Relevant bibliographies by topics / Buckling (Mechanics)

Academic literature on the topic 'Buckling (Mechanics)'

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Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Buckling (Mechanics)"

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Khang, Dahl-Young, John A. Rogers, and Hong H. Lee. "Mechanical Buckling: Mechanics, Metrology, and Stretchable Electronics." Advanced Functional Materials 19, no. 10 (May 22, 2009): 1526–36. http://dx.doi.org/10.1002/adfm.200801065.

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Ansari, Reza, Mahdi Mirnezhad, Hessam Rouhi, and Majid Bazdid-Vahdati. "Prediction of torsional buckling behaviour of single-walled SiC nanotubes based on molecular mechanics." Engineering Computations 32, no. 6 (August 3, 2015): 1837–66. http://dx.doi.org/10.1108/ec-10-2014-0198.

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Purpose – Based on the molecular mechanics approach, the purpose of this paper is to analytically investigate the torsional buckling behavior of single-walled silicon carbide nanotubes (SiCNTs) with different values of diameter and chiral angles. Design/methodology/approach – To this end, the mechanical properties and atomic structure of a silicon carbide (SiC) sheet are evaluated based on the density functional theory (DFT) within the framework of the generalized gradient approximation. After that force constants of the total potential energy are theoretically obtained through establishing a linkage between the viewpoints of the quantum mechanics and molecular mechanics. Explicit expressions are presented to obtain the critical buckling shear strain corresponding to different types of chirality. The present model is capable to calculate the torsional buckling behavior of SiCNTs related to various chiral angles. The critical buckling shear strain is obtained for various types of chirality and compared with each other. Findings – It is concluded that for all diameters, zigzag nanotubes are more stable than armchair ones. Besides it is found that the minimum critical buckling shear strain is for nanotubes with (n, n/2) chiral vector. Originality/value – Investigating the torsional buckling behavior of single-walled SiCNTs with different values of diameter and chiral angle. Obtaining the mechanical properties and atomic structure of the SiC sheet based on the DFT calculations. Establishing a linkage between the molecular mechanics and quantum mechanics and obtaining the force constants of the molecular mechanics. Presenting the closed-form expression to calculate the critical buckling shear strain of single-walled SiCNTs corresponding to various types of chirality.
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Krieger, Kim. "Extreme mechanics: Buckling down." Nature 488, no. 7410 (August 2012): 146–47. http://dx.doi.org/10.1038/488146a.

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Farajpour, Ali, Hamed Farokhi, and Mergen H. Ghayesh. "Mechanics of Fluid-Conveying Microtubes: Coupled Buckling and Post-Buckling." Vibration 2, no. 1 (February 26, 2019): 102–15. http://dx.doi.org/10.3390/vibration2010007.

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This paper investigates the coupled mechanics of a fluid-conveying microtube embedded inside an elastic medium and subject to a pretension. The fluid-structure interaction model of the microsystem is developed based on Lagrange’s equations for the open system of a clamped-clamped microtube. A continuation model is used to examine the nonlinear mechanics of this microsystem prior to and beyond losing stability; the growth and the response in the supercritical regime is analysed. It is shown that the microtube stays stable prior to losing stability at the so-called critical flow velocity; beyond that point, the amplitude of the buckled microsystem grows with the velocity of the flowing fluid. The effects of different system parameters such as the linear and nonlinear stiffness coefficients of the elastic medium as well as the length-scale parameter and the slenderness ratio of the microtube on the critical speeds and the post-buckling behaviour are analysed.
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Pantano, A., M. C. Boyce, and D. M. Parks. "Mechanics of Axial Compression of Single and Multi-Wall Carbon Nanotubes." Journal of Engineering Materials and Technology 126, no. 3 (June 29, 2004): 279–84. http://dx.doi.org/10.1115/1.1752926.

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A recently developed procedure for modeling the deformation of single and multi-wall carbon nanotubes [13,14] is applied to nanotube buckling and post-buckling under axial compression. Critical features of the model, which is grounded in elastic shell theory, include identification of (a) an appropriate elastic modulus and thickness pair matching both the wall stretching and bending resistances of the single atomic layer nanotube walls, and (b) a sufficiently stiff interwall van der Waals potential to preserve interwall spacing in locally buckled MWNTs, as is experimentally observed. The first issue is illustrated by parametric buckling studies on a SWNT and comparisons to a corresponding MD simulation from the literature; results clearly indicating the inadequacy of arbitrarily assigning the shell thickness to be the equilibrium spacing of graphite planes. Details of the evolution of local buckling patterns in a nine-walled CNT are interpreted based on a complex interplay of local shell buckling and evolving interwall pressure distributions. The transition in local buckling wavelengths observed with increasing post-buckling deformation is driven by the lower energy of a longer-wavelength, multiwall deformation pattern, compared to the shorter initial wavelength set by local buckling in the outermost shell. This transition, however, is contingent on adopting a van der Waals interaction sufficiently stiff to preserve interlayer spacing in the post-buckled configuration.
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LU, QIANG, and RUI HUANG. "NONLINEAR MECHANICS OF SINGLE-ATOMIC-LAYER GRAPHENE SHEETS." International Journal of Applied Mechanics 01, no. 03 (September 2009): 443–67. http://dx.doi.org/10.1142/s1758825109000228.

