Numerical and Statistical İnvestigation Of The Effect Of Composite Layer Thickness On Low-Velocity İmpact Behaviour in Fibre Metal Laminate Materials

In the field of aviation, reducing fuel costs by designing lighter vehicles and thus producing more environmentally friendly aircraft is one of the most important issues. This situation has led aircraft manufacturers to search for lighter and more durable materials. For this reason, Fibre Metal Laminate (FML) structures, which are used especially in the aerospace industry due to their superior fatigue and impact resistance properties, attract attention. Carbon fibre reinforced aluminium plates (CARALL), the most unique member of the FML hybrid structure family, has attracted the attention of researchers. In this study, the low velocity impact behaviour of CARALL FML structures with different composite layer thicknesses at different energy loading (8J-12J-18J) and different impactor types (Ø15 and Ø20) were statistically investigated. CARALL FML structures were modelled in 2/1 arrangement (Al-〖0°〗_([1])-Al, Al-〖0°〗_([3])-Al, Al-〖0°〗_([5])-Al) in LS-DYNA finite element programme. It is observed that the peak load Fmax increases with increasing energy loading. The increase in striker diameter decreased the amount of absorbed energy and increased the rebound.