Automated Delamination Onset and Growth Prediction in Composite Structures

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-07-C-5015
Agency Tracking Number: F061-092-1317
Amount: $829,633.00
Phase: Phase II
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: AF06-092
Solicitation Number: 2006.1
Small Business Information
9 Glodfinch Terrace, East Lyme, CT, 06333
DUNS: 610056405
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jim Lua
 Senior Principal Scientis
 (860) 398-5620
Business Contact
 Jim Lua
Title: President
Phone: (860) 367-4970
Research Institution
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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