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    • 高温环境下多壁管增强泡沫铝压溃行为的理论分析与数值模拟研究

    ZHANG Wang, WU Ke, WEI Xin,ZHANG Zhijia,ZHANG Qiancheng,JIN Feng

    Chinese Journal of Applied Mechanics（2024）

    Cited 0|Views5
    Abstract
    通过理论和数值模拟方法研究了新型高效吸能结构——多壁管增强泡沫铝在高温环境下的压溃特性及能量吸收性能。采用能量法预测了多壁管增强泡沫铝的轴向压缩平均力，在此基础上研究了温度以及泡沫铝与多壁管材料流动应力之比对结构吸能效率的影响。结果表明：理论预测值与有限元结果吻合较好，最大误差值为-6.7%;环境温度从室温上升至350℃,温度升高导致材料力学性能下降，多壁管增强泡沫铝平均力下降了1/3;另外，流动应力之比会影响多壁管半折叠波长或塑性铰数目，因此通过控制合适的流动应力之比可以提高结构吸能效率。
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    Key words
    multi-walled tube,aluminum foam,high temperature performance,crushing performance,energy absorption efficiency
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