Numerical and experimental analysis of composite wing spars having different cross sections, used in aerospace


Thesis Type: Postgraduate

Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey

Approval Date: 2014

Student: MUHARREM CAN

Supervisor: YAVUZ ZÜMRÜT

Abstract:

In this study, load carrying capacity of C type composite spars used in aircraft wing boxes and having different cross sections were examined. The aircraft wingbox consists of two C spars, two skins and ribs. In the study, three different types of C spars which have the same composite ply sequence in cap and web but have different composite ply drop off types from cap to web were investigated. A series of experiments were conducted in order to determine the effects of composite ply drop off types on the load carrying capacity of C spars. During the experiments, strain data were recorded by using strain gauges. Moreover finite element models of these three types of spar parts were created and failure loads, strains and deformations were calculated. As a conclusion it is shown that cap to web composite drop off type is an important parameter on load carrying capacity. Furthermore the specific strengths of three different spar parts (failure load/weight) were compared to each other.