Center Innovation Fund: MSFC CIF
Piezoelectric Washer for Accurate Application of Bolt Preload
Project Introduction
A concept is proposed for monitoring bolt preload that offers accuracy and low-cost features 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.
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Anticipated Benefits
Develop a low-cost method to accurately measure the preload in a structural bolt assembly for spaceflight missions.
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Primary U.S. Work Locations and Key Partners
| Organizations Performing Work | Role | Type | Location |
|---|---|---|---|
Marshall Space Flight Center
(MSFC)
|
Lead Organization | NASA Center | Huntsville, AL |
| The University of Alabama in Huntsville | Supporting Organization | Academic |
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Organizational Responsibility
Responsible Mission Directorate:
- Space Technology Mission Directorate (STMD)
Lead Center / Facility:
- Marshall Space Flight Center (MSFC)
Responsible Program:
- Center Innovation Fund: MSFC CIF
Project Management
Program Director:
Principal Investigator:
Project Duration
Start: Oct 2015
End: Sep 2016
Technology Maturity (TRL)
| Start: | 2 |
| Current: | 2 |
| Estimated End: | 4 |
Applied Research
Development
Demo & Test
Technology Areas
Primary:
- TA 12 Materials, Structures, Mechanical Systems and Manufacturing
- TA 12.3 Mechanical Systems
- TA 12.3.3 Electro-Mechanical, Mechanical, and Micromechanisms
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