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The unique lattice structure and properties of graphene have drawn tremendous interests recently. By combining continuum and atomistic approaches, this paper investigates the mechanical properties of single-atomic-layer graphene sheets. A theoretical framework of nonlinear continuum mechanics is developed for graphene under both in-plane and bending deformation. Atomistic simulations are carried out to deduce the effective mechanical properties. It is found that graphene becomes highly nonlinear and anisotropic under finite-strain uniaxial stretch, and coupling between stretch and shear occurs except for stretching in the zigzag and armchair directions. The theoretical strength (fracture strain and fracture stress) of perfect graphene lattice also varies with the chiral direction of uniaxial stretch. By rolling graphene sheets into cylindrical tubes of various radii, the bending modulus of graphene is obtained. Buckling of graphene ribbons under uniaxial compression is simulated and the critical strain for the onset of buckling is compared to a linear buckling analysis.
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Garlock, Maria E. Moreyra, Spencer E. Quiel, Peter Y. Yang, Jose Alos-Moya, and Jonathan D. Glassman. "Post-Buckling Mechanics of a Square Slender Steel Plate in Pure Shear." Engineering Journal 56, no. 1 (March 31, 2019): 27–46. http://dx.doi.org/10.62913/engj.v56i1.1142.

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Thin (slender) steel plates possess shear strength beyond the elastic buckling load, which is commonly referred to as the post-buckling capacity. Semi-empirical equations based on experimental tests of plate girders have been used for decades to predict the ultimate post-buckling strength of slender webs. However, several recent studies have shown that the current models for predicting the ultimate shear post-buckling capacity of thin plates are based on some incorrect assumptions regarding their mechanical behavior. As a result, the current design equations provide an approximate estimate of capacity for the range of parameters in the test data upon which they are founded. This paper explores the fundamental behavior of thin plates under pure shear. Such a fundamental examination of shear post-buckling behavior in thin plates is needed to enable design procedures that can optimize a plate’s shear strength and load-deformation performance for a wider range of loading and design parameters. Using finite element analyses, which are validated against available results of previous experimental tests, outputs such as plastic strains, von Mises stresses, principal stresses, and principal stress directions are examined on a buckled plate acting in pure shear. The internal bending, shear, and membrane stresses in the plate’s finite elements are also evaluated. In this study, these evaluations are performed for a simply supported plate with an aspect ratio equal to 1.0 and slenderness ratio equal to 134. Results show that localized bending in the plates due to the out-of-plane post-buckling deformations appear to be a significant factor in the ultimate shear post-buckling capacity of the plate. Also, the compressive stresses continue to increase beyond the onset of elastic buckling in some regions of the plate, contrary to current design assumptions. Overall, this study provides new insights into the mechanics of shear post-buckling behavior of thin plates that can be exploited for design procedures that are consistent with mechanical behavior.
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Liu, Cai Hua, Z. H. Ye, Cong Xin Chen, Xia Ting Feng, Q. Shen, and G. F. Xiao. "Mechanical Analysis of Buckling Failure of Bedding Rock Slopes." Key Engineering Materials 326-328 (December 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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Chang-jun, Cheng, and Lui Xiao-an. "Buckling and post-buckling of annular plates in shearing, Part I: Buckling." Computer Methods in Applied Mechanics and Engineering 92, no. 2 (November 1991): 157–72. http://dx.doi.org/10.1016/0045-7825(91)90237-z.

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Zhou, Li Jun, Jian Gao Guo, and Bao Long Li. "The Theoretical Investigation on Critical Buckling Stress of Graphene Nanosheets." Materials Science Forum 859 (May 2016): 79–84. http://dx.doi.org/10.4028/www.scientific.net/msf.859.79.

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The elastic buckling behaviors of graphene nanosheets are investigated via molecular structural mechanics based finite element method. The size-and chirality-dependent critical buckling stresses of monolayer and bilayer graphene nanosheets are calculated for different geometrical dimensions and boundary constraints, respectively. By analogy with classical buckling theory of elastic plate, the analytical expressions of critical buckling stress are derived for the graphene nanosheets with different boundary constraints, and the comparisons of analytical results with the counterparts obtained by molecular structural mechanics simulation show a good consistency.
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Dissertations / Theses on the topic "Buckling (Mechanics)"

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Liu, Jia. "Buckling Induced Functionality in Soft Structures." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493413.

