The Regularities of Fatigue Crack Growth in Airframes Elements at Real Operation Conditions

2009
Igors Pavelko, Vitālijs Pavelko

The results of analytical and experimental researches concerning predicting of fatigue crack growth in the operating conditions are presented. First of all the main factors causing a fatigue damage initiation and growth are analyzed and divided to two groups. Common conditions of fatigue damage precise predicting are established. The problem of fatigue crack growth at the stresses of variable amplitude was analyzed and an approach of description of this process is performed. Two examples present the efficiency of this approach. Theory of fatigue crack growth indication and the crack growth indicator (CGI) are developed. There is planned and executed a flight experiment using CGI located on two aircraft An-24 and An-26. Results of crack growth in CGI at operational load allowed to evaluate the parameters of generalized Paris-Erdogan law and statistical properties of crack increment per flight.

Atslēgas vārdi
Fatigue crack growth, operation conditions, indication fractography.
DOI
10.1007/978-1-4020-9402-6_22
Hipersaite
http://link.springer.com/chapter/10.1007%2F978-1-4020-9402-6_22?LI=true

Pavelko, I., Pavelko, V. The Regularities of Fatigue Crack Growth in Airframes Elements at Real Operation Conditions. No: Engineering against Fracture: Proceedings of the 1st Conference. Patras: University of Patras, 2009. 275.-290.lpp. ISBN 978-1-4020-9401-9. e-ISBN 978-1-4020-9402-6. Pieejams: doi:10.1007/978-1-4020-9402-6_22

Publikācijas valoda
English (en)