with critical contact conditions. The results of critical buckling loads, critical contact loads, contact forces, and maximum bending moments are compared, and these results are given in explicit forms for the convenience of application. The results show that buckling mode transforms from nonbuckling/lateral buckling to interhelical buckling to intrahelical buckling, and contact state transforms from no contact to point contact to wrap contact with the increase of axial force. The effects of connectors on buckling behaviors are determined by both the geometric and mechanical parameters of tubular strings with connectors. Connectors can inhibit the buckling problem and increase the axial force and torque transfer, but may increase the possibility of tubular failure. Therefore, these two effects of connectors should be considered comprehensively in the optimal design of connectors on tubular strings.

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Yin, Zhan Zhong, et Xiu Li Wang. « Hysteretic Performance Analysis of Double-Tube Buckling Restrained Braces with Contact-Ring ». Advanced Materials Research 163-167 (décembre 2010) : 681–85. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.681.

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Double-tube buckling restrained braces with contact ring is a new buckling-restrained brace (BRBs), and is a refinement of double-tube buckling restrained braces. Based on the theory of the finite element method, the finite element entity model of double-tube buckling restrained brace with contact-ring has been made. The double-tube buckling restrained braces is systematically analyzed and computed. The analysis results indicate that this kind of buckling restrained brace has good energy dissipation and restoring force characteristics, and can overcome the difficulty in connection.

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Tong, Hua, et Yongbo Shao. « Mechanical Analysis of DS in Horizontal Directional Drilling ». Applied Sciences 12, n^o 6 (19 mars 2022) : 3145. http://dx.doi.org/10.3390/app12063145.

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In recent years, trenchless horizontal directional drilling (HDD) technology has developed rapidly towards the direction of large pipe diameter and long span. During construction, the buckling deformation and large drag torque of the drillstring (DS) are the key problems restricting the development of the HDD technology. In order to understand the buckling deformation law of the DS in horizontal directional drilling engineering, as well as the transfer and the distribution of the drag torque, and the relationship between the buckling deformation and drag torque, the dynamic model of the DS system in drilling engineering is applied to HDD engineering. The dynamics model of HDD at a long distance (5200 m) is established and calculated. The research indicates (1) when the buckling deformation of the DS is small, priority should be given to reducing the friction and torsion at the bending position; (2) excessive inlet thrust is the main reason for the buckling deformation of the DS, and the smaller the hole diameter, the more serious the buckling deformation; (3) severe buckling deformation of the DS will lead to an increase in the frictional resistance at the deformed part, and even local self-locking, resulting in the inability to continue to increase the weight on bit (WOB). The research results preliminarily reveal the relationship between DS buckling deformation and drag torque in ultra-long distance HDD engineering and point out the phenomenon law of drag torque and buckling deformation, which has reference value for the development of HDD technology.

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CAI, JIANGUO, LEMING GU, YIXIANG XU, JIAN FENG et JIN ZHANG. « NONLINEAR STABILITY ANALYSIS OF HYBRID GRID SHELLS ». International Journal of Structural Stability and Dynamics 13, n^o 01 (février 2013) : 1350006. http://dx.doi.org/10.1142/s0219455413500065.

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In this paper, we investigate the buckling capacity of a hybrid grid shell, which is made of quadrangular meshes diagonally stiffened by pre-tensioned thin cables. The eigenvalue buckling, geometrical nonlinear elastic buckling and elasto-plastic buckling analyses of the hybrid structure were carried out. Then the influences of the shape and scale of imperfections on the elasto-plastic buckling loads were discussed. Also, the effects of different structural parameters, such as the rise-to-span ratio, cross-section of beams, area and pre-stress of cables and boundary conditions, on the failure load were investigated. The results show that the buckling capacity is reduced when taking into account the material nonlinearity. Furthermore, the hybrid structure is highly imperfection sensitive and the reduction of the failure load due to imperfections can be considerable. The proper shape and scale of the imperfection are also important. It is also shown that there exists an optimal rise-to-span ratio resulting in a relatively high buckling capacity for a specific span. Moreover, the enlarging of the cross-section of steel beams notably improves the stability performance of the structure. However, the area and pre-stress of cables pose small effect on the structural stability.

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Chen, Lei. « Buckling Analysis of Short Cylinders of Uniform Thickness under Uniform External Pressure ». Applied Mechanics and Materials 351-352 (août 2013) : 501–4. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.501.

