Simplified Analytical Procedure for Prediction of Fracture Damage in Composite Structures (MSC P1B16-203)

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$69,948.00
Award Year:
2002
Program:
SBIR
Phase:
Phase I
Contract:
N00014-02-M-0142
Agency Tracking Number:
N02-069-07
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Materials Sciences Corp.
500 Office Center Drive, Suite 250, Fort Washington, PA, 19034
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
075537910
Principal Investigator:
Gerald Flanagan
Technical Director
(215) 542-8400
flanagan@materials-sciences.com
Business Contact:
Adam Rosen
Chief Financial Officer
(215) 542-8400
adam@materials-sciences.com
Research Institution:
n/a
Abstract
"A software package is needed that can efficiently model typical composite bonded and co-cured joints used in Naval ship construction. This package must be able to accurately compute the strain-energy-release-rate for user defined cracks. MaterialsSciences Corporation (MSC) has an existing code called SUBLAM that performs this operation using closed-form solutions of high-order plate assemblages. When plates are stacked, the interfacial tractions and displacements are computed exactly (within theassumptions of the plate theory). This approach leads to accurate interlaminar stresses and, therefore, accurate fracture calculations. The plates can be assembled in a manner similar to the finite element method, allowing one to model complex jointconfigurations. Many validation problems have shown the code to be highly accurate. For the Phase I SBIR, MSC will modify this code to more directly applicable to the structures of concern, and will demonstrate a graphical user interface. The userinterface will include predefined parametric models of typical joints. Similar aids will be created to interpret the output so that failure predictions, and failure interaction diagrams are automatically generated. Failure loads of joints for compositestructures are notoriously difficult to predict. This project will result in a user-friendly, efficient, and accurate software product that will enable engineers to rapidly assess typical joints. The

* information listed above is at the time of submission.

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