Fracture Evaluation and Design Tool for Welded Aluminum Ship Structures Subjected to Impulsive Dynamic Loading

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-12-C-0163
Agency Tracking Number: N10A-041-0223
Amount: $586,000.00
Phase: Phase II
Program: STTR
Awards Year: 2012
Solicitation Year: 2010
Solicitation Topic Code: N10A-T041
Solicitation Number: 2010.A
Small Business Information
Weidlinger Associates, Inc.
375 Hudson St FL 12, New York, NY, -
DUNS: 061226106
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Pawel Woelke
 Principal Investigator
 (212) 367-3000
 woelke@wai.com
Business Contact
 Susan Hamner
Title: Contracts Manager
Phone: (202) 649-2444
Email: hamner@wai.com
Research Institution
 University of South Carolina
 Steven Etheredge
 Research Foundation
901 Sumpter Street, Suite 501
Columbia, SC, 29208-
 (803) 777-4457
 Nonprofit college or university
Abstract
Aluminum as a structural material for naval applications has a number of advantages over steel, owing mainly to significant weight reductions which translate to higher speed and range attainable by aluminum vessels. A comprehensive study of research needs for aluminum structures identified the key research areas, which included material behavior and fracture evaluation of welded aluminum structures subjected to dynamic loading. In order to meet the Navy"s needs for high speed aluminum vessels, a new, accurate and efficient fracture evaluation methodology for welded and unwelded aluminum components is proposed. The new constitutive model will be formulated in the context of ductile fracture mechanics and will account for anisotropic, nonlinear and rate dependent behavior of aluminum sheets. After validation, the constitutive model will be used to develop a fast assessment tool for evaluation of ultimate strength of ship components, as well as accurate and efficient estimates of the operational recoverability of the aluminum ships subjected to extreme events. Efficient and accurate fracture evaluation methodology, as well as the fast assessment tool allowing for both detailed simulation of the fracture process and fast assessment of ultimate strength of aluminum ship components could lead to great savings in military and commercial applications.

* information listed above is at the time of submission.

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