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Novel Analytical and Experimental Methods for Evaluating Bolted Joint Repairs…

Award Information

Agency:
Department of Defense
Branch:
N/A
Award ID:
Program Year/Program:
2011 / SBIR
Agency Tracking Number:
F103-146-2236
Solicitation Year:
2010
Solicitation Topic Code:
AF103-146
Solicitation Number:
2010.3
Small Business Information
Stratton Composite Solutions
865 Chestnut Lake Dr Marietta, GA -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2011
Title: Novel Analytical and Experimental Methods for Evaluating Bolted Joint Repairs in Composite Structure
Agency: DOD
Contract: FA8650-11-M-5157
Award Amount: $99,998.00
 

Abstract:

In today"s composite aircraft structures, bolted joints are frequently subject to abuse, overloads, heat damage, or lightning strikes which can damage both the fastener and the surrounding composite material. This damage, when detected, must be repaired. However, little information currently exists to guide the maintainer in the design, analysis, or certification of the repair. SCS proposes to solve this problem through the use of a combined analytical/empirical approach using series of coupon and element tests to establish and validate the empirical parameters needed to accurately match joint strength behavior. This procedure, consisting of an analytical approach combined with a material-specific strength database, would be used to predict the strength of a repaired fastened joint relative to its undamaged strength. Used by itself, this tool will enable maintainers to evaluate repair options and qualitatively determine whether the proposed repair restores the joint to its original, undamaged strength. When combined with the original joint analysis and/or material properties database, the tool could be used to determine the resulting strength. With knowledge of the loads and margins of safety of the individual fasteners, these predictions can then be used to determine repair approaches and techniques. BENEFIT: This testing and development of bolt repair methodology will benefit both commercial and DOD aircraft. This technology will improve the ease and reliability of bolted hole repair on all aircraft. This should increase the safety across the entire DOD and commercial aircraft fleet.

Principal Investigator:

Robert Stratton
owner
(404) 840-3530
bstrat@bellsouth.net

Business Contact:

Robert Stratton
owner
(404) 840-3530
bstrat@bellsouth.net
Small Business Information at Submission:

Stratton Composite Solutions
865 Chestnut Lake Dr Marietta, GA -

EIN/Tax ID: 311842752
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No