PDF(Pubmed)
Abstract：
The energy-absorbing capacity and friction phenomena of different closed-cell aluminium foam-filled Al tube types are investigated through experimental compression tests. Concerning the kind of investigation, free, radial-constrained and friction tests occurred. The radial-constrained compression test results confirm that the process requires significantly more compression energy than without the constrain. Pushing away different pre-compressed foams inside the aluminium tube, the static and kinematic frictional resistances can be determined and the energy required to move them can be calculated. Knowing the value of the energy required for the frictional resistance, we can obtain how much of the energy surplus in radially inhibited compression is caused by the friction phenomena. The main goal present study is to reveal the magnitude of friction between the foam and the wall of the tube during the radially constrained test. The investigation used 0.4 and 0.7 g/cm3 density closed-cell aluminium foam whilst a compressive test was applied where the force-displacement data were recorded to calculate the absorbed energy due to friction. Considering the results of the test, it can be stated that 18% of the invested energy was used to overcome friction in the case of lighter foam and almost 23% with 0.7 g/cm3 foam during the radial-constrained test.
摘要：
通过实验压缩试验，研究了不同闭孔泡沫铝填充铝管类型的能量吸收能力和摩擦现象。关于调查的种类，免费,径向约束和摩擦测试发生。径向约束压缩测试结果证实,与没有约束的情况相比,该过程需要显著更多的压缩能量。在铝管内推开不同的预压缩泡沫，可以确定静态和运动摩擦阻力，并可以计算移动它们所需的能量。知道摩擦阻力所需的能量值，我们可以得到多少的能量过剩在径向抑制压缩引起的摩擦现象。本研究的主要目标是揭示径向约束测试过程中泡沫与管壁之间的摩擦程度。研究使用0.4和0.7g/cm3密度的闭孔泡沫铝，同时进行压缩测试，记录力-位移数据以计算由于摩擦而吸收的能量。考虑到测试结果，可以说，在较轻泡沫的情况下，18％的投入能量用于克服摩擦，在径向约束测试期间，0.7g/cm3泡沫几乎为23％。