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The failure of elastic perfect cylinders under uniform external pressure is caused by circumferential buckling. The effects of the cylinder length, of the restraining conditions at boundaries and of the length of the pressurized zone all have great influences on the critical buckling load. In the European Standard for Shells EN 1993-1-6 (2007), the critical circumferential buckling stress is obtained by introducing an external buckling factor which takes the influence of different boundary conditions into account. However, the restraint of the meridional rotation at boundaries was not considered separately for the factor. For short cylinders, any restraint of the boundaries affects the buckling mode and buckling strength greatly. In this paper, the effect of meridional end rotations on the buckling strength of short cylinders was studied. The pre-buckling membrane stress state given by membrane theory was assumed for all the analyses.

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Chen, Hao, Yuanming Xu, Junhao Hu et Xi Wang. « Optimization of lightweight sub-stiffened panels with buckling analysis and imperfection sensitivity analysis ». Proceedings of the Institution of Mechanical Engineers, Part G : Journal of Aerospace Engineering 233, n^o 15 (13 juin 2019) : 5507–21. http://dx.doi.org/10.1177/0954410019856782.

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On the purpose of improving the structural efficiency of stiffened panels, which is widely used in engineering, three promising layouts of sub-stiffened thin-walled structures were optimized in view of structure's initial buckling and further analyzed through post-buckling and imperfection-sensitivity analysis. The optimization tasks were carried out using an integrated framework, which is based on the multidisciplinary optimization platform Model Center and finite element method software ABAQUS. The particle swarm optimization algorithm was applied to optimize layout parameters. Three optimal sub-stiffened panels were then evaluated based on their performance on critical buckling loads and post-buckling ultimate strength under uniaxial loading. Imperfection-sensitivity analysis was also conducted to investigate the stability behavior of the proposed panels with defect. The results indicate that the introduction of sub-stiffeners into the traditional stiffened panel can achieve significant improvements on the panel's buckling loads and ultimate strength under uniaxial loading, which are favorable to expand design space for engineering structures under requirements of lightweight with high bending stiffness and bucking resistance.

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Fenu, Luigi, Eleonora Congiu, Mariangela Deligia, Gian Felice Giaccu, Alireza Hosseini et Mauro Serra. « Buckling Analysis of Piles in Multi-Layered Soils ». Applied Sciences 11, n^o 22 (11 novembre 2021) : 10624. http://dx.doi.org/10.3390/app112210624.

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Pile buckling is infrequent, but sometimes it can occur in slender piles (i.e., micropiles) driven into soils with soft layers and/or voids. Buckling analysis of piles becomes more complex if the pile is surrounded by multi-layered soil. In this case, the well-known Timoshenko’s solution for pile buckling is of no use because it refers to single-layered soils. A variational approach for buckling analysis of piles in multi-layered soils is herein proposed. The proposed method allows for the estimation of the critical buckling load of piles in any multi-layered soil and for any boundary condition, provided that the distribution of the soil coefficient of the subgrade reaction is available. An eigenvalue-eigenvector problem is defined, where each eigenvector is the set of coefficients of a Fourier series describing the second-order displaced shape of the pile, and the related buckling load is the eigenvalue, thus obtaining the effective buckling load as the minimum eigenvalue. Besides the pile deformed shape, the stiffness distribution in the multi-layered soil is also described through a Fourier series. The Rayleigh–Ritz direct method is used to identify the Fourier development coefficients describing the pile deformation. For validation, buckling analysis results were compared with those obtained from an experimental test and a finite element analysis available in the literature, which confirmed this method’s reliability.

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Li, Shun Guo, et Hui Li. « Nonlinear Buckling Analysis of Hoisting with Application to Long-Span Steel Truss ». Applied Mechanics and Materials 94-96 (septembre 2011) : 421–24. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.421.

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Nonlinear buckling analysis method using the finite element with application to Long-Span Steel Truss was studied is this paper. The finite element model of long-span complex steel truss hoisting was established and nonlinear buckling analysis of long-span complex steel truss hoisting for two hoisting points schemes was accomplished. The eigenvalues, eigenvalue buckling modes and nonlinear buckling analysis of two hoisting point’s scheme were analyzed. The results indicate that, the nonlinear buckling analysis method using the finite element is applicable approach to study the hoisting buckling problem, the buckling will be not occurring under hoisting stage only with gravity loads. The force status of long-span complex steel truss is improved under more hoisting point’s scheme and the lateral stability is strengthened.

