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Innovative Approaches for Improving Progressive Damage Modeling and Structural…

Award Information

Agency:
Department of Defense
Branch:
Navy
Award ID:
92365
Program Year/Program:
2009 / SBIR
Agency Tracking Number:
N091-008-0740
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Technical Data Analysis, Inc.
3190 Fairview Park Drive Suite 650 Falls Church, VA -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2009
Title: Innovative Approaches for Improving Progressive Damage Modeling and Structural Life Prediction of Airframes
Agency / Branch: DOD / NAVY
Contract: N68335-09-C-0272
Award Amount: $79,879.00
 

Abstract:

Technical Data Analysis, Inc. (TDA) proposes to create a functional link between a finite element solver and UNIGROW, a fatigue and fracture mechanics program implementing the two-parameter approach to fracture mechanics developed by TDA and Dr. Grzegorz Glinka of the University of Waterloo, with support from ONR. This link will enhance the capability of both programs by providing a means of analysis automation for fatigue crack growth. Currently, fracture mechanics analysis relies on simplified models based on empirical rules to determine stress intensity factors. However, the sometimes poor correlation of these models to real structure leads to a large amount of uncertainty in fatigue crack growth calculations. The proposed product will allow any real structure to be analyzed for crack growth using the well established weight function methodology. After creating a component finite element model, a simple linear static analysis will determine stress distributions on any number of user-identified or automatically-identified crack planes. Those stress results will be linked to UNIGROW, which will utilize the weight function approach to determine accurate stress intensity factors and fatigue crack propagation. The end result will be enhanced fracture mechanics analysis capability, leading to safer, more efficient designs.

Principal Investigator:

Nagaraja Iyyer
Director of Engineer
7032371300
niyyer@tda-i.com

Business Contact:

G. Bradfield
Director of Engineer
7032371300
sbradfield@tda-i.com
Small Business Information at Submission:

TECHNICAL DATA ANALYSIS, INC.
7600A Leesburg Pike Suite 204, West Building Falls Church, VA 22043

EIN/Tax ID: 541869259
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No