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SOLUTION-ADAPTIVE CODE FOR ANALYSIS OF FATIGUE CRACK PROPAGATION IN AEROSPACE…

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
16895
Program Year/Program:
1991 / SBIR
Agency Tracking Number:
16895
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Huntsville Sciences Corp.
2608 Artie St SW Suite 4 Huntsville, AL 35805
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1991
Title: SOLUTION-ADAPTIVE CODE FOR ANALYSIS OF FATIGUE CRACK PROPAGATION IN AEROSPACE STRUCTURES
Agency: NASA
Contract: N/A
Award Amount: $49,198.00
 

Abstract:

THIS PROJECT WILL DEVELOP SOLUTION-ADAPTIVE TECHNIQUES AND ACOMPUTER CODE FOR USE IN ANALYZING FATIGUE-CRACK PROPAGATIONIN AEROSPACE STRUCTURAL COMPONENTS. A FRACTURE ANALYSIS COMPUTATIONAL TOOL WILL BE CREATED USING MODERN ADAPTIVE FINITE ELEMENT TECHNIQUES, EXTRACTION FORMULAS, AND CRACK-PROPAGATION THEORIES. THE CODE WILL BE VIRTUALLY A STAND-ALONE MODULE IN THAT IT WILL REQUIRE NO ADDITIONAL STRUCTURAL MODELING OTHER THAN A DESCRIPTION OF THE MATERIALFLAW. IT WILL BE DEVELOPED AS A POST PROCESSOR TO EXISTING FINITE-ELEMENT PROGRAM PACKAGES. THE FINITE-ELEMENT MODEL OF THE UNFLAWED STRUCTURE WILL BE PREPARED IN THE SAME MANNER AS IS CURRENTLY DONE. FLAWS CAN BE INTRODUCED INTO THESE EXISTING FINITE-ELEMENT MODELS AND THE FRACTURE ANALYSIS PERFORMED IN A MANNER VIRTUALLY TRANSPARENT TO THE USER. WITH VERY LITTLE ADDITIONAL EFFORT THE STRESS ANALYSTCAN THEN PERFORM A FRACTURE-MECHANICS ANALYSIS. PHASE I WILL FOCUS ON SOLUTION-ADAPTIVE ALGORITHM DEVELOPMENT AND WILL UTILIZE STRESS-INTENSITY FACTOR CALCULATIONS FOR FATIGUE-LIFE PREDICTION. PHASE II WILL INCLUDE RESEARCH ANDDEVELOPMENT INTO CONSTITUTIVE THEORIES OF FRACTURE, ACCURATESTRESS RECOVERY PROCEDURES, ADAPTIVE REFINEMENT STRATEGIES, AND DEVELOPMENT AND DELIVERY OF A GENERAL THREE-DIMENSIONAL CODE. THIS PROJECT WILL DEVELOP SOLUTION-ADAPTIVE TECHNIQUES AND ACOMPUTER CODE FOR USE IN ANALYZING FATIGUE-CRACK PROPAGATIONIN AEROSPACE STRUCTURAL COMPONENTS. A FRACTURE ANALYSIS COMPUTATIONAL TOOL WILL BE CREATED USING MODERN ADAPTIVE FINITE ELEMENT TECHNIQUES, EXTRACTION FORMULAS, AND CRACK-PROPAGATION THEORIES. THE CODE WILL BE VIRTUALLY A STAND-ALONE MODULE IN THAT IT WILL REQUIRE NO ADDITIONAL STRUCTURAL MODELING OTHER THAN A DESCRIPTION OF THE MATERIALFLAW. IT WILL BE DEVELOPED AS A POST PROCESSOR TO EXISTING FINITE-ELEMENT PROGRAM PACKAGES. THE FINITE-ELEMENT MODEL OF THE UNFLAWED STRUCTURE WILL BE PREPARED IN THE SAME MANNER AS IS CURRENTLY DONE. FLAWS CAN BE INTRODUCED INTO THESE EXISTING FINITE-ELEMENT MODELS AND THE FRACTURE ANALYSIS PERFORMED IN A MANNER VIRTUALLY TRANSPARENT TO THE USER. WITH VERY LITTLE ADDITIONAL EFFORT THE STRESS ANALYSTCAN THEN PERFORM A FRACTURE-MECHANICS ANALYSIS. PHASE I WILL FOCUS ON SOLUTION-ADAPTIVE ALGORITHM DEVELOPMENT AND WILL UTILIZE STRESS-INTENSITY FACTOR CALCULATIONS FOR FATIGUE-LIFE PREDICTION. PHASE II WILL INCLUDE RESEARCH ANDDEVELOPMENT INTO CONSTITUTIVE THEORIES OF FRACTURE, ACCURATESTRESS RECOVERY PROCEDURES, ADAPTIVE REFINEMENT STRATEGIES, AND DEVELOPMENT AND DELIVERY OF A GENERAL THREE-DIMENSIONAL CODE.

Principal Investigator:


0

Business Contact:

Small Business Information at Submission:

Huntsville Sciences Corp
3315 Bob Wallace Ave #107 Huntsville, AL 35805

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