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

Award Information

Department of Defense
Award ID:
Program Year/Program:
2006 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
3TEX, Inc.
109 MacKenan Drive Cary, NC -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2006
Title: Integrally 3D Woven/3D Braided Composite Joining Elements For Ship Construction
Agency / Branch: DOD / NAVY
Contract: N00167-06-C-0004
Award Amount: $747,053.00


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.

Principal Investigator:

Mansour Mohamed
Chief Scientific Officer

Business Contact:

Andrew Watson
Corporate Secretary/Contr
Small Business Information at Submission:

109 MacKenan Drive Cary, NC 27511

EIN/Tax ID: 561990412
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No