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Static and dynamic axial crush performance of in-situ foam-filled tubes

机译：原位填充泡沫管的静态和动态轴向挤压性能

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The aim of this paper is to study the quasi-static and dynamic compressive crush performance of newly developed in-situ foam-filled tubes (FFTs) made of light aluminium alloys prepared by powder compact foaming technique. By this method, the aluminium alloy empty tube is filled with an aluminium alloy foam during its formation. An extruded precursor of aluminium alloy and titanium hydride powder (0.5 wt.%) has been used for this purpose. The axial mechanical crushing behaviour and the failure mechanisms were assessed by uniaxial compression tests coupled with infrared thermography. The axial crush performance of in-situ FFTs was compared with performance of the individual components (integral-skin foam and empty tubes) submitted to the same heat treatment used to prepare the FFTs. Results confirm that the in-situ FFTs have a more stable axial crush performance. The results also demonstrate that heat treated aluminium alloy structures ensure high ductility and very good crashworthiness since they deform without formation of cracks during compression, which is a pre-requisite for good and reliable crashworthiness behaviour. (C) 2015 Elsevier Ltd. All rights reserved:
机译：本文的目的是研究通过粉末紧密发泡技术制备的，由轻铝合金制成的新开发的现场泡沫填充管（FFT）的准静态和动态压缩破碎性能。通过这种方法，在铝合金空管的形成过程中填充了铝合金泡沫。为此目的，使用了铝合金和氢化钛粉末（0.5重量％）的挤出前体。通过单轴压缩试验结合红外热像仪评估了轴向机械挤压行为和破坏机理。将原位FFT的轴向挤压性能与经受与准备FFT相同的热处理的单个组件（一体式泡沫和空管）的性能进行了比较。结果证实，原位FFT具有更稳定的轴向挤压性能。结果还表明，经过热处理的铝合金结构可确保高延展性和非常好的耐撞性，因为它们在压缩过程中变形而不会形成裂纹，这是良好且可靠的耐撞性的先决条件。 （C）2015 Elsevier Ltd.保留所有权利：

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