Collapse behavior of thin-walled conical tube clamped at both ends subjected to axial and oblique loads

Azarakhsh, Sajad; Ghamarian, Ali

doi:10.1016/j.tws.2016.11.020

Cited by 45 publications

(12 citation statements)

References 25 publications

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“…After storing the results of buckling analysis, the Imperfection coefficient, which is used in the nonlinear solver Riks, reads the buckling modes and changes them by the specified magnitudes. By a trial-and-error method and comparing the results of the FE models with the experimental tests, 36 the magnitudes are considered 4% of ribs thickness for the first two modes.…”

Section: Simulationmentioning

confidence: 99%

The compressive behavior of a composite cylindrical pyramidal lattice structure manufactured with a new production methodology

Mohammadi

Sadeghi

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this paper, a new manufacturing method of pyramidal lattice cells has been suggested to produce lattice composite cylinders. Moreover, the effect of fiber volume fraction, vacuum molding, and fiber pre-tension has been investigated on the load-carrying capacity of the cylindrical pyramidal lattice structure of a carbon fiber composite. The carbon fiber composite cylindrical pyramidal lattice structure has been manufactured with laying fibers along the grooves of a silicone mold. Then, it has been subjected to the axial compressive test. Furthermore, to make pre-tension in fibers, a metal mold has been designed. Fiber pre-tension ensures the alignment of the fibers is straight between two nodal points. Additionally, the structure has been analyzed by the finite element buckling procedure. Experimental tests on the structures show that using a metal mold compare to the silicone molding method increases load-carrying capacity up to 48% without significantly varying the weight. Therefore, this method can be used for manufacturing pyramidal lattice structures in the hand layup process.

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Section: Simulationmentioning

confidence: 99%

The compressive behavior of a composite cylindrical pyramidal lattice structure manufactured with a new production methodology

Mohammadi

Sadeghi

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…In this article, Abaqus/Explicit software is used to carry out the dynamic model thanks to the wide applications of FEA tools in the analysis of dynamic crushing of thin-walled structure and cellular materials. 16,19,26,33,[39][40][41][42] The finite element model is built with four-node reduced integration shell elements with five integration points across the thickness. The contact between the impacting rigid plate and the thin-walled tube is a node-to-surface contact with friction coefficient of 0.2, and the supporting rigid plate and the thinwalled tube are defined as ''tied.''…”

Section: Crashworthiness Indicatorsmentioning

confidence: 99%

Crushing analysis and multi-objective crashworthiness optimization of multi-cell conical tube subjected to oblique loading

Deng

Liu

2019

Advances in Mechanical Engineering

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In this article, a novel multi-cell conical tube is designed. First, a detail analysis about the crashworthiness of three structures, that is, the multi-cell conical tube, multi-cell square tapered tube, and fourfold-cell conical tube, is made and compared at the condition of keeping the same mass with different oblique load angles. Then, the influences of the internal cell walls, load angle, the cone angle, and wall thickness on the performances of crashworthiness are investigated. The multi-cell conical tube has better energy absorption capacity than multi-cell square tapered tube and fourfold-cell conical tube at small load angles. The normalization of average gradients of the cone angle on specific energy absorption reached 48.25% compared with the wall thickness. The full factorial design and the optimal Latin hypercube design method are adopted to define the sample points and error analysis points. A numerical simulation on the sample points and error analysis points are performed using Abaqus/Explicit. According to different working conditions, different optimization objects are determined, and corresponding surrogate models with different indicators are constructed using Kriging method. The accuracy of surrogate model is evaluated. The non-dominated sorting genetic algorithm-II is utilized to optimize the multi-objective problem. Finally, the influence of structural parameters on crashworthiness is discussed.

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“…The series of computational and experimental investigations on the deformation behaviour and energy-absorbing features of various geometry profiles, such as square, cylindrical, hat-type, corrugated, frusta and tapered tubes under quasi-static and impact loading are well studied in the previous literature. [13][14][15] Amongst them, metallic cylindrical tubes have fascinated much more consideration of the researchers and scientists owing to their low weight combined with the extraordinary strength and ease of fabrication process, which leads to the low cost of the energy dissipating element. 16,17 Regardless of the better impact performance of cylindrical tubes, high initial peak crushing force (IPCF) is the most important concern which has the perspective to cause severe injuries to the passengers and heavy damage to the automobile.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis on the axial crushing and energy absorption characteristics of novel hybrid aluminium/composite-capped cylindrical tubular structures

Kumar

2019

Proceedings of the Institution of Mechanical Engineers, Part L:

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In recent years, aluminium-composite hybrid tubular structures, which combine the stable and progressive plastic deformation of the aluminium metal with light-weight composite materials, are obtaining increased consideration for meeting the advanced needs of crashworthiness characteristics. This research article presents the experimental outcomes of novel aluminium/composite-capped cylindrical tubes subjected to quasi-static and impact axial loads. The influence of various capped geometries in the aluminium segment and three different fabrics of the composite segment in the cylindrical tube are investigated experimentally. The outcomes of the impact crushing test are also correlated with the quasi-static results of the proposed aluminium/composite-capped cylindrical tubes. The overall outcomes revealed that the crashworthiness characteristics of crushing force consistency and specific energy absorption of the aluminium-composite hybrid tubes are superior to those of the bare aluminium tubes. When the glass fabric/epoxy composite is wrapped to aluminium cylindrical tubes, the specific energy absorption increases about 23–30%, and the wrapping of hybrid glass/kenaf fabrics increases the specific energy absorption of almost 40–52%. Such a hybrid tubular structures would be of huge prospective to be used as effective energy-absorbing devices in aerospace and automotive applications. A further benefit of the composite-wrapping approach is that the composite might be retro-fitted to aluminium tubes, and the energy absorption capability is shown to be significantly enhanced by such utilization.

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Collapse behavior of thin-walled conical tube clamped at both ends subjected to axial and oblique loads

Cited by 45 publications

References 25 publications

The compressive behavior of a composite cylindrical pyramidal lattice structure manufactured with a new production methodology

The compressive behavior of a composite cylindrical pyramidal lattice structure manufactured with a new production methodology

Crushing analysis and multi-objective crashworthiness optimization of multi-cell conical tube subjected to oblique loading

Experimental analysis on the axial crushing and energy absorption characteristics of novel hybrid aluminium/composite-capped cylindrical tubular structures

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