Investigation of the dynamic response and damage formation in a sandwich composite structure with a square cellular core produced by slot insertion technique under low velocity impact
Project no. 23300 · Status: Kapanmış (Yayın bekleniyor) · 2022
Summary
<p>Sandwich composite structures stand out with their impact absorption, thermal and acoustic insulation properties. Therefore, one of the areas where sandwich composites find widespread use is the outer parts of the structures that are likely to be exposed to impact. For industries where lightness is very important, such as aviation, maritime and automotive, it is essential to develop composite sandwiches with both high impact resistance and low weight. It is seen that pvc foam, nomex honeycomb and corrugated aluminum, which are in standard forms in the market, are often preferred as core materials in the most widely used sandwich composite panels . This limits the ability of the core to be customized according to the needs of the applications.</p><p><br></p><p>In this project, the focus will be on sandwich structures, whose outer surfaces and cores will be manufactured from carbon fiber reinforced composite plates, so that the mechanical properties of the core can be changed by parameters such as carbon fiber density, orientation and number of layers. In the manufacture of the sandwich composite, a method called the slot technique, which allows the manufacture of sandwich composite panels with the help of notches and adhesives on the plates, will be used. Afterwards, these manufactured panels will be subjected to low-speed impact tests and the effect of parameters such as the number of layers, fiber angles and fiber density on the panels will be observed. In addition, the results obtained will be compared with the literature data of sandwich composite panels, which are widely available in the market, and it will be tried to design a panel that will absorb more impact energy and undergo less deformation in low-speed impact at the same impact energy level.</p><p><br></p><p>In addition, a finite element model will be developed that can help to better understand the damage mechanisms that affect the low-velocity impact strength of the panels.</p>