Djemaoune Younes, Krstic Branimir, Rasic Stefan, Radulovic Daniel, Dodic Marjan
Section of Aerospace Engineering and Mechanics, Department of Military Mechanical Engineering, Military Academy, University of Defence in Belgrade, Military Academy, 11042 Belgrade, Serbia.
Department of Aerospace Engineering, Military Technical Institute, 11030 Belgrade, Serbia.
Materials (Basel). 2021 Sep 1;14(17):4992. doi: 10.3390/ma14174992.
This paper aims to investigate the crashworthiness performance degradation of a damaged 5052 aluminum honeycomb panels under in-plane uniaxial quasi-static compression and the possibility of improving it using reinforcement tubes. The in-plane crushing behaviors and energy absorption capacities of the intact, damaged, and tube-reinforced damaged panels with different damage sizes in both X and X directions are numerically simulated by using the nonlinear FE method Abaqus/Explicit, and the crashworthiness performances are compared with each other. The validation of finite element model involves comparing the obtained simulation results with theoretical and experimental ones. Very good agreement between numerical, experimental, and theoretical results is achieved. The first maximum compressive load and the mean crushing load of the different honeycomb configurations are analyzed and compared through the load-strain curves. The energy absorption capacity of the damaged and the tube-reinforced damaged panels is calculated and then compared with their corresponding intact ones. The deformation modes are explained in detail. The obtained results show that the crashworthiness performance degradation is directly proportional to the damage size as well as the insertion of reinforcement tubes considerably improves in-plane crushing resistance of damaged honeycomb panels.
本文旨在研究受损5052铝蜂窝板在平面内单轴准静态压缩下的抗撞性能退化情况，以及使用加强管改善其性能的可能性。采用非线性有限元方法Abaqus/Explicit，对不同损伤尺寸的完整、受损以及用管加强的受损蜂窝板在X和X方向的平面内压缩行为和能量吸收能力进行了数值模拟，并对其抗撞性能进行了相互比较。有限元模型的验证包括将所得模拟结果与理论和实验结果进行比较。数值、实验和理论结果之间取得了很好的一致性。通过载荷-应变曲线分析和比较了不同蜂窝结构的首次最大压缩载荷和平均压缩载荷。计算了受损和用管加强的受损蜂窝板的能量吸收能力，然后与相应的完整蜂窝板进行了比较。详细解释了变形模式。所得结果表明，抗撞性能退化与损伤尺寸成正比，并且插入加强管显著提高了受损蜂窝板的平面内抗压缩能力。
