Quasi-Static Crushing and Energy Absorption Characteristics of Thin-Walled Cylinders with Geometric Discontinuities of Various Aspect Ratios

Baaskaran, N; Ponappa, K.; Shankar, Shyam

doi:10.1590/1679-78253866

Cited by 18 publications

(13 citation statements)

References 22 publications

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“…The authors selected V = 2, 5, and 10 mm/min to ensure the absence of the dynamic effect while testing. [60] Other reason for selecting hole diameters of 6, 12, and 18 mm is to keep enough margins from the tube sides. The same reason was taken into consideration when selecting the location of the hole (P/L = 0.25, 0.5, and 0.75).…”

Section: Numerical/ Experimentalmentioning

confidence: 99%

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The influence of induced holes on crashworthy ability of glass reinforced epoxy square tubes

2022

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The crashworthy ability of glass/epoxy (GFRP) square tubes with induced holes was studied under quasi‐static axial crashing. Four design parameters were chosen, each at three levels, to calculate crashworthiness indicators. The design variables are hole diameter (d), hole position/specimen length (P/L), number of holes/distribution (n), and speed (V). To get the optimum crashworthiness parameters, the design of experiments approach using Taguchi technique was adapted. Optimal conditions with minimum initial peak force (normalFip), maximum absorbed energy (U) and maximum specific energy absorption (SEA) were determined. Main effect, signal/noise ratio (S/N), and analysis of variance (ANOVA) were determined using MINITAB 18. Experiments based on L9 orthogonal array were performed. Results indicated that the dominant influencing parameter on normalFip is “n” with a contribution of 93.97%. “V” followed by “d” are the highest influencing parameters on “U” with a contribution of 49.07 and 43.02%, respectively. “d” is the highest influencing parameter on SEA, followed by “V” with a contribution of 50.71% and 46.12%, respectively. Confirmation tests were carried out to validate the estimated model with respect to experimental results. normalFip, U, and SEA of intact tube were 45.05 kN, 830.32 × 10−3 kJ, and 8.23 × 10−3 kJ/g, respectively. The optimum normalFipof GFRP tubes with cutouts was found to be 38.59% smaller than that of the intact specimen. The optimum U and SEA of are, respectively, 4.73% and 25.76% greater than those of intact specimen.

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Section: Numerical/ Experimentalmentioning

confidence: 99%

“…[12,47,53,55,58,59] Others adapted V = 5 mm/ min. [50,54,[60][61][62] While, Han et al, [63] Sathishkumar et al [64] , Abd El-baky et al, [29,65,66] Alshahrani et al [67] adapted V = 10 mm/min in their studies and so on. So, the authors tried to find the effect of crosshead speed on the perforated glass/epoxy thin-walled tubes.…”

Section: Introductionmentioning

confidence: 99%

The influence of induced holes on crashworthy ability of glass reinforced epoxy square tubes

2022

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“…The authors selected V = 2, 5, and 10 mm/min to ensure the absence of the dynamic effect while testing. 56 Other reason for selecting hole diameters of 6, 12, and 18 mm is to keep sufficient margins from the tube sides. The same reason was taken into consideration when selecting the position of the hole (P/L = 0.25, 0.5, and 0.75).…”

Section: Numerical/ Experimentalmentioning

confidence: 99%

“…For crosshead speed, Kathiresan et al, 10,63 Liu et al, 65,71 Kathiresan, 60 adapted V = 2 mm/min. Song et al, 72 Baaskaran et al, 56 Elahi et al, 73 Özbek et al 64 adapted V = 5 mm/min. Han et al, 49 Sathishkumar et al, 70 Abd El-baky et al, 26,74,75 Alshahrani et al 76 adapted V = 10 mm/min.…”

Section: Introductionmentioning

confidence: 99%

Quasi-static axial crushing performance of thin-walled tubes with circular hole discontinuities

