Low velocity impact of empty and foam filled circumferentially grooved thick-walled circular tubes

Darvizeh, A.; Meshkinzar, Ata; Alitavoli, M.; Rajabiehfard, R.

doi:10.1016/j.tws.2016.09.002

Cited by 36 publications

(12 citation statements)

References 30 publications

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“…They observed double buckling-splitting crushing mode. Empty and foam-filled circumferentially grooved thick-walled circular tubes under axial low velocity impact were investigated theoretically and experimentally by A. Darvizeh et al [8]. In [9] the effect of discontinuity size on the energy absorption performance of square profiles was reported.…”

Section: State Of the Art: An Overviewmentioning

confidence: 99%

Energy absorption capability numerical analysis of thin-walled prismatic tubes with corner dents under axial impact

Ferdynus¹,

Kotełko²,

Král³

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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EnErgy absorption capability numErical analysis of thin-wallEd prismatic tubEs with cornEr dEnts undEr axial impact numEryczna analiza EnErgochłonności ciEnkościEnnych słupów pryzmatycznych z przEtłoczEniamiThe paper presents results of a parametric study into energy absorption capability of thin-walled square section columns with redrawn dents, subjected to axial impact compressive load. Thin-walled aluminum tubes with four dents in the corners were under investigation. The varying parameters were the dent's depth and distance of the dent to the base. The study was performed using Finite Element numerical code. Three crashworthiness indicators were examined: peak crushing force, crash load efficiency and stroke efficiency. The numerical results are shown in load-shortening diagrams, as well as diagrams and maps of crashworthiness indicators. It was found, that the main factor influencing a crushing mode and, subsequently, energy absorption capability, is a dent depth. The dent distance from the base is of less importance. Also a position of a dent, either at the bottom, or at the top base (the load application point) does not influence the crushing behavior significantly. For the deepest dents the relative increase of crash load efficiency (CLE) amounts 25% in comparison with the column without dents.

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Section: State Of the Art: An Overviewmentioning

confidence: 99%

Energy absorption capability numerical analysis of thin-walled prismatic tubes with corner dents under axial impact

Ferdynus¹,

Kotełko²,

Král³

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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“…where is a crushing distance (see Fig.1). The factor , which directly indicates absorbing effectiveness is the energy absorbed (EA) given by relation (1), or specific energy (energy per unit mass) , given by (2), where m is a mass of the absorber.…”

Section: Energy Absorbing Effectiveness Indicators -Overviewmentioning

confidence: 99%

Section: Fig 1 Exemplary Load-shortening Diagram Of Thin-walled Colmentioning

confidence: 99%

Energy Absorbing Effectiveness – Different Approaches

Kotełko

Ferdynus

Jankowski

2018

Acta Mechanica Et Automatica

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In the paper the study of different crashworthiness indicators used to evaluate energy absorbing effectiveness of thin-walled energy absorbers is presented. Several different indicators are used to assess an effectiveness of two types of absorbing structures, namely thin-walled prismatic column with flaws and thin-walled prismatic frustum (hollow or foam filled) in both cases subjected to axial compressive impact load. The indicators are calculated for different materials and different geometrical parameters. The problem of selection of the most appropriate and general indicators is discussed.

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“…While stepped plates were investigated and their superiority over flat plates was completely proven [2,3,5,6,[16][17][18], stepped-thickness cylindrical shells have not been thoroughly investigated. The mode of deformation for axially stepped cylindrical shells was investigated for static and dynamic loads and it was found that the thin, stepped sections effectively localized deformation [19][20][21]. Also, the authors investigated acoustic and radiation characteristics of cylindrical shells with axial steps [22,23].…”

Section: Introductionmentioning

confidence: 99%

Vibration of circumferentially stepped-thickness piezoelectric cylindrical shells

Meshkinzar¹,

Al‐Jumaily²

2019

Vib. proced.

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In this work, thickness variations are introduced around the circumference of a piezoelectric cylindrical shell. The aim is to investigate the vibration characteristics of the shells and the effect of these step-thickness variations on the mode shape of vibration. These thickness variations require stress distribution analysis as well to avoid failure of the cylindrical shell. To this aim, two configurations of stepped-thickness shells with two and three circumferential thickness variations are investigated using FEA software, ANSYS. The results show that these steps assist in localizing vibration in the thin sections and excite mode shapes having the same circumferential wave number as the number of thickness variations. This can be a suitable approach to control and forcibly excite certain vibration mode shapes, which might be required for some applications.

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Low velocity impact of empty and foam filled circumferentially grooved thick-walled circular tubes

Cited by 36 publications

References 30 publications

Energy absorption capability numerical analysis of thin-walled prismatic tubes with corner dents under axial impact

Energy absorption capability numerical analysis of thin-walled prismatic tubes with corner dents under axial impact

Energy Absorbing Effectiveness – Different Approaches

Vibration of circumferentially stepped-thickness piezoelectric cylindrical shells

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