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A variety of instabilities can be triggered when elastic structures are subjected to mechanical loadings. While such instabilities have traditionally been considered as a failure, a new trend is emerging in which the dramatic geometric changes induced by them are harnessed to enable new functionalities. In this thesis, I report a systematic study on the morphology and functionality changes induced by buckling in soft structures. Using a combination of theoretical, numerical and experimental analyses, I investigate the non-linear response of a variety of one dimensional, two dimensional and three dimensional systems, with particular emphasis on their stability. The results show that the deformation induced by buckling can be rather complex even if the undeformed geometry is simple. Moreover, I demonstrate that a wide range of morphologies can be obtained by carefully controlling the geometric, material and loading parameters. Such tunability may open venues for the design of structures with adaptive and switchable properties.
Engineering and Applied Sciences - Engineering Sciences
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Zhang, Qiuting. "Mechanics and Functionality of Extreme Mechanical Instabilities through Buckling Driven Delamination." Diss., Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/587760.

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Mechanical Engineering
Ph.D.
Mechanical instabilities such as wrinkling and buckling-driven delamination in thin film-substrate systems have historically been considered as one of structural failure mechanisms, which should be avoided. The past decade has witnesssed rapid growth in harnessing such surface instabilities for a wide range of tunable surface related properties and functionalities, especially in soft materials on small scales. Compared to extensively studied wrinkling on soft substrates and localized buckling driven delamination on stiff substrates, the fundamental mechanics underpinning ordered buckle-delamination on soft substrate over large area and its guidance for potential implications in engineering innovation remain largely to be explored. This thesis aims to partially bridging such a knowledge gap. In this thesis, I exploit how to generate the controllable and globally periodic delaminated buckling patterns in thin films on highly prestrained elastomeric substrates, and then explore the fundamental mechanics of this spontaneous extreme buckling driven periodic delamination, as well as its implications in design of extremely stretchable electronics and interfacial mechanical properties measurement. Compared to wrinkling, one of the benefits of extremely buckling driven delamination is the extraordinarily high aspect ratio of buckles. The large surface roughness and high local curvature could potentially enable extreme surface topographies related properties, such as adhesion, wetting, friction, and optics, as well as augment the extreme stretchability in stretchable optical and electronic devices. In the aim of harnessing this extreme buckling driven delamination, I first explore the formation and evolution of extraordinarily high-aspect-ratio delaminated buckles of thin films on 400% pre-strained elastomers, as well as uncovered the underlying deformation mechanism through combining quantitative theoretical analysis and experimental and numerical approaches. A theoretical framework is developed to describe the formation and evolution process of periodic delaminated buckles, which includes three deformation stages, i.e. onset of localized blisters (Stage I), growth and propagation of delamination (Stage II), and post-buckling after delamination arrest (Stage III). I show that under extreme large compressive strain, the profile of periodic blisters changes from sinusoidal shape to jig-saw-like shape with relative high aspect ratio, which have potential applications for design of extremely stretchable electronics. Equipped with the fundamental mechanics of buckle-delamination in thin films, I then exploit harnessing the spontaneous buckling driven periodic delamination to achieve high stretchability in both metal and silicon films. Experimentally I observe periodic buckle-delaminated patterns over large area, accompanied by highly ordered transversely cracking patterns, which can be theoretically predicted by simple crack fragments model. I hypothesize that when the width of ribbons is set to be equal or smaller than the theoretically predicted crack fragment width, there would be no cracking fragmentation. This criteria for designing crack-free micro-ribbons is further validated by related experiments. Guided by the validated criteria, I successfully design crack-free and spontaneous delaminated ribbons on highly prestrained elastomer substrates, which provides a high stretchability of about 120% and 400% in Si and Au ribbons, respectively. I further extend the buckling instability-based metrology to systematically measure the mechanical properties of 2D organic conjugated polymer nano-films, which have tremendous promising applications in organic integrated circuits, solar cells, and stretchable devices. I develop a new fabrication strategy to generate buckle-delaminated free-standing organic conjugated polymeric (P3BT/C60) nanosheets. Through both experiments and theoretical analysis, I show that the free-standing buckle-delaminated organic P3BT/C60 nanosheets have significant advantages over the traditional spin-coated wrinkled nanosheets, including the enhanced mechanical properties, a higher level of stretchability with lower electrical resistance, and a wider range of controllable wettability modulation.
Temple University--Theses
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Alur, Kashyap. "Nonlinear mechanics of composite materials." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53600.

