Multidisciplinary impact damage prognosis methodology for hybrid structural propulsion systems

This work presents a detailed methodology for comprehensive crashworthiness analysis of hybrid or composite structures jet engine forward sections when subjected to soft impact. Effective strategies are developed within an explicit finite element framework for modeling a bird, intra-ply and inter-ply composite damage, and hybrid structural failure. These techniques are then combined to form a full multiphysics, multiscale crashworthiness analysis methodology. Hybrid fan blade fracture, leading edge de-bonding, composite casing delamination, and other progressive damage effects are captured. The methods developed thus far have the potential to accurately capture the full spectrum of forward section impact damage.

► Novel multiphysics crashworthiness methodology for advanced propulsion was created.
► Strategies to substantially reduce the analysis time were introduced.
► Part failure and subsequent engine component interactions and damage were captured.
► Progressive failure, hybrid debonding and degradation were coupled in one analysis.