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首页> 外文期刊>International journal of steel structures >Dynamic Crushing Behaviors of Aluminum Foam Filled Energy Absorption Connectors
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Dynamic Crushing Behaviors of Aluminum Foam Filled Energy Absorption Connectors

机译：铝泡沫填充吸能连接器的动态破碎行为

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摘要

This paper presented the numerical studies on the dynamic crushing behaviors of the aluminum foam filled energy absorption connectors. The finite element (FE) model was firstly constructed and the accuracy of the FE model was verified by comparing the force-displacement curves from FE analyses with those from tests and analytical predictions. The numerical results revealed that the deformation mode of the connector under dynamic crushing evidently differed from that under quasi-static loading mainly due to the inertia effect. Besides, the energy absorption capacity was also improved when the dynamic crushing load was applied. Then, the parametric studies on the effects of crushing velocity-time history, angle between flat plate and pleated plate as well as pleated plate thickness on the energy absorption enhancements of the connectors were conducted. Based on the numerical results, two empirical equations were derived in terms of various parameters to predict the energy absorption enhancements of aluminum foam and pleated plate, which could be employed to obtain the force-displacement functions of the connectors under dynamic crushing.
机译：本文介绍了填充泡沫铝的吸能连接器的动态破碎行为的数值研究。首先建立了有限元（FE）模型，通过比较有限元分析的力-位移曲线与试验和分析预测的力-位移曲线，验证了有限元模型的准确性。数值结果表明，连接器在动态挤压下的变形模式与准静态载荷下的变形模式明显不同，这主要是由于惯性效应所致。此外，当施加动态破碎载荷时，能量吸收能力也得到提高。然后，对破碎速度-时间历史，平板与打褶板之间的夹角以及打褶板厚度对连接器能量吸收增强的影响进行了参数研究。基于数值结果，根据各种参数推导了两个经验方程，以预测泡沫铝和褶皱板的能量吸收增强，可用于获得连接器在动态破碎下的力-位移函数。

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