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Bonded Joint Analysis Method

Award Information

Department of Defense
Award ID:
Program Year/Program:
2012 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2012
Title: Bonded Joint Analysis Method
Agency / Branch: DOD / NAVY
Contract: N68335-12-C-0378
Award Amount: $79,999.00


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.

Principal Investigator:

Jim Lua
(860) 398-5620

Business Contact:

Jim Lua
(860) 398-5620
Small Business Information at Submission:

Global Engineering and Materials, Inc.
11 Alscot Drive East Lyme, CT 06333-

EIN/Tax ID: 061628123
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
Virginia Tech
Engineering Sci. and Mechanics
Virginia Tech
Blacksburg, VT 24061-
Contact: Romesh C. Batra
Contact Phone: (540) 231-6051