Inverse Finite Element Method Investigation for Adaptive Structures Project

Most Structural health monitoring algorithms do not realistically predict the characteristics of a structure to give a good overall pictures of the health of the system. The purpose of this technology project is to demonstrate and validate the Inverse FEM method on an adaptive compliant trailing edge structure. The inverse problem of real-time reconstruction of full field structural displacements is addressed through the application of a new variation formulation leading to versatile, robust and computationally efficient inverse shell finite element analysis. Utilizing surface strain measurements from strain sensors mounted on the load-carrying structural components, the methodology enables accurate computations of the three-dimensional displacement field. This high fidelity computational technology is essential for providing feedback to the actuation and control systems of the next generation of aerospace vehicles.

This technology is being explored on NASA funded projects for deformation and full field strain measurement. It provides the following benefits: Accurate: Algorithm is capable of accurate full-field structural shape and strain measurement Economical: Uses a minimum number of sensors to recreate the full-field structural deformations and strains Improves safety: Enables more efficient health monitoring of control surfaces and flexible structures. The space industry can benefit from this technology as they look for ways to save weight in their structures. The health monitoring aspect of this technology will allow industry to verify that adequate safety margins still exist as they reduce structural weight.

This is early/mid-stage (TRL 4) — the most realistic path in is NASA SBIR/STTR, which funds small businesses and research institutions to develop technology aligned with NASA's needs (equity-free, phased funding). Check whether a current SBIR/STTR solicitation topic overlaps with this project's technology area, or contact the project directly (above) to ask.

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