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Composite materials have been an area of active research in recent years due to the possibility of obtaining multifunctional structures. Viscoelastic layered composites with parallel plane layers consisting of a stiff constituent and a soft viscoelastic constituent are of particular interest as they have been shown to exhibit simultaneous high stiffness and high damping. Such materials would be useful in structural applications and in high vibration environments such as in a vehicle or machinery. They would provide the rigidity required while simultaneously dissipating mechanical energy. The finite deformation mechanics of parallel plane viscoelastic layered composites has not been extensively studied. Under compressive loads they are very susceptible to instabilities. Buckling, for example is an elastic instability seen in load bearing materials. Since viscoelastic materials are rate and time dependent, the buckling modes for these composites not only depend on these factors, but also on the volume fraction of the stiff constituent. Three different cases are identified in the buckling and post-buckling response of these composites: non-dilute (high volume fraction), transition (intermediate volume fraction) and dilute (small volume fraction) cases. Due to buckling from the application of prestrain, the stiffness and damping of these composites can be tuned by orders of magnitude. Adaptive and multifunctional materials can be designed taking advantage of this idea and the rate dependence of the modes of deformation.
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Mehta, Paras. "Asymptotic post-buckling analysis by Koiter's method with a general purpose finite element code." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-06082009-170924/.

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Li, Hong. "Experimental micromechanics of composite buckling strength." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/11719.

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Yang, Yongchang 1965. "Elastic-plastic buckling of infinitely long plates resting on tensionless foundations." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100237.

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There is a class of plate buckling problems in which buckling occurs in the presence of a constraining medium. This type of buckling has been investigated by many researchers, mainly as buckling of elastic columns and plates on elastic foundations. Analytical solutions have been obtained by assuming the foundation to provide tensile as well as compressive reaction forces. The present work differs from the previous ones in two respects. One, the foundation is assumed to be one-sided, thus providing only the compressive resistance. Two, the plates are allowed to be stressed in the plastic, strain-hardening range. Equations for determining the buckling stresses and wavelengths are obtained by solving the differential equations for simply supported and clamped long rectangular plates stressed uniformly in the longitudinal direction. The relevance and the usefulness of the obtained formulas is demonstrated by comparing the predicted results with the experimental results of other researchers on buckling of concrete filled steel box-section and HSS columns. It is shown that the theoretical buckling loads match quite closely with the experimental ones, and hence, should prove useful in formulating rules for the design of such columns.
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Jane, Kuo Chang. "Buckling, postbuckling deformation and vibration of a delaminated plate." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/19975.

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Burrell, Geoffrey Scott. "Distortional buckling in steel I-girders." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 143 p, 2007. http://proquest.umi.com/pqdweb?did=1338867451&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Lee, Seungsik. "Flexural-torsional buckling of pultruded T-sections." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/19496.

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Paspuleti, Suma. "Mechanical and thermal buckling of thin films." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4302.

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Thesis (M.S.)--University of Missouri-Columbia, 2005.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (July 14, 2006) Includes bibliographical references.
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Books on the topic "Buckling (Mechanics)"

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Byskov, Esben. Selected buckling problems. Lyngby, Denmark: Department of Structural Engineering, Technical University of Denmark, 1990.

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Lindberg, Herbert E. Dynamic Pulse Buckling: Theory and Experiment. Dordrecht: Springer Netherlands, 1987.

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G, Falzon B., and Aliabadi M. H, eds. Buckling and post buckling structures: Experimental, analytical and numerical studies. London: Imperial College Press, 2008.

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Shama, Mohamed. Buckling of Ship Structures. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.

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Simitses, George J. An introduction to the elastic stability of structures. Malabar, Fla: R.E. Krieger Pub. Co., 1986.

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Center, Langley Research, ed. The analysis of non-linear dynamic behavior (including snap-through) of postbuckled plates by simple analytical solution. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1988.

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Daniel, Sydow P., Librescu Liviu, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Division., eds. Postbuckling response of long thick isotropic plates loaded in compression including higher order transverse shearing effects. [Washington, DC]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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Center, Langley Research, ed. Nondimensional parameters and equations for buckling of symmetrically laminated thin elastic shallow shells. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1991.

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Center, Langley Research, ed. The analysis of non-linear dynamic behavior (including snap-through) of postbuckled plates by simple analytical solution. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1988.

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United States. National Aeronautics and Space Administration., ed. Postbuckling behavior of fiber reinforced plates and curved panels. Washington, DC: National Aeronautics and Space Administration, 1987.

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Book chapters on the topic "Buckling (Mechanics)"

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Strømmen, Einar N. "Elastic Buckling." In Structural Mechanics, 247–304. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44318-4_12.

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Audoly, Basile. "Buckling and Post-buckling of Plates." In Encyclopedia of Continuum Mechanics, 1–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-53605-6_134-1.

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Audoly, Basile. "Buckling and Post-buckling of Plates." In Encyclopedia of Continuum Mechanics, 222–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-55771-6_134.

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Kachanov, L. M. "Delamination Buckling." In Mechanics of Elastic Stability, 19–56. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2819-0_2.

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Rees, D. W. A. "Buckling of Struts." In Basic Solid Mechanics, 190–224. London: Macmillan Education UK, 1997. http://dx.doi.org/10.1007/978-1-349-14161-6_8.

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Bedford, Anthony, and Kenneth M. Liechti. "Buckling of Columns." In Mechanics of Materials, 729–81. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-22082-2_10.

