Ercümen K. M., Acar E.

4. ULUSLARARASI BİLİMSEL ÇALIŞMALAR KONGRESİ, Girne, Cyprus (Kktc), 8 - 10 September 2023, pp.1-11

  • Publication Type: Conference Paper / Full Text
  • City: Girne
  • Country: Cyprus (Kktc)
  • Page Numbers: pp.1-11
  • Erzincan Binali Yildirim University Affiliated: Yes


Honeycomb composite structures have gained significant popularity in the field of aviation

engineering, primarily owing to their advantageous properties such as reduced weight,

customizable rigidity and durability, exceptional resistance to fatigue, and cost-effective

manufacturing methods. Strength/weight ratios of these structures, which consist of cells in the

form of honeycombs, are quite high when compared to other metallic materials. For this reason,

honeycomb composite structures are preferred in the structure of main flight controls such as

rudder and elevator in aircraft. However, failures that may occur in these structures may

adversely affect flight safety. Water formation in honeycomb structures is undesirable. Because

airplanes see negative temperature values during flight phases. The temperature value is

approximately -50°C. The water ingressed inside the honeycomb composite structure will

freeze and an increase in volume will occur. This will cause damage to the structure over time.

In this study, the presence of water in the rudder, which is one of the main control surfaces of

the aircraft, was checked by thermography method. As a result of the control, it was seen that

the area of the water detected in the hoist point on the left side of the rudder was above the

allowable limit. A repair area of 185x185 was created to include the area with water. The

honeycomb structure containing water was removed and replaced with a new one. As a result

of this repair, the water ingressed inside the honeycomb composite structure was completely

cleaned. It was determined that the water was completely removed by checking with a thermal

camera again.