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

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作   者：

Duarte, Isabel;  Krstulovic-Opara, Lovre;  Vesenjak, Matej; 

作者机构：

Univ Split;  R Boskovica 32;  P-3810193 Aveiro;  Slovenia;  Univ Aveiro;  Fac Elect Engn Mech Engn & Naval Architecture;  Univ Maribor;  TEMA;  Smetanova Ul 17;  Croatia;  Campus Univ Santiago;  Fac Mech Engn;  Dept Mech Engn;  SI-2000 Maribor;  HR-21000 Split;  Portugal; 

关键词：

Closed-cell aluminium foam;  Compressive behaviour;  Foam-filled structures;  Energy absorption;  Thin-walled tubes;  Deformation modes; 

期刊名称：

Composite structures

i s s n：

0263-8223

年卷期：

2018 年 192 卷 May 期

页   码：

184-192

页   码：

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.