Nonlinear vibrations of circular cylindrical shells with thermal effects: an experimental study

Zippo, Antonio; Barbieri, Marco; Iarriccio, Giovanni; Pellicano, Francesco

doi:10.1007/s11071-018-04753-1

Cited by 26 publications

(11 citation statements)

References 29 publications

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“…The present paper continues and completes the investigation presented in Zippo et al, 37 where homogeneous temperature fields were considered. Here, the investigation is devoted to the effect of gradients of temperature.…”

Section: Literature Reviewsupporting

confidence: 81%

“…The seismic base motion is controlled with an open-loop control strategy. Instead, a real-time closed-loop strategy is used to control the voltage signal sent to the shaker power amplifier: the control voltage is externally generated in MATLAB environment and then is sent to the amplifier through a Testlab module (see references Pellicano; 22 Pellicano et al; 35 Zippo et al 36,37 ). The output provided by the shaker controller is a steppedsine voltage v i (t) function.…”

Section: Test Setupmentioning

confidence: 99%

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Resonances and nonlinear vibrations of circular cylindrical shells, effects of thermal gradients

Iarriccio

Zippo

Pellicano

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this paper, the results of an experimental campaign focused on the vibrations of shells are presented. More specifically, the goal is to investigate the effect of thermal gradients across the shell thickness on the nonlinear dynamics. The shell is made of polymeric material and an aluminum mass is clamped on one end of the shell; the other shell end is clamped to an electrodynamic shaker, which provides a base harmonic excitation. Tests are performed in a controlled environment where a thermal gradient on the shell thickness is generated by means of a climatic chamber and an internal cartridge heater. Different temperature gradients and base excitation levels have been considered. The nonlinear dynamic scenario is analyzed through amplitude–frequency diagrams, bifurcation diagrams, waterfall diagrams, time histories, Fourier spectra, phase portraits, and Poincaré maps. Results show a strong effect of the temperature on the dynamic response of the shell: subharmonic, quasi-periodic, and chaotic vibrations take place as well as large amplitude vibrations, high sound levels are detected.

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Section: Literature Reviewsupporting

confidence: 81%

Section: Test Setupmentioning

confidence: 99%

Resonances and nonlinear vibrations of circular cylindrical shells, effects of thermal gradients

Iarriccio

Zippo

Pellicano

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…and numerous literatures have been published in order to prove so. [24][25][26][27][28][29][30][31] The corrugations introduced in the tubes have just caused more interest among researchers in this area as they are proven to ease the plastic deformation and make them happen at predetermined intervals along the tube. [32][33][34][35] The main purpose of using them is to optimize the uniformity of the force-displacement curves of the tubes which are crushed axially, in addition to predicting and controlling the collapse mode in each corrugation and to improve the EA capacity of the whole structure.…”

Section: Introductionmentioning

confidence: 99%

Bi-tubular corrugated composite conical–cylindrical tube for energy absorption in axial and oblique loading: Analysis and optimization

Sadighi

Mahbod

Asgari

2020

Journal of Composite Materials

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In this paper, a new bi-tubular corrugated composite tube, consisting of inner and outer cylindrical and conical tubes is proposed. Different models with various geometrical parameters including the radius of curvatures and their numbers are considered and studied numerically in axial and oblique crushing in order to achieve favorable crashworthiness parameters. Moreover, quasi-static compression tests have been conducted to obtain results in order to validate the finite element model. There has been a sensible agreement between the numerical results and experimental data. Finite element models are also validated using the analytical solutions for both straight and corrugated composite tubes. Regardless of the number and radius of curvatures, as the crashworthiness of bi-tubular corrugated structures both in axial and oblique crushing is investigated and compared with their single-wall and bi-tubular straight peers, a considerable improvement is achieved in all crashworthiness parameters, including desirable increase in specific energy absorption, favorable reduction in peak force, and consequently a beneficial rise in crushing force efficiency. In addition, an optimization study using a suitable multi-objective function is done to choose the best model among the existing models, in addition to finding an optimum model via genetic algorithm. In the next step, a parametric study is conducted on the best model to inspect how well it undergoes oblique crushing at different angles. Finally, this best model and two other candidates have been chosen to investigate the effect of using foams and then the energy absorption capability of the empty and foam-filled tubes has been compared.

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“…In [2], the effect of the temperature has been studied on a thin circular cylindrical shell made of polyethylene terephthalate (PET) showing that temperature variations highlight the complex dynamics of the shell, as in [3], where the thermal gradient was applied. In [4], the role of the boundary conditions is highlighted by the authors that provided in a nonideal realization of the fixed-fixed joint, a possible reason for the difference between the experimental data and the modelling.…”

Section: Introductionmentioning

confidence: 99%

Vibrations of Plates with Complex Shape: Experimental Modal Analysis, Finite Element Method, and R-Functions Method

Zippo

Iarriccio

Pellicano

et al. 2020

Shock and Vibration

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In this paper, the dynamic behavior of 3D-printed plates with different shapes and boundary conditions is investigated. The natural frequencies and mode shapes were determined using three different methods: the experimental analysis, the finite element method, using Nastran, and the R-functions method. The experimental and theoretical results are compared. The specimens tested included four cases. The test procedure is deeply described, and the material properties of the plates are given. The fixed-fixed configuration shows a better agreement both in the rectangular plate and in the plate with rectangular cuts, and the R-functions method gives better convergence with respect to the experimental and finite element analysis. The simply supported arrangement indicates some uncertainty in the boundary realization of the specimen.

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Nonlinear vibrations of circular cylindrical shells with thermal effects: an experimental study

Cited by 26 publications

References 29 publications

Resonances and nonlinear vibrations of circular cylindrical shells, effects of thermal gradients

Resonances and nonlinear vibrations of circular cylindrical shells, effects of thermal gradients

Bi-tubular corrugated composite conical–cylindrical tube for energy absorption in axial and oblique loading: Analysis and optimization

Vibrations of Plates with Complex Shape: Experimental Modal Analysis, Finite Element Method, and R-Functions Method

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