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Piezoelectric Washer for Accurate Application of Bolt Preload
Completed
TRL 4 (started at 2, targeting 4)
Description
A concept is proposed for monitoring bolt preload that offers accuracy and low-cost features not not available in existing preload monitoring systems. Existing washer size and load carrying capability information will be used to initiate the design. The goal is to retrofit the proposed Piezoelectric Fiber Composite Washer (PFCW) into a fastener assembly. PFCW prototypes will be fabricated using 3D printing technology. Comprehensive laboratory tests will be conducted to determine the load-voltage relationship. A prototype of a handheld device will be developed to demonstrate the real-time preload monitoring by relating the load to the collected voltage in the piezoelectric materials.
Benefits
Develop a low-cost method to accurately measure the preload in a structural bolt assembly for spaceflight missions.
Details
| Technology area | Materials, Structures, Mechanical Systems, and Manufacturing > Mechanical Systems > Electromechanical, Mechanical, and Micromechanical Devices |
| Program | Center Innovation Fund: MSFC CIF (MSFC CIF) |
| Lead organization | Marshall Space Flight Center, Huntsville, AL |
| Start date | 2015-10-01 |
| End date | 2016-09-30 |
Project contacts
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How to get involved
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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