Circumferential strain concentration in axial crushing of cylindrical and square tubes with corrugated surfaces

Numerical crushing analysis of aluminum foam-filled corrugated single- and double-circular tubes subjected to axial impact loading

“…All empty corrugated tubes showed progressive and concertina mode of deformation along their corrugated surfaces, which is in accord with the previous studies [26,28]. The presence of corrugated surfaces on the tubes was shown to decrease the difference between initial peak force and mean force.…”

“…In last decades, to improve the crashworthiness of thin-walled tubes, several modification methods have been developed and proposed. Among those, filling tubes with different cellular materials or structures including metallic foams [4][5][6][7][8][9][10], synthetic foams [11][12][13][14][15], natural cellular materials [16] and honeycombs [17], multi-tube usage [17][18][19][20][21][22] and generating corrugated/grooved surfaces on the tubes [13,[23][24][25][26][27][28][29][30] were found to be very effective to increase energy absorption capacity and structure safety.…”

Axial-impact buckling modes and energy absorption properties of thin-walled corrugated tubes with sinusoidal patterns

“…Numerical simulations conducted by Chen et al [14] showed that the deformation modes corresponding to corrugations can be classified into axisymmetric and asymmetric modes. In addition, Chen et al [15] studied the circumferential strain concentrations in cylindrical and square tubes with corrugated surfaces under axial compression. They proposed that corrugation is the main factor that determines the deformation mode of corrugated tubes.…”

Energy absorption capability of thin-walled aluminium tubes under crash loading

“…However, in the light of efficient fuel economics, aluminium as a lightweight material is gaining popularity [2]. In terms of the works reported on aluminium as an efficient energy absorber, most of them can be categorized as the following investigations; (a) effect of cross-sectional geometry [3][4][5][6][7], (b) effect of trigger mechanisms [8][9][10][11][12], (c) effect of boundary conditions [13][14][15][16], (d) effects due to innovative designs [6,[16][17][18][19][20][21][22][23] , (e) effect of failure mechanism and (f) effect of fillers such as foams [24][25][26][27]. For the crosssectional geometries, a buckling initiator using inertia force for a hat-shaped cross-section improved the energy absorption for aluminium tubes [3].…”

“…Zhang et al [11] have designed a new trigger mechanism attached to the structure and the novel design has proven to improve the energy absorption and lower the initial peak force. Trigger mechanisms in the form of circumferential strain concentration on corrugated tube surfaces have shown good design initiatives towards enhancing energy absorption [12]. In most of the reported works pertaining to the energy absorption of aluminium tubes, there are no discussions or findings relating to the interaction between design factors on the desired responses.…”