The Aircraft Structural Elements Corrosion Study Using Strain Gauge Method and Pulse Video Thermography

 

Ljubiša Tomić

Dalibor Jovanović

Stevan Jovičić

Radovan Karkalić

Goran Dikić

 

Simultaneous influence of corrosion, static and dynamic loads on the elements of aircraft structures influence to a large extent their mechanical properties and the foreseen length of their service. The paper presents the influence of corrosion on physical and mechanical properties of the test bars made from materials for a wide range of applications which are used in aircraft structural elements manufacturing. Study comprises laboratory testing of bars for the simultaneous influence of corrosive environment, static and dynamic load. The problems are pinpointed regarding the use of strain gauges for continuous monitoring of the condition in real time. In addition, this paper deals with a modern non-destructive testing and evaluation system (NDT&E), whose operation is based on thermal image processing. Thermographic method has been used to detect a hidden corrosion in the aircraft structure in real life. The study results have shown the possibility of NDT application in simple and quick detection of areas affected by corrosion that are visually invisible

Key words: corrosion, corrosion fatigue, corrosion testing, non-destructive testing, strain gauge, thermography, IR thermography, aviation application, aircraft structure, life-cycle testing.