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Ishikawa, Koichiro, et Shiro Kato. « Elastic-Plastic Dynamic Buckling Analysis of Reticular Domes Subjected to Earthquake Motion ». International Journal of Space Structures 12, n^o 3-4 (septembre 1997) : 205–15. http://dx.doi.org/10.1177/026635119701200309.

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Static and Dynamic characteristics of shell-like structures such as reticular domes vary depending on their configuration. There is, however, very little information available concerning dynamic buckling collapse or dynamic buckling analysis. This paper presents a method for dynamic buckling analysis with emphasis on dynamic buckling behaviour subjected to vertical earthquake motion. The study focuses on the elastic-plastic buckling of the members of a large dome as well as on the global shell-like buckling of the dome. Through the analyses, the efficiency of the proposed analytical method is discussed while a method for estimating collapse accelerations is proposed.

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Ren, Fushen, Baojin Wang, Lei Zhao et Anhe Zhu. « Experimental Investigation and Analysis of Dynamic Buckling of Drill String in Horizontal Well ». Shock and Vibration 2017 (2017) : 1–15. http://dx.doi.org/10.1155/2017/1658435.

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Buckling of tubulars has been the subject of many researches in the past. However, the models in previous research always followed the same assumptions: the friction and rotation effects are ignored. The assumptions are relatively far from the reality. This paper focuses on the rotational drill string in horizontal well. The differential equation of the dynamic buckling is established considering some various factors, including friction, the drill string-borehole interaction, and rotation, and the equations of the critical load of the sinusoidal buckling and the spiral buckling are derived. Furthermore, the friction curve of the drill string and the critical load of the dynamic buckling during rotation are obtained. In addition, the influence of the rotational speed on the dynamic buckling and the axis orbit of the dynamic buckling are also gained. The results show that the critical load of the sinusoidal buckling has nothing to do with the rotational speed while the amplitude and the frequency of the dynamic buckling become larger with the increase of the rotational speed, and the dynamic buckling presents a completely different state with the development of the axial load at different speed ranges.

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Suzuki, Toshiro, Toshiyuki Ogawa et Kikuo Ikarashi. « Elastic Buckling Analysis of Rigidly Jointed Single Layer Reticulated Domes with Random Initial Imperfection ». International Journal of Space Structures 7, n^o 4 (décembre 1992) : 265–73. http://dx.doi.org/10.1177/026635119200700404.

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In the present paper, the effect of imperfection on the elastic buckling load and mode shapes of externally-loaded single layer reticulated domes is investigated. The types of buckling concerned here are the general buckling, the local (dimple) buckling and the buckling of a member. As to the geometric parameter of a dome, the slenderness factor S is adopted which represents the openness and slenderness of the dome. The maximum value of the imperfection is assumed to be the normal random variable. The buckling loads are computed by the linear and the nonlinear buckling analysis using the finite element method. The statistical values are calculated by the three-points estimates method. The main points of interest are the influence of the shape and the extent of an imperfection on the buckling load.

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Alashkar, Adnan, Mohamed Elkafrawy, Rami Hawileh et Mohammad AlHamaydeh. « Buckling Analysis of Functionally Graded Materials (FGM) Thin Plates with Various Circular Cutout Arrangements ». Journal of Composites Science 6, n^o 9 (18 septembre 2022) : 277. http://dx.doi.org/10.3390/jcs6090277.

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In this paper, several analyses were conducted to investigate the buckling behavior of Functionally Graded Material (FGM) thin plates with various circular cutout arrangements. The computer model was simulated using the Finite Element (FE) software ABAQUS. The developed model was validated by the authors in previous research. A parametric analysis was employed to investigate the effect of plate thickness and circular cutout diameter on the buckling behavior of the FGM thin plates. The normalized buckling load was also calculated to compare the buckling performance of FGM plates with various dimensions. Moreover, von Mises stress analysis was examined to understand the yield capability of the FGM plates in addition to the buckling modes that show the stress distribution of the critical buckling stress. Hence, this research provides a comprehensive analysis to display the relation between the critical buckling load and the arrangement of the circular cutouts. The results show that the critical buckling load heavily depends on the dimension of the plate and the cutout size. For instance, an increase in the plate thickness and a decrease in the cutout diameter increase the critical buckling load. Moreover, the circular cutout in a horizontal arrangement exhibited the best buckling performance, and as the arrangement shifts to a vertical arrangement, the buckling performance deteriorates.

