Experimental and numerical study on buckling of axially compressed composite cylinders

Eglītis, Edgars; Kalniņš, Kaspars; Ozoliņš, Olģerts

doi:10.2478/v10137-009-0004-2

Cited by 7 publications

(4 citation statements)

References 10 publications

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“…It is well known that a load drop in the stable load-deformation path relates to the dissipation of strain energy as the shell transitions into a stable post-buckled shape. Several studies on axially compressed cylindrical shells have focused on the response near the first bifurcation point for purposes of residual capacity estimation [7][8][9], see path (a) in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Structural Optimization and Form-Finding of Cylindrical Shells for Targeted Elastic Postbuckling Response

Burgueño

Lajnef

2014

Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems;

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This paper presents a finite element based numerical study on controlling the postbuckling behavior of thin-walled cylindrical shells under axial compression. With the increasing interest of various disciplines for harnessing elastic instabilities in materials and mechanical systems, the postbuckling behavior of thin-walled cylindrical shells may have a new role to design materials and structures at multiple scales with switchable functionalities, morphogenesis, etc. In the design optimization approach presented herein, the mode shapes and their amplitudes are linearly combined to generate initial geometrical designs with predefined imperfections. A nonlinear postbuckling finite element analysis evaluates the design objective function, i.e., the desired postbuckling force-displacement path. Single and multi-objective optimization problems are formulated with design variables consisting of shape parameters that scale base eigenvalue shapes. A gradient-based algorithm and numerical sensitivity evaluations are used. Results suggest that an optimized shape for a cylindrical shell can achieve a targeted response in the elastic postbuckling regime with multiple mode transitions and energy dissipation characteristics. The optimization process and the obtained geometry can be potentially used for energy harvesting and other sensing and actuation applications.

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Section: Introductionmentioning

confidence: 99%

Structural Optimization and Form-Finding of Cylindrical Shells for Targeted Elastic Postbuckling Response

Burgueño

Lajnef

2014

Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems;

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“…The load eccentricity additionally has been shown to relatively influence the shell buckling load and considered as another class of imperfection. Literally, numerous works have been carried out to address the issue, with few examples discussed here for cylinders (Eglitis, 2011;Eglitis et al, 2009;Simitses et al, 1985;Stuhlman et al, 1966), for cone (Błachut and Stanier, 2012) and stiffened cylinder (Block, 1968;Singer and Rosen, 1976). Besides that, the non-uniform axial compression (Libai and Durban, 1977;Papadopoulos and Iglesis, 2007) and uneven support distribution (Guggenberger et al, 2000;Teng and Rotter, 1992) may effectively influence the shells buckling strength and act as imperfection.…”

Section: Imperfect Length Boundary Condition and Load Eccentricitiesmentioning

confidence: 99%

An Overview of Buckling and Imperfection of Cone-Cylinder Transition under Various Loading Condition

Ifayefunmi

Ismail

2020

Lat. Am. j. solids struct.

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“…The numerical and experimental studies presented in this paper are based on a reference/baseline cylindrical shell design with an effective length of 80 mm, an inner radius of 40 mm, and a thickness of 0.5 mm. This geometry was chosen based on an identified range (from the literature [12,[14][15][16][17][18]) of geometrical ratios (L/R and R/t) that can lead to an elastic postbuckling response, on the size constraint of the available 3D printer used for fabrication of test units, and on pilot testing that showed that the desired features of the elastic postbuckling response could be attained. It should be noted that a perfect cylindrical shell using the following parameters (t ¼ 0.5 mm, E ¼ 1285 MPa, and ¼ 0.2) would buckle at 1189 N based on the classic buckling critical load equation:…”

Section: Seeded Geometric Imperfection (Sgi) Designmentioning

confidence: 99%

Harnessing Seeded Geometric Imperfection to Design Cylindrical Shells With Tunable Elastic Postbuckling Behavior

Burgueño²

2016

Journal of Applied Mechanics

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Geometric imperfection, known as a detrimental effect on the buckling load of cylindrical shells, has a new role under the emerging trend of using buckling for smart purposes. Eigenshape-based geometries were designed on the shell surface with the aim of tailoring the postbuckling response. Fourteen seeded geometric imperfection (SGI) cylinders were fabricated using polymer-based 3D printing, and their postbuckling responses were numerically simulated with a general-purpose finite element program. Results on the prototyped SGI cylinders showed a tunable elastic postbuckling response in terms of initial and final stiffness, the maximum load drop from mode switching, and the number of snap-buckling events. A response contour and discrete map is presented to show how the number of waves in the axial and circumferential directions in the seeded eigenshape imperfection can control the elastic postbuckling response. SGI cylinders provide diverse design opportunities for controllable unstable response and are good candidates for use in smart and adaptive materials/structures.

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Experimental and numerical study on buckling of axially compressed composite cylinders

Cited by 7 publications

References 10 publications

Structural Optimization and Form-Finding of Cylindrical Shells for Targeted Elastic Postbuckling Response

Structural Optimization and Form-Finding of Cylindrical Shells for Targeted Elastic Postbuckling Response

An Overview of Buckling and Imperfection of Cone-Cylinder Transition under Various Loading Condition

Harnessing Seeded Geometric Imperfection to Design Cylindrical Shells With Tunable Elastic Postbuckling Behavior

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