Bonded Joint Analysis Method

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-12-C-0378
Agency Tracking Number: N12A-004-0051
Amount: $79,999.00
Phase: Phase I
Program: STTR
Awards Year: 2012
Solicitation Year: 2012
Solicitation Topic Code: N12A-T004
Solicitation Number: 2012.A
Small Business Information
Global Engineering and Materials, Inc.
11 Alscot Drive, East Lyme, CT, 06333-
DUNS: 610056405
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jim Lua
 President
 (860) 398-5620
 jlua@gem-innovation.com
Business Contact
 Jim Lua
Title: President
Phone: (860) 398-5620
Email: jlua@gem-innovation.com
Research Institution
 Virginia Tech
 Romesh C Batra
 Engineering Sci. and Mechanics
Virginia Tech
Blacksburg, VT, 24061-
 (540) 231-6051
 Nonprofit college or university
Abstract
A combined discrete cohesive interface fracture and continuum damage mechanics initiation and propagation toolkit for Abaqus will be developed for the residual strength prediction of adhesively bonded composite structures subjected to multi-axial loading. This tool will allow us, for the first time, to be able to simulate concurrently both the continuum and discrete damage progression at the bonded interface and in the adhesive, respectively, under multiaxial loading. To capture the highly nonlinear material constitutive response and the environmentally-driven mechanical properties along the bondline, the adhesive layer will be characterized explicitly without introducing a smearing procedure. An advanced cohesive fracture model will be developed to account for the combined energy dissipation from decohesion, frictional sliding, and yielding. A hydrostatic stress dependent plasticity model coupled with a continuum shell description will be implemented to capture the damage accumulation in a thin adhesive layer subjected to a combined tension/compression/shear loading. Testing will be performed to identify model parameters and to validate the toolkit at coupon and component levels. GEM has secured commitments for technical support from Virginia Tech, Lockheed Martin, Sikorsky, and Air Force Research Lab.

* information listed above is at the time of submission.

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government