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Gross, Dietmar, Werner Hauger, Jörg Schröder, Wolfgang A. Wall, and Javier Bonet. "Buckling of Bars." In Engineering Mechanics 2, 289–308. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-56272-7_7.

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Gross, Dietmar, Jörg Schröder, Javier Bonet, Werner Hauger, and Wolfgang A. Wall. "Buckling of Bars." In Engineering Mechanics 2, 287–305. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-12886-8_7.

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Byskov, Esben. "Stability: Buckling." In Solid Mechanics and Its Applications, 279–80. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-5766-0_16.

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Ross, Carl, John Bird, and Andrew Little. "The buckling of struts." In Mechanics of Solids, 319–35. 3rd ed. London: Routledge, 2021. http://dx.doi.org/10.1201/9781003128021-14.

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Conference papers on the topic "Buckling (Mechanics)"

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Monteiro, F. A. C., E. Lucena Neto, and J. A. Hernandes. "LOCAL SKIN BUCKLING OF CYLINDRICAL SHELLS." In 10th World Congress on Computational Mechanics. São Paulo: Editora Edgard Blücher, 2014. http://dx.doi.org/10.5151/meceng-wccm2012-19895.

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"Buckling analyses of compressed stiffener with finite element methods." In Engineering Mechanics 2018. Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2018. http://dx.doi.org/10.21495/91-8-373.

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Tien, Dao Minh, Nguyen Thi Cam Nhung, Do Van Thom, and Ta Duc Tam. "Thermal buckling of organic nanoplates." In The 7th International Conference on Engineering Mechanics and Automation. Publishing House for Science and Technology, 2023. http://dx.doi.org/10.15625/vap.2023.0148.

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"LATERAL-TORSIONAL BUCKLING OF WELDED SLENDER STAINLESS STEEL I BEAMS." In Engineering Mechanics 2019. Institute of Thermomechanics of the Czech Academy of Sciences, Prague, 2019. http://dx.doi.org/10.21495/71-0-363.

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Jůza, J., and M. Jandera. "DISTORTIONAL BUCKLING RESISTANCE OF THIN-WALLED PROFILES MADE OF STAINLESS STEEL." In Engineering Mechanics 2020. Institute of Thermomechanics of the Czech Academy of Sciences, Prague, 2020. http://dx.doi.org/10.21495/5896-3-258.

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"Buckling and postbuckling behaviour of stainless steel stayed double crossarm prestressed compression elements." In Engineering Mechanics 2018. Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2018. http://dx.doi.org/10.21495/91-8-681.

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Wolodko, J., and D. DeGeer. "Critical Local Buckling Conditions for Deepwater Pipelines." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92173.

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In many deepwater pipeline applications, a clear understanding of pipe local buckling behaviour due to excessive bending and/or external pressure is required to adequately design subsea pipeline systems to an acceptable degree of risk. With ultra-deepwater pipelines being considered for water depths of nearly 3000 m, pipe collapse, in many instances, will govern design. For example, bending loads imposed on the pipeline near the seabed (sagbend region) during installation will reduce the external pressure resistance of the pipeline, and this design case will influence (and generally govern) the final selection of an appropriate pipeline wall thickness. To date, the deepest operating pipelines have been laid using the J-lay method, where the pipeline departs the lay vessel in a near-vertical orientation, and the only bending condition resulting from installation is near the touchdown point in the sagbend. More recently, however, the S-lay method is being considered for installation of pipelines to water depths of nearly 2800 m. During deepwater S-lay, the pipeline originates in a horizontal orientation, bends around a stinger located at the stern or bow of the vessel, and then departs the lay vessel in a near-vertical orientation. Thus, during S-lay, the installed pipe experiences bending around the stinger (overbend region), followed by combined bending and external pressure in the sagbend region. In view of these bending and external pressure loading conditions, analytical work was performed to better understand the local buckling behaviour of thick-walled linepipe due to bending, and the influence of bending on pipe collapse. Variables considered in the analytical evaluations include pipe material properties, geometric properties, pipe thermal treatment, the definition of critical strain, and imperfections such as ovality and girth weld offset. Presented is the finite element analysis (FEA) model developed to perform the assessments, validation of the model, the results of analyses and correlations to experimental data.
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Suzuki, Nobuhisa, Ryuji Muraoka, Alan Glover, Joe Zhou, and Masao Toyoda. "Local Buckling Behavior of X100 Linepipes." In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37145.

