Axial capacity and crushing of thin-walled metal, fibre–epoxy and composite metal–fibre tubes
Axial capacity and crushing of thin-walled metal, fibre–epoxy and composite metal–fibre tubes
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DOI：
10.1016/j.tws.2010.01.006
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发表时间：
2010-06
影响因子：
6.4
通讯作者：
M. Bambach
中科院分区：
文献类型：
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作者：
M. Bambach
最近的调查显示，与金属SHS相比，具有外部粘结碳纤维的方形中空截面（SHS）金属管的轴向承载力和平均破碎载荷显著增加。复合金属纤维管采用碳纤维增强聚合物（CFRP）矩阵布局的两个和四个碳纤维层。本文分别制作了两层和四层碳纤维自蔓延高温钢结构，并对其轴压承载力和抗压性能进行了试验研究。测试了四种不同的管尺寸，导致管的宽度与厚度比在32和144之间。一个摄影测量系统，以准确地确定屈曲和屈曲后的行为。结果表明，复合金属-CFRP SHS的能力和平均压碎载荷超过了单个金属SHS和CFRP SHS的总和，最多可达1.8倍。这种复合作用的结果从金属和碳纤维之间的债券，和力学方面的屈曲，能力和破碎进行了讨论。金属，复合金属-CFRP和CFRP管壁的强度确定使用的有效宽度的方法，并显示比较好的实验结果。
Recent investigations of square hollow section (SHS) metal tubes with externally bonded carbon fibres have shown significant increases in the axial capacity and mean crushing load, compared with the metal SHS. The composite metal–fibre tubes employed carbon fibre reinforced polymer (CFRP) matrix layouts of two and four layers of carbon fibres. In this paper the same sized two and four layer CFRP SHS were manufactured independent of the metal SHS, and the axial capacity and crushing behaviour were determined experimentally. Four different tube sizes were tested, resulting in tube width to thickness ratios between 32 and 144. A photogrammetry system was employed to accurately determine the buckling and post-buckling behaviour. It is shown that the capacity and mean crush load of the composite metal–CFRP SHS exceed the sum of those for the individual metal SHS and CFRP SHS, by up to 1.8 times. This composite action results from the bond between the metal and the carbon fibres, and the mechanics with respect to buckling, capacity and crushing is discussed. The strength of metal, composite metal–CFRP and CFRP tube walls are determined using the effective width approach, and are shown to compare well with the experimental results.