NESB Nondestructive Evaluaton Sciences Branch

Physics Based Modeling of Wave Propagation

NESB is currently developing advanced physics-based ultrasound models and simulation tools for aerospace materials, including composites. The goal of this area of research is rapid, 3-dimensional (3D) simulation tools for modeling ultrasonic wave behavior in complex geometry advanced material aerospace components, including wave interaction with realistic damage. Of-interest damage types include delaminations, microcracking, and weak adhesive bonds.

Realistic physics-based models and simulation tools can enhance the optimization of nondestructive evaluation (NDE) and structural health monitoring (SHM) techniques. Such tools can also enable inspectability predictions and methods for SHM system validation. Simulations can also be used to aid the understanding of experimental results.

These capabilities are essential for NASA's future spaceflight missions, particularly long duration human spaceflight missions, where vehicle health monitoring will be of key importance to mission success. NDE and SHM simulation tools are also of key importance for NASA's aeronautics work towards ensuring safety, reliability, and durability of next generation vehicles.

Related Publications:

C.A.C. Leckey, M. Rogge, C. Miller, M. Hinders. "Multiple-mode Lamb Wave Scattering using 3D Elastodynamic Finite Integration Technique". Ultrasonics. Vol 52, pp 193-207 (2012).

C.A.C. Leckey and M.K. Hinders. "3D modeling of ultrasonic wave interaction with disbonds and weak bonds" Review of Progress in QNDE, (2012) (in press)