Alshahrani

Sebaey

Allah

et al. 2022

Journal of Composite Materials

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This paper investigates the crashworthiness performance of square pipes with induced holes. Glass reinforced epoxy (GFRP) specimens were fabricated and tested under quasi-static axial crashing. Four design parameters were chosen, each at three levels, to calculate crashworthiness indicators. The design parameters are the hole diameter (d), the hole position to specimen length ratio (P/L), the number of holes and distribution (n), and crosshead speed (V). Taguchi technique has been adapted to get the optimum crashworthiness parameters. Experiments based on Taguchi’s orthogonal array with 9 experimental runs (L9) were performed. Optimal conditions with the maximum absorbed energy (U) and minimum initial peak force ([Formula: see text]) were determined. The main effects, signal to noise ratio (S/N), and analysis of variance (ANOVA) have been investigated. Results indicated that “V” followed by “d” are the highest influencing parameters on the values of “U” with a contribution of 49% and 43%, respectively. The dominant influencing parameter on the values of [Formula: see text] is “n” with a contribution of 94%. Finally, confirmation tests were carried out to validate the estimated model with respect to experimental results. The optimum U and [Formula: see text] of GFRP square pipes with circular cutouts were compared with those of non-porous specimens.

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“…During the impact or crash events, the thin-walled energy-absorbing structures can often be used to absorb the more impact kinetic energy and to guarantee the occupants' safety through the crashworthy design, which can play the major roles in automobile or aerospace application. [1][2][3][4][5][6][7][8] Various thin-walled energyabsorbing structures have been designed and researched, such as circular tubes, [9][10][11][12][13][14] square tubes, [15][16][17][18] flat plates, 19,20 conical shells, 21,22 C channels, [23][24][25][26][27] I-shaped cross-section structures 28 and sinusoidal specimens, [29][30][31][32] etc. Compared with the metal thin-walled structures, the composite thin-walled energy-absorbing structures have been widely used because of the advantages of higher specific strength, higher specific stiffness, and higher specific energy absorption (SEA), which can absorb a large amount of impact kinetic energy in the controlled progressive failure modes during the impact or crash event.…”

Section: Introductionmentioning

confidence: 99%

Experimental researches on failure and energy absorption of composite laminated thin-walled structures

Mou

Xie

Zou

et al. 2020

Journal of Composite Materials

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To research the failure of carbon fiber-reinforced composite laminated specimens, the tensile tests and compressive tests were conducted for [90]16 and [0]16 specimens, and the shear tests were conducted for [±45]4s specimens, and the microscopic failure mechanisms were observed by scanning electron microscopy. To research the failure and energy absorption of different thin-walled structures with different layups, the quasi-static axial crushing tests were conducted for [±45/0/0/90/0]s and [0/90]3s circular tubes, [0/90]3s and [±45]3s square tubes, [0/90]4s and [±45]4s sinusoidal specimens, and the internal failure were further investigated by 3D X-ray scan. Based on the load-displacement curves, the energy absorptions were evaluated and compared according to specific energy absorption and peak crushing force, and the relationships between failure modes and specific energy absorption, peak crushing force were further researched. The results show that the macroscopic failure modes are the collective results of varieties of microscopic failure mechanisms, such as fiber fracture, matrix deformation and cracking, interlamination and intralamination cracks, cracks propagation, etc. The [±45/0/0/90/0]s circular tube shows the transverse shearing failure mode with high specific energy absorption. The [±45]3s square tube and [±45]3s sinusoidal specimen show the local buckling failure mode with low specific energy absorption. The [0/90]4s sinusoidal specimen, [0/90]3s circular tube, and [0/90]3s square tube show the lamina bending failure mode with medium specific energy absorption. The failure mode of thin-walled structure can be changed by reasonable layups design, and the energy absorption can further be improved.

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Quasi-Static Crushing and Energy Absorption Characteristics of Thin-Walled Cylinders with Geometric Discontinuities of Various Aspect Ratios

Cited by 18 publications

References 22 publications

The influence of induced holes on crashworthy ability of glass reinforced epoxy square tubes

The influence of induced holes on crashworthy ability of glass reinforced epoxy square tubes

Quasi-static axial crushing performance of thin-walled tubes with circular hole discontinuities

Experimental researches on failure and energy absorption of composite laminated thin-walled structures

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