Small object low-velocity impact damage on hybrid sandwich structures with CFRP face sheets and aluminum foam cores
Small object low-velocity impact damage on hybrid sandwich structures with CFRP face sheets and aluminum foam cores
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DOI：
10.1080/13588265.2018.1489338
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发表时间：
2018-11-02
影响因子：
1.9
通讯作者：
Weidenmann, Kay A.
中科院分区：
文献类型：
--
作者：
Rupp, Peter;Elsner, Peter;Weidenmann, Kay A.
夹层复合材料的一个重要但尚未充分研究的载荷情况是小物体的撞击。这一贡献调查夹层板暴露在这样的影响事件。该夹层板由碳纤维增强面板和三种不同的芯结构组成，其中两种类型的铝泡沫和一种Nomex蜂窝。通过光学记录和分析撞击器轨迹获得撞击事件期间的力。使用X射线计算机断层扫描评价冲击变形。一个能量平衡模型，以前用于传统的低速影响的情况下，被施加到预测的峰值力在影响过程中依赖于冲击速度，包括所描述的数据。与文献的比较和模型与测量值的一致性证明了该模型对该负载情况的适用性。确定并定性评估了夹层组合物对冲击行为影响的系统描述。
An important, but insufficiently explored load case for sandwich composites is an impact by a small object. This contribution investigates sandwich panels exposed to such an impact event. The sandwich panels consist of carbon fiber reinforced face sheets and three different core structures, among them two types of aluminum foam and one Nomex honeycomb. The forces during the impact event were obtained by optically recording and analyzing the impactor trajectory. The impact deformation was evaluated using X-Ray computed tomography. An energy balance model, previously used for conventional low-velocity-impact cases, was applied to predict the peak force during impact dependent on the impact velocity, including the described data. The comparison to literature and the coherence of the model to the measured values demonstrated the suitability of the model for this load case. A systematic description of the influences of the sandwich composition on the impact behaviour was identified and qualitatively evaluated.