The Cracks Propagation Calculations in the PZL-130 Orlik Structure

The article presents the results of research carried out under a research project on the evaluation of fatigue life. The subject of the analysis was the critical elements of the PZL-130 Orlik. The numerical crack growth analyses were performed using the NASGRO equation. The Orlik aircraft are mainly used for the basic pilot training in the Polish Air Force. Each airplane is equipped with a digital flight data recorder. The record of more than 36000 flight hours is the basis for numerical analysis of fatigue life.