Damage assessment on numerical modelling of rotating engine blades subjected to bird strike

This paper presents a numerical modelling of rotating engine blades subjected to bird strike using SPH modelling. Several assumptions have been made to model the bird as a gelatine structure and geometry and material model is utilised in this study. The bird model itself is modelled as a Smoothed Particle Hydrodynamics (SPH) to accurately represent a real bird impact especially during take-off and landing. As such, the engine blades impacted by the bird is modelled as a tetrahedron elements in commercial software of LS-DYNA. The engine is rotating in the z-axis at 200 rad/s counter-clockwise. The material of the blade is modelled with a Johnson-Cook failure constants. The numerical framework is validated with previous literature. The computational results are presented as effective stresses and shows that the structural damage due to impact is significant such that the bird strike causes deflection that will damage the engine blades