Automated Delamination Onset and Growth Prediction in Composite Structures

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$750,000.00
Award Year:
2007
Program:
SBIR
Phase:
Phase II
Contract:
FA8650-07-C-5015
Award Id:
79053
Agency Tracking Number:
F061-092-1317
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
GLOBAL ENGINEERING & MATERIALS, INC. (Currently Global Engineering and Materials, Inc)
9 Glodfinch Terrace, East Lyme, CT, 06333
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
610056405
Principal Investigator:
Jim Lua
Senior Principal Scientis
(860) 398-5620
jlua@gem-consultant.com
Business Contact:
Jim Lua
President
(860) 367-4970
jlua@gem-consultant.com
Research Institution:
n/a
Abstract
An automatic software tool for damage tolerance assessment and residual strength prediction of composite structures based on the extended finite element (XFEM) will be developed. This tool will for the first time be able to model arbitrary 2D/3D delamination crack growth without remeshing. The automated tool will be integrated with the ABAQUS implicit solver via its user-defined subroutines. GEM has secured commitments for technical support and commercialization assistance from LM Aero, Bell Helicopter, ABAQUS, and MSC. Our consultant, Professor Ted Belytschko, who pioneered XFEM, will aid in basic theory development, tool development, and provide existing XFEM solution modules that are relevant to delamination failure prediction. The XFEM methodology for a 2D delamination crack was demonstrated in Phase I. The unique features of the Phase II software product are: 1) the capability for arbitrary insertion of multiple initial delamination cracks into any finite element mesh at either element boundaries or within elements via a PATRAN GUI; 2) simulation of arbitrary crack growth without remeshing; 3) accurate extraction of strain energy release (SERR) rate along an arbitrary crack front with or without closure via a modified VCCT technique; and 4) characterization of delamination onset and growth results via PATRAN and ABAQUS's CAE.

* information listed above is at the time of submission.

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