Quasi-static axial compression experiments were conducted on the composite thin-walled C-channels with different flange widths. The axial compression failure modes and failure mechanisms were analyzed through CT scanning,and the effects of different flange widths on the axial compression energy-absorption characteristics of C-channels were evaluated by using the energy-absorption indexes. The single-layer shell model and multi-layer shell model of composite C-channel were established,and the finite element models were verified by comparing the failure modes,load-displacement curves and energy-absorption indexes. The results show that the flange width has a significant effect on the axial compression failure modes and energy-absorption characteristics of C-channels. The C-channels with flange widths of 25 mm and 30 mm are failed in the stable and asymptotic manner under the axial compression loads and have good energy-absorption characteristics. The deviation of mean crushing force,energy absorption and specific energy absorption obtained by the multi-layer shell model is within 5%,while that obtained by the single-layer shell model is within 8%,which indicating that the multi-layer shell model of C-channel has the higher simulation accuracy.
Energy-absorption characteristics of composite C-channels with different flange widths under axial compression
2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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