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Liu, Cai Hua, Z. H. Ye, Cong Xin Chen, Xia Ting Feng, Q. Shen et G. F. Xiao. « Mechanical Analysis of Buckling Failure of Bedding Rock Slopes ». Key Engineering Materials 326-328 (décembre 2006) : 1125–28. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1125.

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As a typical model of steep-tilt or moderate-tilt bedding rock slopes, buckling failure differs greatly from tensile or shear failure. The mechanical characteristic of buckling failure is analyzed, and the geo-mechanics model of buckling failure is put forward. The process of buckling failure includes three phases: slope terrane creep deformation, the lower of slope terrane bend deformation, and terrane structure collapse. Using pressure bar failure theory, a formulation for calculating critical load of buckling failure is developed, which shows that critical load decreases with bend length increasing. The relationship between critical slope length and bend length is analyzed. It is indicated that critical slope length decreases with bend length increasing, and that critical slope length reaches minimal value while critical load is zero. The minimal slope length can be considered as a limit value while analyzing buckling failure of bedding slope, and its calculation equation is developed.

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Bai, Xin Li, Ze Yu Wu et Wen Liang Ma. « Global Stability Analysis of Rectangle Prestressed Thin-Walled Aqueduct ». Advanced Materials Research 243-249 (mai 2011) : 5930–34. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.5930.

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According to the deformation characteristics of global side torsion buckling for rectangle thin-walled aqueduct, the critical load of side torsion buckling for rectangle thin-walled aqueduct is deduced by Galerkin method. Influences of prestress and vertical deformation before buckling are considered. The variation rules of critical load are analyzed with four factors: span, flange width, ratio of height to width, thickness. The analysis results show that the aqueduct span is the biggest influence on the critical load of side torsion buckling for aqueduct; for rectangular thin-walled aqueduct, in conventional aqueduct section size and span, its critical stress of side torsion buckling is greater than concrete compressive strength design value , therefore side torsion buckling won't happen in usual aqueduct; if steel with high yield limit is used, stability check calculation must be carried out. Results and conclusions obtained can be referenced for the global stability design of thin-walled aqueduct.

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Jia, Yu Zhuo, et Yi Xuan Wang. « Large Span Double Truss Lateral Stability Analysis ». Applied Mechanics and Materials 680 (octobre 2014) : 171–74. http://dx.doi.org/10.4028/www.scientific.net/amm.680.171.

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The effects of large-span truss geometry of the double-plane stable orthogonal design. The use of finite element analysis software Midas double space truss were linear buckling analysis and nonlinear buckling analysis, research process and through its buckling load - examine issues outside of the structure of the plane stable displacement curve. For double truss draw some outside reference plane stability study conclusions.

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Gu, Jinpeng, Yixiao Qin, Haibiao Gao, Yue Yan, Junle Yang, Kaiyao Yang et Chenghong Mi. « Nonlinear buckling analysis of tower crane structure based on movable boundaries ». Advances in Mechanical Engineering 14, n^o 11 (novembre 2022) : 168781322211383. http://dx.doi.org/10.1177/16878132221138308.

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The tower crane is a typical soaring and complex frame structure, and buckling is an important factor affecting its safety and carrying capacity. Considering the special characteristics of the boundary conditions for the boom structure, a numerical analysis method based on movable boundaries is proposed in this paper. In order to demonstrate the accuracy of the method, numerical analysis and stress tests are carried out on the tower crane. The results show that the numerical results are basically consistent with the experimental results. A geometric buckling analysis for extremely severe conditions is carried out in order to understand the buckling behaviors. The failure modes and complete load-response curves obtained for the tower crane are comprehensively analyzed. A dual (geometric and material) nonlinear buckling analysis of the tower crane is then investigated. Finally, the influences of the deflection load parameters on the buckling response of the tower crane are explored. It is demonstrated that bifurcation point buckling and limiting point buckling are excited by different deflection load parameters, respectively. The proposed method can accurately predict the buckling of the tower cranes, given the coupling of structure and mechanism, to ensure the safety of giant cranes in actual engineering use.

