Kosicka Ewelina, Borowiec Marek, Kowalczuk Marcin, Krzyzak Aneta
Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland.
Faculty of Aeronautics, Military University of Aviation, Dywizjonu 303 No. 25, 08-521 Deblin, Poland.
Materials (Basel). 2021 Nov 15;14(22):6897. doi: 10.3390/ma14226897.
The aim of this study was to determine the effect of a selected physical modifier with different granularity and mass percentage on the dynamics of aerospace polymer composites. The tests were carried out on samples made of certified aerospace materials used, among other purposes, for the manufacture of aircraft skin components. The hybrid composites were prepared from L285 resin, H286 hardener, GG 280T carbon fabric in twill 2/2 and alumina (AlO, designated as EA in this work). The manufactured composites contained alumina with grain sizes of F220, F240, F280, F320 and F360. The mass proportion of the modifier in the tested samples was 5% and 15%. The tested specimens, as cantilever beams fixed unilaterally, were subjected to kinematic excitation with defined parameters of amplitude and frequency excitation in the basic resonance zone of the structure. The results, obtained as dynamic responses, are presented in the form of amplitude-frequency characteristics. These relationships clearly indicate the variable nature of composite materials due to modifier density and grain size. The novelty of this study is the investigation of the influence of the alumina properties on system dynamics responses.
本研究的目的是确定具有不同粒度和质量百分比的选定物理改性剂对航空航天聚合物复合材料动力学的影响。测试是在由经认证的航空航天材料制成的样品上进行的，这些材料用于制造飞机蒙皮部件等用途。混合复合材料由L285树脂、H286固化剂、2/2斜纹的GG 280T碳纤维织物和氧化铝（AlO，在本工作中指定为EA）制备而成。所制造的复合材料含有粒度为F220、F240、F280、F320和F360的氧化铝。测试样品中改性剂的质量比例为5%和15%。作为单侧固定的悬臂梁的测试样本，在结构的基本共振区内受到具有确定振幅和频率激励参数的运动激励。作为动态响应获得的结果以幅频特性的形式呈现。这些关系清楚地表明了由于改性剂密度和粒度导致的复合材料的可变性质。本研究的新颖之处在于研究氧化铝性能对系统动力学响应的影响。
