Composite Damage Evaluation Tool (MSC P8053)

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-09-M-3918
Agency Tracking Number: F083-176-2285
Amount: $99,944.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: AF083-176
Solicitation Number: 2008.3
Small Business Information
181 Gibraltar Road, Horsham, PA, 19044
DUNS: 075537910
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Gerald Flanagan
 Technical Director
 (215) 542-8400
Business Contact
 Thomas Cassin
Title: President
Phone: (215) 542-8400
Research Institution
Materials Sciences Corporation (MSC) has plans to modify and enhance an existing modeling approach for damaged composites to address the problem of damage evaluation and repair in composite structures. The discrete damage space homogenization method, or DDSHM, uses a finite element model of a representative volume element (RVE) of material. The analysis includes explicitly modeling of all the possible crack locations within the RVE. By cycling through all the possible crack length combinations and recording energy changes, the system can build up a nonlinear material model that accounts for damage evolution. The nonlinear material model is then used in a conventional structural analysis of a damaged element to determine residual strength. The method will be validated using a series of coupons that provide baseline data, and will demonstrate the ability of the system to track damage growth. MSC will create a software plan that will show how this central element of a complete system will be integrated with nondestructive inspection information, and precompiled parametric finite element models of typical structural elements and repairs. BENEFIT: The proposed research will lead to a software system that can rigorously capture the effects of damage on composite structures. The system will have a direct impact on the ability of Air Force, Navy, and commercial airlines to support composite structures. It will enable operators to determine if repair is necessary, and whether a proposed repair will be effective in returning the structure back to its original performance levels.

* Information listed above is at the time of submission. *

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