浸润法制造的开孔铝泡沫的低速冲击行为实验研究

IF 2.1 Q2 ENGINEERING, CIVIL
M. Hajizadeh, Mojtaba Yazdani, Hosein Khodarahmi
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引用次数: 0

摘要

本研究考察了开孔铝泡沫在不同载荷条件下的行为和能量吸收。泡沫是通过渗透法制成的,这种低成本方法能产生均匀的孔隙分布。使用两台不同冲击速度和重量的机器对泡沫进行压缩。对泡沫的应力-应变和能量吸收曲线进行了测量和分析。结果表明,应变速率和冲击重量会影响泡沫的压缩性能和能量吸收。在质量不变的情况下,264 s-1 以下的应变速率对塑性区域的恒定应力即高原应力没有影响。然而,在 264 s-1 时,增加冲击重量会增加泡沫的高原应力和能量吸收,这表明应变速率敏感性取决于冲击惯性。该研究揭示了通过浸渗制造的开孔铝泡沫的动态特性,并为其在冲击防护中的应用提供了启示。研究还表明,浸渗是制造开孔铝泡沫的一种可靠而稳定的方法。研究强调了高原应力和硬化效应在动态载荷下影响泡沫能量吸收的重要作用。研究建议,今后的研究应考虑将冲击惯性作为影响泡沫应变速率敏感性的参数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental study of the low-velocity impact behavior of open-cell aluminum foam made by the infiltration method
This study examined the behavior and energy absorption of open-cell aluminum foam under different loading conditions. The foam was made by infiltration, a low-cost method that produced a uniform pore distribution. The foam was compressed using two machines with varying impact velocities and weights. The stress–strain and energy absorption curves of the foam were measured and analyzed. The results showed that the strain rate and the impact weight affected the compressive properties and energy absorption of the foam. The strain rate up to 264 s−1 with constant mass did not affect the plateau stress, which was the constant stress in the plastic region. However, at 264 s−1, increasing the impact weight increased the plateau stress and the energy absorption of the foam, which showed that the strain rate sensitivity depended on the impact inertia. The study revealed the dynamic characteristics of open-cell aluminum foam made by infiltration and provided insights for its use in impact protection. The study also showed that infiltration was a reliable and consistent method for making open-cell aluminum foam. The study highlighted the important roles of plateau stress and hardening effect in influencing the energy absorption of the foam under dynamic loading. The study suggested that future studies should consider the impact inertia as a parameter that affects the strain rate sensitivity of the foam.
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来源期刊
CiteScore
4.30
自引率
25.00%
发文量
48
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