Student : Dr. Yanfeng Shen
Sponsor : National Rotorcraft Technology Center (NTRC) Vertical Lift/Rotorcraft Center of Excellence (VLRCOE)
A highly efficient hybrid modeling technique was developed for the efficient simulation of guided wave generation, propagation, and interaction with damage in complex composite structures.
- A local finite element model (FEM) was deployed to capture the piezoelectric effects and actuation dynamics of the transmitter, while the global domain wave propagation and interaction with structural complexity (structure features and damage) were solved utilizing a local interaction simulation approach (LISA).
- The global LISA framework was implemented using the Compute Unified Design Architecture (CUDA) running on Graphics Processing Unit (GPU).
- The global LISA framework was also extended through the 3-D Kelvin-Voigt viscoelasticity theory to include directional damping effects for composite structures.
- The 3-D LISA formulation was extended to capture the contact-impact dynamics based on the penalty method for the simulation of nonlinear interaction between guided waves and fatigue cracks.