Abstract An energy dissipating mechanism for crushing square aluminium/CFRP tubes
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An energy dissipating mechanism for crushing square aluminium/CFRP tubes

机译：破碎方形铝/ CFRP管的耗能机制

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AbstractA platen with cutting blades was introduced as a new energy dissipating mechanism to simultaneously cut and crush square bare CFRP tubes and CFRP tubes wrapped externally with aluminium sheets. The specially designed and manufactured platens with four round tip blades, four sharp tip blades and eight round tip blades were used to reduce the initial peak crushing force and increase the energy absorption of CFRP tubes. Notches were introduced at one end of tubes to control the location of the initial failure. Experimental results showed that the deformation mode of CFRP tubes and aluminium sheet-wrapped CFRP tubes that were crushed by platens with blades was a combination of splaying progressive and transverse shearing failure mode. More damage was observed to CFRP plies when tubes were crushed by using round tip blades. Tubes cut and crushed by a platen with eight round tip blades had a lower initial peak crushing force, higher mean crushing force, larger energy absorption and higher specific energy absorption in comparison with counterpart tubes crushed by flat platens. A comparison between the new trigger mechanism proposed in this study (cutting blades) and other different trigger mechanisms used in published literature was made.
机译： 摘要 引入了带有切割刀片的压板作为一种新的耗能机制，可同时切割和粉碎方形裸露的CFRP管和外部包裹的CFRP管铝板。经过特殊设计和制造的压板具有四个圆形尖端刀片，四个锋利的尖端刀片和八个圆形尖端刀片，以降低初始峰值破碎力并增加CFRP管的能量吸收。在管的一端引入了槽口，以控制初始故障的位置。实验结果表明，碳纤维增强塑料管和铝板包裹碳纤维增强塑料管的变形模式是由张开的压板和叶片横向剪切破坏模式组合而成。当使用圆头刀片压碎管子时，观察到对CFRP帘布层的损害更大。与用平板压板压碎的管子相比，由带有八个圆头刀片的压板切割和压碎的管子具有较低的初始峰值压碎力，更高的平均压碎力，更大的能量吸收和更高的比能吸收率。比较了本研究中提出的新触发机制（刀片）和已发表文献中使用的其他不同触发机制。

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