本研究探讨了温度对碳纤维增强环氧复合材料(CFRP)管吸能结构耐撞性能的影响,通过准静态轴向压缩和侧向压缩试验,分析了CFRP管在不同温度条件下(−30˚C, 20˚C, 70˚C, 140˚C, 180˚C)的力学性能与失效模式,揭示了其耐撞性随温度变化的规律。研究结果表明,在轴向压缩载荷作用下,当温度低于玻璃转变温度(Tg)时,CFRP管以纤维断裂为主要能量吸收机制,表现出较高的比吸能(SEA);而当温度高于Tg时,破坏模式由花瓣状破坏转变为渐进折叠,SEA显著下降,表明材料在高温环境下的吸能性能减弱。在侧向压缩载荷下,CFRP管的能量吸收特性表现出不稳定性,但在接近Tg的温度范围内试样具有较优的承载能力。随着温度进一步升高,SEA呈现大幅下降的趋势。本研究探讨了温度对CFRP管力学性能和失效机制的影响,为CFRP管的耐撞性设计与高低温环境中的应用提供了实验依据。This study investigates the effect of temperature on the crashworthiness of carbon fiber reinforced epoxy composite (CFRP) tube energy-absorbing structures. Using quasi-static axial compression and lateral compression tests, the mechanical properties and failure modes of CFRP tubes were systematically examined at various temperatures (−30˚C, 20˚C, 70˚C, 140˚C, 180˚C), providing a comprehensive analysis of their crashworthiness. The results indicate that when the temperature is below the glass transition temperature (Tg), CFRP tubes primarily absorb energy through fiber breakage under axial compression. Conversely, when the temperature exceeds Tg, the predominant deformation mode transitions from petal-shaped failure to progressive folding, accompanied by a significant reduction in specific energy absorption (SEA). Under lateral compression, the energy absorption behavior is unstable;however, specimens exhibit enhanced load-bearing capacity near Tg. With increasing temperature, the SEA declines sharply, reflecting diminished energy absorp
