Predictive Models for the High Cycle Fatigue Behaviour of Fibre Reinforced Laminates in Advanced Aerostructures

The achievement of more eco-efficient aircraft with reduced CO₂ and NO_x emissions has led to the development of innovative engine solutions. One of the most valuable technologies is seen in the Contra Rotating Open Rotor (CROR) propulsion system. However, the integration of this engine technology requires changes in aircraft architecture that lead to several challenges in the field of structural integrity. In an attempt to overcome these challenges, carbon fibre reinforced polymer (CFRP) materials have been investigated as a material solution that can withstand the high dynamic loads transferred to the aircraft primary structure via the large pylon that is connected to the engine.

For CFRP materials to address the challenges of the CROR technology, a comprehensive simulation framework that can account for environmental (temperature and humidity) effects on fatigue life need to developed. In this work, advanced simulation methods are presented within a general framework for high cycle fatigue life prediction of CFRP structures. The numerical models include damage mechanics, delamination crack growth, and the effects of high frequency (self-heating) and environment on fatigue life predictions.