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Local buckling behavior of API 5L X100 grade linepipes subjected to axial compression and/or bending moment is discussed in this paper based on results obtained by finite element analyses. Yield-to-tensile strength (Y/T) ratio and design factor were taken into account in the finite element analyses in order to discuss their effects on the local buckling behavior. The local bucking behavior of such lower strength linepipes as X60 and X80 grade linepipes is also discussed for comparison. Two-dimensional solid elements and four-node shell elements were used for the finite element modeling of the linepipes subjected to axial compression and bending moment, respectively. The study has improved the understanding of local buckling behavior of the X100 grade linepipes and observed the following trends. When a linepipe is subjected to axial compression, the critical axial stress decreases with increasing design factor and Y/T ratio. However, the nominal critical strain increases with increasing design factor and decreasing Y/T ratio. When a linepipe is subjected to bending moment, the critical bending moment decreases with increasing design factor and Y/T ratio. Similarly, the nominal critical strain increases with increasing design factor. However, the nominal critical strain increases with decreasing Y/T ratio when the design factor is less than and equal to 0.6 and decreases with decreasing Y/T ratio when the design factor is equal to 0.8.
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Varelis, Dimitris, and Dimitris A. Saravanos. "Nonlinear Mechanics and Buckling Analysis of Composite Shells With Embedded Piezoelectric Actuators and Sensors." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/ad-23762.

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Abstract Nonlinear mechanics for piezoelectric composite laminates and shells are presented which include nonlinear effects due to large displacements and rotations. The mechanics are incorporated into the mixed piezoelectric laminate theory. Using the mechanics, a nonlinear finite element method and an incremental solution are formulated for the nonlinear analysis of adaptive shell structures. An eight-node shell finite element is developed. The mechanics are applied to predict the buckling of laminated piezoelectric shells induced by combined electromechanical loading. Application cases quantify the mechanical buckling of composite circular beams and cylindrical panels with piezoelectric sensors, the piezoelectric buckling of active circular beams and shells, and the feasibility of active buckling compensation.
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Xue, Chun-Fang. "Buckling of nonlinear viscoelastic plate under static loading." In 2015 International Conference on Mechanics and Mechatronics (ICMM2015). WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814699143_0023.

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Reports on the topic "Buckling (Mechanics)"

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Wang. L52344 Background of Linepipe Specifications. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), December 2011. http://dx.doi.org/10.55274/r0010446.

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Some of the future pipelines are expected to be constructed in remote areas. The environment in these areas can impose higher longitudinal plastic deformation on the pipelines. Such environmental conditions include, but not limited to, frost heave and thaw settlement in the northern arctic region, seismic activity, slope instability, mine subsidence, upheaval buckling, etc. The overall industry experience for this type of loading is very limited. The other trend in new pipeline construction is the move towards higher internal pressure (design factor of 0.80 as opposed to the more traditional 0.72 for Class 1 designs) and the use of high strength linepipes (API 5L Grade X70 and higher). The ability to operate at high international pressure enhances the economic return of the pipelines and provides additional incentive to select high strength line pipe. The focus of this report is the mechanical properties of the linepipes and their influence on pipeline performance. The alloy design of steels, plate and coil rolling practice, and pipe manufacturing process can have profound effects on the resulting mechanical properties of the linepipes. The specifications of these manufacturing parameters leading to the final mechanical properties are out of the scope of this report.
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NONLINEAR FINITE ELEMENT ANALYSIS OF ALL-STEEL BUCKLING RESTRAINED BRACES. The Hong Kong Institute of Steel Construction, September 2023. http://dx.doi.org/10.18057/ijasc.2023.19.3.5.

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Buckling restrained braces are gaining popularity in earthquake-resistant designs these days. These braces give stable hysteretic behaviour with a non-buckling steel core encased in a steel tube, that is filled with concrete or mortar. However, in the last few years, researchers have observed that these braces do not need any filler material and can be all-steel. This study aims to carry out a parametric study on All-Steel Buckling Restrained Braces (ASBRBs) by varying the restraining mechanism, the amount of gap between the core and the restrainer, and loading protocols. This paper presents a parametric study conducted on 12 proposed ASBRBs through non-linear finite element analysis. The proposed models have identical inner steel core cross-sections, but the restraining mechanism differs in each case. This paper also includes an experimental study on two small-scale ASBRB specimens. In addition, a finite element study on the effect of variation in stiffness of the transition portion of the core on different performance parameters is carried out. The parameters investigated include hysteretic response, energy dissipation, compression adjustment factor, and strain hardening adjustment factor. The results indicated that the global buckling behaviour of ASBRBs is significantly influenced by the restraining mechanism. In addition, this study also revealed that the global buckling behaviour does not significantly depend on the spacing of the restrainers. It was also observed that BRBs with unstiffened cores show stable hysteretic behaviour up to 2% strain, which deteriorates with further increase in the strain.
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MECHANICAL PROPERTIES OF HGMFSST COLUMNS UNDER AXIAL COMPRESSION-EXPERIMENT AND ANALYSIS. The Hong Kong Institute of Steel Construction, December 2022. http://dx.doi.org/10.18057/ijasc.2022.18.4.10.

