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2 Fatigue of Aircraft Structures

2 2018

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Evaluation of Impact Damage in Composite Structures Using Ultrasonic Testing

Wronkowicz-Katunin A., Dragan K.

Fatigue of Aircraft Structures

2018

Iss. 10

82--92

Barely visible impact damage is one of the problems commonly occurring in composite elements during an aircraft operation. The authors described the mechanisms of impact damage formation and propagation in composite structures. The paper presents a performed analysis of an influence of impact parameters on the resulting damage, i.e. its detectability by means of visual observation as well as its extent determined based on ultrasonic tests results. The tests were conducted on the CFRP specimens with a wide range of impact damage cases obtained with combinations of variable impact energy and shapes of impactors. Additionally, an algorithm based on image processing and image analysis methods is proposed for the purpose of the effective evaluation of the ultrasonic data obtained.

A Brief Review on NDT&E Methods For Structural Aircraft Components

Wronkowicz-Katunin A.

Fatigue of Aircraft Structures

2018

Iss. 10

73--81

The paper presents a summary of non-destructive testing and evaluation (NDT&E) methods applied in inspections of structural aircraft components. This brief review covers the most commonly applied methods such as visual and penetrant inspections, tap-testing, eddy current inspections, shearography, thermography, acoustic emission testing, radiographic and tomographic inspections, and ultrasonic inspections. The general operating principles of these methods as well as their main advantages, limitations and application areas are described below.