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Axial crush behaviour of the aluminium alloy in-situ foam filled tubes with very low wall thickness

机译：极低壁厚的铝合金原位泡沫填充管的轴向挤压行为

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摘要

This paper presents the results of an experimental work carried out to fabricate and characterise the in-situ foam filled tubes (FFTs) made of aluminium alloys prepared by powder metallurgy method, using aluminium alloy tubes with extremely thin walls (similar to 0.6 mm). The fabrication procedure demonstrates that thin-walled tubes with extremely thin walls can support temperatures near to its melting temperature (similar to 700 degrees C) required to form a closed-cell aluminium alloy foam, consequently in-situ filling the tube. The mechanical performance of fabricated structures was evaluated using uniaxial compressive tests and infrared thermography. Results demonstrate that the benefits of the manufacturing process and its product, the FFTs (composite structures). Additionally, they reveal that this is a cost-effective solution to prepare efficient energy absorbing lightweight structures, allowing to adjust the weight and levels of the energy absorption, simultaneously. The results demonstrate that the promising in-situ FFTs with thinner outer tubes axially deform in an efficient mixed mode, showing superior energy absorption capability compared to the empty thin-walled tubes.
机译：本文介绍了实验工作的结果，该实验工作是使用壁厚非常薄（约0.6毫米）的铝合金管来制造和表征由粉末冶金法制备的铝合金制成的原位泡沫填充管（FFT）。该制造过程表明，具有极薄壁的薄壁管可以支撑接近其熔融温度（约700摄氏度）的温度，以形成闭孔铝合金泡沫，从而就地填充该管。使用单轴压缩测试和红外热像仪评估制造结构的机械性能。结果表明，制造过程及其产品FFT（复合结构）的好处。此外，他们还发现这是一种经济高效的解决方案，可用于制备高效的能量吸收轻质结构，从而可以同时调整能量吸收的重量和水平。结果表明，具有前景的原位FFT与更薄的外管在有效混合模式下轴向变形，与空的薄壁管相比，具有出色的能量吸收能力。

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