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Arani, A. Ghorbanpour, M. Mohammadimehr, A. R. Saidi, S. Shogaei et A. Arefmanesh. « Thermal buckling analysis of double-walled carbon nanotubes considering the small-scale length effect ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 225, n^o 1 (1 janvier 2011) : 248–56. http://dx.doi.org/10.1177/09544062jmes1975.

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In this article, the buckling analysis of a double-walled carbon nanotube (DWCNT) subjected to a uniform internal pressure in a thermal field is investigated. The effects of the temperature change, the surrounding elastic medium based on the Winkler model, and the van der Waals forces between the inner and the outer tubes are considered using the continuum cylindrical shell model. The small-length scale effect is also included in the present formulation. The results show that there is a unique buckling mode corresponding to each critical buckling load. Moreover, it is shown that the non-local critical buckling load is lower than the local critical buckling load. It is concluded that, at low temperatures, the critical buckling load for the infinitesimal buckling of a DWCNT increases as the magnitude of temperature change increases whereas at high temperatures, the critical buckling load decreases with the increasing of the temperature.

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Yang, Shi Ruo, et Ye Dong Su. « The Buckling Property Analysis of Corrugated Steel Webs ». Applied Mechanics and Materials 488-489 (janvier 2014) : 505–8. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.505.

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This paper analyzed and summarized the formulas about the calculations of the corrugated steel web plate buckling, and based on a certain bridge as the engineering background, and the author calculated the related formulas of web buckling load and made comparative analysis. The result showed that the corrugated steel web related buckling should occur at the earliest.

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Zhang, Y. K., L. J. Xiao et Rui Chuan Li. « Buckling Analysis of the Hydraulic Support Column Based on ANSYS ». Advanced Materials Research 500 (avril 2012) : 434–39. http://dx.doi.org/10.4028/www.scientific.net/amr.500.434.

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The buckling of hydraulic support column is analyzed theoretically with the theory of the pressure rod stability. 3D digital model of the hydraulic support column is built with Pro/E, also buckling analysis and analogue simulation with ANSYS to the model are carried out. The critical buckling load of the column is obtained. The buckling analysis result is picked up and discussed, and compared with the theoretical calculation. The finite element analysis result is agreed with the theoretical result.

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Huang, Lihua, Bin Li et Yuefang Wang. « Computation Analysis of Buckling Loads of Thin-Walled Members with Open Sections ». Mathematical Problems in Engineering 2016 (2016) : 1–9. http://dx.doi.org/10.1155/2016/8320469.

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The computational methods for solving buckling loads of thin-walled members with open sections are not unique when different concerns are emphasized. In this paper, the buckling loads of thin-walled members in linear-elastic, geometrically nonlinear-elastic, and nonlinear-inelastic behaviors are investigated from the views of mathematical formulation, experiment, and numerical solution. The differential equations and their solutions of linear-elastic and geometrically nonlinear-elastic buckling of thin-walled members with various constraints are derived. Taking structural angle as an example, numerical analysis of elastic and inelastic buckling is carried out via ANSYS. Elastic analyses for linearized buckling and nonlinear buckling are realized using finite elements of beam and shell and are compared with the theoretical results. The effect of modeling of constraints on numerical results is studied when shell element is applied. The factors that influence the inelastic buckling load in numerical solution, such as modeling of constraint, loading pattern, adding rib, scale factor of initial defect, and yield strength of material, are studied. The noteworthy problems and their solutions in numerically buckling analysis of thin-walled member with open section are pointed out.

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Liu, Bing, Yu Lai Han et Zhen Qing Wang. « Elastic Shear Bucking Parameter Analysis of Corrugated Web Steel Beam under High Temperature ». Advanced Materials Research 557-559 (juillet 2012) : 116–19. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.116.

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Three kinds of shear buckling parameters of corrugated steel web beam under high temperature of fire in different time are analyzed and the high temperature effect on structural steel property is taken into account, the expressions of local buckling parameter, overall buckling parameter and interactive buckling parameter are proposed and their variation trends with the high temperature change are analyzed, a recommendation is proposed in order to provide more accurate predictions for the load-carrying capability status of corrugated steel web beam under high temperature, the buckling parameters variation should be unbiased estimated above all. Numerical results show that high temperature has obvious effect on the buckling parameter changes of the corrugated web steel beam.

