Innovative Joining and Repair Methodologies Using Hybrid Textile Preforms

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$69,990.00
Award Year:
2007
Program:
STTR
Phase:
Phase I
Contract:
N00014-07-M-0440
Award Id:
83444
Agency Tracking Number:
N074-021-0395
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
109 MacKenan Drive, Cary, NC, 27511
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
030936335
Principal Investigator:
Alex Bogdanovich
VP of Research
(919) 481-2500
bogdanovicha@3TEX.COM
Business Contact:
Andrew Watson
Controller
(919) 481-2500
watsona@3tex.com
Research Institution:
TEXAS A&M
Ozden Ochoa
3406 TAMU
188 Bizzell, 006 Wisenbaker
College Station, TX, 77843 3406
(979) 845-2022
Nonprofit college or university
Abstract
Strength, durability and reliability of commonly used bonded and bolted composite-to-metal structural joints suffer from sharp geometry variations, mismatch of elastic properties, coefficients of thermal expansion and thermal conductivity of the adherends, altogether causing high stress concentration and premature failure of adhesive bonded joints. The proposed work offers substantial enhancement of composite-to-metal bonded joints (including lap and butt joints, joints of composite skins and stiffeners, D-joint elements and other similar connectors) and metal repair with composite patches. The primary focus is on joining steel structural components to glass and carbon fiber 3-D woven and 3-D braided fabric preforms and composites. The two key features of this joining methodology are: (1) using hybrid preforms which incorporate metal filaments, multi-filament yarns, wires or cables and (2) welding or brazing such preforms to the metallic structures. The implementation of this new concept of composite-to-metal joining and metal repair will allow, as anticipated, to significantly increase strength and durability of dissimilar material joints. Design and manufacturing of special fabric preforms, fabrication of experimental joints samples and their experimental evaluation will be performed and supported by 3-D micromechanics modeling and predictive analysis of stress/strain fields, progressive failure, and fracture.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government