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High-strength grouting material (HGM) has the characteristics of early strength, high strength, high self-flow, and micro-expansion, but research on composite columns formed by steel tube and HGM is relatively scarce. Therefore, in this paper, the mechanical properties of HGM-filled square steel-tube columns (HGMFSST columns) under axial compression were experimentally studied. The main parameters included tube thickness (t) and HGM strength (fck). The test results showed that members with t = 4 mm failed due to local buckling, and members with thicker steel tube thickness failed mainly due to overall buckling. The measured and predicted ultimate bearing capacity values of the HGMFSST columns based on the existing standards of GB 50936-2014, CECS 159: 2004, AISC/ANSI 360-16, EC4, and AS/NZS 2327: 2017 were compared. The ultimate bearing capacity derived with CECS 159: 2004 was the closest to the measured values and had minimum discreteness.
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EXPERIMENTAL STUDY ON INTERACTION OF DISTORTIONAL AND GLOBAL BUCKLING OF STAINLESS STEEL LIPPED CHANNEL COLUMNS. The Hong Kong Institute of Steel Construction, June 2023. http://dx.doi.org/10.18057/ijasc.2023.19.2.7.

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This paper presents an experimental program to investigate distortional and global interaction buckling of stainless steel lipped channel columns in compression. Appropriate cross-sections and lengths were chosen so as to observe distortional-overall interaction buckling. In total, 21 buckling tests were conducted. After a brief introduction to the choice of column specimen geometries, key experimental results have been presented and discussed. The tests aim to study and observe the effect of distortional-global interactive buckling, study member under pin-ended boundary conditions, and provide benchmarks for design. Column tests were carried out with 13 position transducers monitoring displacements at key locations. A 3-D laser scanner was used to measure the imperfection shapes and magnitudes of the columns before testing. Material tests have been performed to determine the mechanical properties of stainless steel. Distortional–global interactive buckling of all columns is shown to be a failure mode. The experimental results are also used to evaluate the Australian Standard AS/NZS, North American Specification AISI, as well as formulation proposed by Becque and Rasmussen’s predictions, indicated that the Direct Strength Method (DSM) as described in AISI and AS/NZS for members undergoing distortional-overall interaction buckling are unconservative. Becque and Rasmussen’s curve is much closer to the test points than DSM in AISI and AS/NZS.
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EXPERIMENTAL STUDY ON MECHANICAL PERFORMANCE OF BUCKLING-RESTRAINED BRACE ON FRAMES WITH HIGH-STRENGTH CONCRETE-FILLED SQUARE STEEL TUBE COLUMNS. The Hong Kong Institute of Steel Construction, September 2023. http://dx.doi.org/10.18057/ijasc.2023.19.3.9.

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Using buckling-restrained braces (BRBs) in frames with high-strength concrete-filled square steel tube columns(HSCFSSTC) can solve issues such as brittle failure and low lateral stiffness. To investigate the mechanical performance of buckling-restrained brace frames(BRBFs), an experiment study was conducted. The investigation involved the design and analysis of a frame system composed of BRBs, HSCFSSTC and H-shaped steel beams. Sub-structures at a 1/3 scale with two types of connections, welded and pin connections, were subjected to pseudo-static tests. The influence of BRBF connection types on the plastic hinge formation mechanism, load-bearing capacity, energy dissipation capacity and stress magnitude of the connection gusset plates was examined. After the test, ABAQUS software was used for finite element analysis of the specimen, and the simulation results were in good agreement with the experimental results.Based on the results, both the welded and pin-connected specimens formed plastic hinges at column bases and the beam ends, which ensured the energy dissipation performance of BRBs. Pin connections were found to exhibit noticeable slippage during loading due to the presence of holes. However, the study found that the plastic hinge formation mechanism, load-bearing capacity, and lateral stiffness of the frames with the two connection types were similar. Furthermore, there was no significant difference in the load-bearing capacity, stress distribution, and magnitude between the two connection types. Nevertheless, welded connections demonstrated a greater potential for broader application as they allowed the BRB to resist horizontal seismic forces earlier than pin connections.
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INFLUENCE OF THE CORE-RESTRAINER CLEARANCE ON THE MECHANICAL PERFORMANCE OF SANDWICH BUCKLING-RESTRAINED BRACES. The Hong Kong Institute of Steel Construction, March 2020. http://dx.doi.org/10.18057/ijasc.2020.16.1.5.

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AN INVESTIGATION ON THE EFFECT OF RANDOM PITTING CORROSION ON THE STRENGTH OF THE SUBSEA PIPELINE USING MONTE CARLO METHOD. The Hong Kong Institute of Steel Construction, March 2024. http://dx.doi.org/10.18057/ijasc.2024.20.1.10.

