Reliable Captive Structural Panel Fasteners

Period of Performance: 10/25/2000 - 04/25/2001


Phase 1 SBIR

Recipient Firm

Navmar Applied Sciences Corp.
65 West Street Road Array
Warminster, PA 18974
Principal Investigator


This SBIR proposes the development and demonstration of a captive panel fastener that can transfer shear loads; has a high fatigue life, low failure rate, low weight, and high reusability. The panel fastener will work in composites or metals and be impervious to environmental effects, while maintaining captive properties to reduce the risk of foreign object damage (FOD). The new panel fastener will not require modification of the V-22 structure. The Operational Evaluation report will be used as guidance, in addition to the Reliability and Maintainability data which has been accumulated to date, to determine the failure modes of the fastener. All the components of the fastener assembly will be analyzed to assess which are functioning properly, and identify those, which need to be further, developed. The functioning, and interaction of the individual components will be studied carefully to establish design configurations which will be more reliable. Geometric and material changes will be considered to provide the added performance. Analyses will be performed as necessary to assure that the joint strength and fatigue life will not be adversely affected by the modifications. Testing will be conducted to determine the optimal modification and demonstrate that it out performs the production configuration.The requirements for modern and future commercial aircraft should not be any more demanding than the V-22. Composite materials are being used more widely in the commercial sector also. This fastener will be readily adaptable to any commercial variant, and will provide the same benefits of improved reliability, and availability for commercial aviation as it will for the V-22. As composite applications expand commercially, this fastener will have Industrial and Marine applications.