Materials Reports  2022, Vol. 36 Issue (Z1): 22020120-6 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Quasi-static Compression Testing and Energy Absorption Mechanism Analysis of Hexagonal Al-composite Thin-walled Hybrid Tubes |
| CHEN Dongfang1, WU Haipeng2, LIANG Fan2, ZHOU Qi2, SONG Xiangang1, TIAN Aiqin1
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1 CRRC Qingdao Sifang Co., Ltd.,Qingdao 266111, Shandong, China
2 Harbin FRP Institute Co., Ltd., Harbin 150029, China |
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Abstract Hybrid energy-absorbing tube are manufactured with composite hexagonal thin-walled tube and Al tube by placement and winding combined process, which has the stable failure and the energy-absorbing mode in axial quasi-static compression testing. The high strength of the ou-ter composite increases the plastic deformation of the inner metal tube, and the support of the inner metal tube limits the local buckling of the composite tube. At the same time, the fiber angle and the trigger mechanism at the end have an obvious influence on the energy absorption effect. The experiments show that the in-plane and interlaminar shear energy absorption are dominant when the fiber angle of the hybrid tube is [±45°], the specific energy absorption were respectively increased by 33.9%, 42.9% and 36.4%, compared with those of [0° /90°], [±45°2/0°/0°/90°/0°], [64°2/0°2/64°2/0°2/64°2] samples. When the trigger mechanism at the end of the hybrid tube was the guide angle, the initial peak load can be reduced more effectively than that of the form of slotting and making the hole at the end.
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Published: 05 June 2022
Online: 2022-06-08
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