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Completed TRL 4 (started at 2, targeting 4)
This research project is evaluating an innovative technique that uses fiber optic strain sensors to measure structural deformations and full field strains. An inverse finite element method (iFEM) analysis reconstructs a deformed structural shape based on the strain measurement data simulated by FEM analysis to represent the in-situ strain measurements. By mapping the iFEM displacement solution onto a full FEM model, without the applied loading, the complete fields of displacement, strain, and stress are reconstructed to a high degree of accuracy. This project supports the work on multiple flight research projects at NASA Armstrong.
Work to date: The team has completed and validated a 1-dimensional beam element test using a compliant slider mechanism.
Looking ahead: Future plans involve developing and validating the algorithm on a full size flight test article.
Benefits
Applications
This research project is evaluating an innovative technique that uses fiber optic strain sensors to measure structural deformations and full field strains. An inverse finite element method (iFEM) analysis reconstructs a deformed structural shape based on the strain measurement data simulated by FEM analysis to represent the in-situ strain measurements. By mapping the iFEM displacement solution onto a full FEM model, without the applied loading, the complete fields of displacement, strain, and stress are reconstructed to a high degree of accuracy. This project supports the work on multiple flight research projects at NASA Armstrong.
Work to date: The team has completed and validated a 1-dimensional beam element test using a compliant slider mechanism.
Looking ahead: Future plans involve developing and validating the algorithm on a full size flight test article.
This technology is being explored on NASA funded projects for deformation and full field strain measurement. It provides the following benefits:
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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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