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Kang, Huairong, Pengfei He, Cunman Zhang, Ying Dai, Zhongde Shan, Yong Zang et Hong Lv. « Tensile progressive damage and compressive postbuckling analysis of open-hole laminate composites ». Journal of Reinforced Plastics and Composites 39, n^o 17-18 (28 juin 2020) : 637–53. http://dx.doi.org/10.1177/0731684420920355.

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Laminate composites contain holes as a means of connection in industrial applications. A better understanding of the mechanical properties of open-hole components is necessary. Herein, progressive damage postbuckling analysis models are proposed for investigation of tensile damage and compressive buckling behaviors of open-hole laminate composites. The progressive damage model is based on failure criteria provided by the continuum damage mechanics model; virtual crack closure technology was employed to calculate the energy release rate for crack delamination in compressive postbuckling analysis. The models were utilized to analyze variations in the tensile and compressive mechanical properties, failure process, and buckling evolution of open-hole laminate composites using finite element analysis. The tensile failure patterns and failure processes of plies with different open-hole laminate composite angles were obtained and analyzed. Buckling characteristics, as well as the progression of buckling onset, buckling propagation, crack delamination, unstable delamination, and global buckling, were investigated. The influence of delamination crack length and crack distribution on the buckling properties of open-hole laminate composites are discussed in detail. Additionally, unstable and stable buckling characteristics were examined. The numerical results were in good agreement with theoretical and experimental results; damage initiated at the edge of a hole propagated to two sides with the onset of matrix damage, followed by fiber damage. The fiber damage of a 0°-ply led ultimately to laminate failure. The laminate with a symmetrical crack distribution showed stable buckling, whereas a short, nonsymmetrical distribution of cracks usually led to unstable buckling and delamination.

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Chryssostomidis, C., et N. A. Papadakis. « Buckling Analysis of Sandwich Shell Structures Subjected to Hydrostatic Load ». Marine Technology and SNAME News 31, n^o 02 (1 avril 1994) : 106–15. http://dx.doi.org/10.5957/mt1.1994.31.2.106.

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This paper examines the buckling phenomenon of sandwich cylindrical shell structures subjected to hydrostatic pressure. Global bifurcation buckling is considered, and the effect of discrete ring stiffeners on the critical pressure is analyzed. The local buckling problem is discussed, including the influence of the shape and the thickness of the core stiffeners on the critical load. Finally, the paper treats the sensitivity of local and global buckling on the thickness distribution between the inner and outer shells of the sandwich structure.

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Umeno, Yoshitaka, Masanobu Sato, Hiroyuki Shima et Motohiro Sato. « Atomistic Model Analysis of Buckling Behavior of Compressed Carbon Nanotubes ». Solid State Phenomena 258 (décembre 2016) : 61–64. http://dx.doi.org/10.4028/www.scientific.net/ssp.258.61.

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We carried out the atomistic structural instability (ASI) analysis with an empirical interatomic potential for carbon nanotubes (CNTs) under axial compression with the aim to reveal the mechanism of buckling. We investigated how ‘latent’ instability modes develop until one of them is activated at the structural instability. For pristine single-walled carbon nanotubes (SWCNTs), Euler-type buckling was found in relatively thin nanotubes, while buckling modes corresponding to change in the cross-sectional shape (radial buckling) were found in thick nanotubes. The crossover between the Euler-type buckling and radial buckling modes was clearly seen in the ASI analysis. While the reduction of Hessian eigenvalues in the pristine nanotubes and nanotubes with a vacancy is nearly linear until instability, rapid decrease of eigenvalues just before instability was found in models with Stone-Wales defects. This is due to localization of instability mode vectors around the defects that tends to arise before structural instability.

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Yaman, Tuğçe Sevil. « Analysis and stiffeners' design of a steel bridge girder ». Journal of Structural Engineering & ; Applied Mechanics 5, n^o 3 (30 septembre 2022) : 181–96. http://dx.doi.org/10.31462/jseam.2022.03181196.

