弹道极限
材料科学
芳纶
射弹
蜂窝结构
蜂巢
复合材料
铝
锥面
穿孔
结构工程
芯(光纤)
弹道冲击
夹层结构复合材料
有限元法
工程类
复合数
纤维
冲孔
冶金
作者
Saurabh Rathod,Nikhil Khaire,Gaurav Tiwari
标识
DOI:10.1016/j.compstruct.2022.116048
摘要
This study investigated the perforation phenomenon of aramid and aluminium honeycomb sandwich structures under high-velocity impacts and compared the impact responses experimentally and numerically. The dimension of the face sheets used was 1 mm in thickness and 220 mm in diameter, and for both the honeycomb cores, the cell thickness of 0.05 mm and the cell size of 3.2 mm was used. Ballistic impact tests were conducted by employing a pneumatic air gun to study damage behavior and failure modes under different impact velocities between 35 m/s and 150 m/s using conical shaped and hemispherical shaped projectiles. Three-dimensional finite element models were implemented in ABAQUS/Explicit to model sandwich panels. The numerical model was validated with experimental data and, subsequently, the numerical study was further extended to study the effects of different geometrical parameters affecting the impact response of sandwich structures. The results showed that for the ballistic limit, sandwich structure having an aluminium honeycomb core performed better than the aramid honeycomb core by 3.09% and 2.5% against conical and hemispherical projectiles, respectively. However, the aramid honeycomb structure was proven to be more efficient than the aluminum honeycomb structure in terms of energy absorption and specific energy absorption.
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