This paper studies the flattening process of empty and polyurethane foam-filled composite-metal tubes, experimentally. To prepare these specimens, metal tubes were wrapped with a fiber-reinforced composite using hand layup method. For the metal tubes, two kinds of materials, aluminum and brass, were used, and the composite tubes were made of woven E-glass fiber and vinyl ester resin. A composite tube and a metal tube were tested to compare their flattening process with the results of composite-metal tubes. The specimens were laterally compressed between two rigid plates in quasi-static condition. According to the results, specific absorbed energy (SAE: absorbed energy to the specimen mass) by a studied composite tube is about 1.5 times bigger than the SAE by the metal tubes. However, the deformation mode of the metal tube is more regular than the composite tube. So, in composite-metal tubes, the metal part causes regularity in deformation, and the composite part causes higher energy absorption capacity and lower density at the same time. Finally, the effects of some parameters such as the tubes length, foam-filler, foam adhesion, and density on the energy absorption characteristics of composite-metal tubes are studied. The results indicate that wrapping the metal tubes by composite materials causes more regularity in deformation, higher energy absorption capacity, and lower density, simultaneously.

中文翻译：

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复合金属管承受横向载荷的能量吸收实验研究

本文通过实验研究了空管和聚氨酯泡沫填充复合金属管的压扁过程。为了准备这些试样，金属管使用手工铺设方法用纤维增强复合材料包裹。金属管采用铝和黄铜两种材料，复合管由编织无碱玻璃纤维和乙烯基酯树脂制成。测试了复合管和金属管，以将它们的压扁过程与复合金属管的结果进行比较。试样在准静态条件下在两个刚性板之间横向压缩。根据结果​​，所研究的复合管的比吸收能量（SAE：对试样质量的吸收能量）比金属管的 SAE 大约 1.5 倍。然而，金属管的变形方式比复合管更规整。因此，在复合金属管中，金属部分导致变形规律，同时复合部分导致更高的能量吸收能力和更低的密度。最后，研究了管长、泡沫填料、泡沫附着力、密度等参数对复合金属管吸能特性的影响。结果表明，用复合材料包裹金属管会导致变形更规律，同时具有更高的能量吸收能力和更低的密度。研究了管长、泡沫填料、泡沫附着力、密度等参数对复合金属管吸能特性的影响。结果表明，用复合材料包裹金属管会导致变形更规律，同时具有更高的能量吸收能力和更低的密度。研究了管长、泡沫填料、泡沫附着力、密度等参数对复合金属管吸能特性的影响。结果表明，用复合材料包裹金属管会导致变形更规律，同时具有更高的能量吸收能力和更低的密度。