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Plate girders are designed to carry massive loads over large spans. Flanges resist moment and web resists shear forces. Shear strength of steel girders having slender webs is much less than the yielding shear capacity. It is mainly due to the buckling of the web prior to reaching the yield strength of the material. Webs are generally reinforced with transverse stiffeners to increase their buckling strength. Stiffened webs resist shear also after buckling, which is called as post buckling strength. Tension field theories explain the formation of the post buckling strength and predict the stiffened web’s ultimate shear strength. Most design code provisions are set on tension field theories. There exists plenty of tension field theories proposed until today. This paper covers the design shear strength check and design flexural strength check and the stiffeners’ design of a steel girder specimen which was designed intentionally to fail in shear buckling. Analysis and stiffeners’ design were performed according to the provisions for load and resistance factor design (LRFD) in the ANSI/American Institute of Steel Construction (AISC) 360-16 - Specification for Structural Steel Buildings.

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Chen, Qi Feng, et Mu Yu Liu. « Buckling Analysis of Stiffened Plate with Local Imperfections under In-Plane Bending ». Applied Mechanics and Materials 351-352 (août 2013) : 290–96. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.290.

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Elastic buckling of stiffened plate with local imperfections were presented in this paper. As its difficult to analysis buckling character of the stiffened plate with local imperfections by using elastic plate theory, this paper used finite element method (FEM) to model 30 different cases of local imperfections in stiffened plate, and analysed how the size, depth and direction of local imperfections affect the critical buckling coefficient of the stiffened plate. Results shown that, the size, depth and direction of local imperfections are have significant impact to the buckling behavior of stiffened plate, the largest decrease of critical buckling coefficient due to the local imperfection reaches 30% in this paper, and the critical buckling coefficient of stiffened plate with smaller stiffness ratio is more susceptible to the local imperfections.

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Pinarbasi, Seval. « Stability Analysis of Nonuniform Rectangular Beams Using Homotopy Perturbation Method ». Mathematical Problems in Engineering 2012 (2012) : 1–18. http://dx.doi.org/10.1155/2012/197483.

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The design of slender beams, that is, beams with large laterally unsupported lengths, is commonly controlled by stability limit states. Beam buckling, also called “lateral torsional buckling,” is different from column buckling in that a beam not only displaces laterally but also twists about its axis during buckling. The coupling between twist and lateral displacement makes stability analysis of beams more complex than that of columns. For this reason, most of the analytical studies in the literature on beam stability are concentrated on simple cases: uniform beams with ideal boundary conditions and simple loadings. This paper shows that complex beam stability problems, such as lateral torsional buckling of rectangular beams with variable cross-sections, can successfully be solved using homotopy perturbation method (HPM).

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Liu, W. K., Y. J. Chen, K. Tsukimori et R. A. Uras. « Recent Advances in Dynamic Buckling Analysis of Liquid-Filled Shells ». Journal of Pressure Vessel Technology 113, n^o 2 (1 mai 1991) : 314–20. http://dx.doi.org/10.1115/1.2928760.

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The dynamic buckling of liquid-filled shells is reviewed. Comparison of the analysis with experimental results is presented. The governing equations of dynamic buckling of liquid-filled imperfect shells are then derived. A simple imperfection pattern is chosen to explain the additional buckling modes encountered in the experiments.

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Zou, Guangping, Yuyang Wang, Qichao Xue et Chunwei Zhang. « Buckling Analysis of Sandwich Plate Systems with Stiffening Ribs : Theoretical, Numerical, and Experimental Approaches ». Advances in Civil Engineering 2019 (4 mars 2019) : 1–14. http://dx.doi.org/10.1155/2019/8737561.

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This paper discusses a global buckling analysis approach for sandwich plates with stiffening ribs. The approach is based on theoretical study and is implemented by the finite element method (FEM). The equilibrium equation corresponding to critical global buckling of the sandwich plate with stiffening ribs under simple supported boundary condition is established by the energy method. The critical buckling solutions for a typical rectangular sandwich plate system (SPS) with a single stiffening rib in the longitudinal direction are then investigated while varying the potential influencing factors. The shear rigidity within the inner core exerts little effect on global buckling and can be neglected. An FEM study on elastic buckling was then conducted via ANSYS software. The advantages of the SPS were highlighted via its elastic eigenvalue buckling numerical analysis with multiple stiffeners. The ultimate buckling loads were computed similarly for different influential factors. Finally, an SPS specimen was tested in a compression test. The results showed that when the rib spacing is large, the local buckling of the plates in the grillage is controllable and the SPS is more resistant to both local and global buckling. The results based on our theoretical method agreed well with those of the FEM and experimental results.

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