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Pitting corrosion is normally distributed randomly along the pipeline, which is the source of the uncertainty affecting the ultimate bearing capacity of the submarine pipelines. So the Monte Carlo method is employed to study the effect of pitting corrosion on the upheaval buckling behavior of the pipeline. A corroded pipeline model with randomly distributed pitting corrosion is utilized to captures the intricate realities of corrosion scenarios. Multiple corrosion models with distinct artificial patterns have been meticulously crafted. Additionally, a new pipeline element based on Euler-Bernoulli beam theory is extended considering corroded sections, pipe-soil interactions, axial load, initial imperfections, and other major factors. Moreover, the bearing capacity, vertical deformation and section stress of the pipeline under corrosion is discussed thoroughly, wherein a Newton- Raphson typed numerical analysis procedure is utilized for nonlinear analysis of the upheaval buckling of pipelines. The influence of corrosion parameters such as the corrosion depth, corrosion ratio and area loss ratio on mechanical properties of the submarine pipelines is further analyzed in detail. It’s indicated that varying patterns of corrosion distribution, despite exhibiting identical corrosion parameters, can result in distinct reduction factors and vertical buckling displacements.
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MECHANICAL BEHAVIOR AND CATENARY ACTION OF RESTRAINED STEEL BEAM UNDER FIRE. The Hong Kong Institute of Steel Construction, September 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.8.

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To investigate the mechanical behavior and catenary action of restrained steel beam under fire, experiments were performed on five H-section restrained steel beams exposed to ISO-834 standard fire. At first, mechanical property tensile tests were performed on 3 room-temperature specimens and 8 high-temperature specimens, and variation laws of the material properties of steel materials with temperature rising were investigated by the high-temperature steady-state tests. Through the fire experiments, the temperature data, mid-span deflections and failure modes of all specimens were obtained. The experimental results show that: (1) a restrained steel beam is prone to in-plane buckling failure under fire; (2) the loading ratio n and axial restraint stiffness Kx have great influences on the catenary action of restrained steel beam under fire; (3) when the loading ratio n is constant, the greater the axial restraint stiffness Kx, the later the catenary action occurs; when the axial restraint stiffness Kx is constant, the greater the loading ratio n, the earlier the catenary action occurs.
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STUDY ON THE IMPACT CUSHIONING PERFORMANCE AND STRUCTURAL OPTIMIZATION OF A MODULAR COMPOSITE BUFFERING STRUCTURE. The Hong Kong Institute of Steel Construction, June 2024. http://dx.doi.org/10.18057/ijasc.2024.20.2.2.

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The traditional concrete rockfall shed, relying on a sand cushion for impact energy absorption, suffers from limited buffering performance, long recovery cycles, and inadequate resilience in emergency disaster prevention. To address these issues, this paper proposes a modular composite buffering structure comprising a flexible steel buffer and a sand cushion. A 500kJ impact test was conducted on the structure to investigate its mechanical behavior and rockfall cushioning performance. The test revealed the energy dissipation mechanism between the flexible steel buffer and the sand. Using the LS-DYNA platform, a FEM-DEM coupled dynamic numerical model was established to compare the cushioning performance of the buffering structure with other typical cushions. Additionally, the supports under the concrete slab and the structural layout of the flexible buffer were optimized to achieve better buffering and structural perfoemance. The research demonstrates that the composite buffering structure exhibits excellent cushioning performance, remaining intact under 500 kJ impact. Compared to sand material and EPS-sand cushion, the composite buffering structure reduces impact force by 62% and 20%, respectively. After replacing the supports under the slab by buckling corrugated tubes, the composite system is able to bear 1000kJ impact and the slab’s bearing capacity is improved. With its superior cushioning performance, the composite buffering structure shows great potential for engineering applications.
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SEISMIC BEHAVIOR OF BUCKLING RESTRAINED BRACE WITH FULL-LENGTH OUTER RESTRAINT: EXPERIMENT AND RESTORING FORCE MODEL. The Hong Kong Institute of Steel Construction, September 2023. http://dx.doi.org/10.18057/ijasc.2023.19.3.1.

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In order to solve the instabilities, fracture failures, and difficult repairs of welded gusset plates in buckling-restrained braced frames (BRBFs) under severe earthquakes, the idea of a full-length outer restraint BRB (FLBRB) is introduced. This new brace consists of a cross-section core, two end-weakened connectors, and a full-length outer restraint. In this paper, three FLBRBs with different parameters were designed, and their mechanical behaviors were evaluated through quasi-static testing, including failure mode, stress distribution and hysteretic behavior. Besides, the refined FE models were established and compared with the test. And the simplified bilinear load-displacement model and hysteretic rule considering the degradation of unloading stiffness are proposed based on the experimental investigation and FE simulation, the simplified bilinear load-displacement model and hysteretic rule considering the degradation of unloading stiffness are proposed, as well as the formulas for calculating the stiffness of either loading or unloading. The results demonstrate that the FLBRB has good hysteresis performance as it can confine the plastic to the weakened connectors and the BRB. Furthermore, the simplified restoring force model was verified by comparing it with the experiment, indicating that the load–displacement curve of the FLBRB could be accurately predicted by the suggested theoretical formula and model. These research results can be adopted to provide theoretical foundation for the engineering application of the FLBRB.
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