Non-Linear Finite Element Analysis of Viscoelastic Materials

摘要

Many aircraft structures and engine components are subjected to extreme aero-vibroacoustic environments, including high g-loads. High cycle fatigue due to resonant vibrations on these components causes cracking and other degradation that reduces both operational capability and life. It would be useful if viscoelastic materials could be used to damp the vibration of such structures, however the behavior of a viscoelastic material in an extremely high g-loading is not well understood. The objective of this study was to investigate the need to account for the non-linear material characteristics of viscoelastic materials in order to obtain accurate stress distribution predictions. This will contribute to understanding the appropriate analytical procedure(s) for use in designing viscoelastic damping material into gas-turbine blades.