Integrally 3D Woven/3D Braided Composite Joining Elements For Ship Construction

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$747,053.00
Award Year:
2006
Program:
SBIR
Phase:
Phase II
Contract:
N00167-06-C-0004
Award Id:
70094
Agency Tracking Number:
N041-093-0325
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:
Mansour Mohamed
Chief Scientific Officer
(919) 481-2500
mansourm@3tex.com
Business Contact:
Andrew Watson
Corporate Secretary/Contr
(919) 481-2500
watsona@3tex.com
Research Institute:
n/a
Abstract
During Phase I, 3TEX designed universal, one-piece, 3D woven fiber preforms which can be used as either a "Butt" (H) joint or as a "P" joint as needed. Composite joints were fabricated and tested, demonstrating the benefit of the integral nature of the 3D preforms. 3D stress/strain and crack propagation analysis of composite Π-joint was performed using 3D MOSAIC code. 3D displacement, strain and stress fields, and energy release rates in the joint with and without the "noodle" crack were computed and compared to the critical value. Applied displacements corresponding to failure initiation were predicted. Composite panels made with one ply of thick 3WEAVET preform were drilled and tapped for various bolt sizes and tested. 3D reinforcement provided thread strengths exceeding that of the steel bolts in the composite panel without inserts. Novel joining methods are proposed for the Phase II work for Navy ship construction with particular emphasis on application to DD (X). The joints are practical, more robust, and of a lower cost than current designs using 2D laminates. Phase II will elaborate on, document, and demonstrate practical application of the devised systems. The 3WEAVEO methods and machinery to produce the novel joining systems are available for immediate production.

* 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