UNDER RAPID THERMAL LOADING

Award Information
Agency:
Department of Defense
Amount:
$49,917.00
Program:
SBIR
Contract:
N/A
Solitcitation Year:
N/A
Solicitation Number:
N/A
Branch:
Air Force
Award Year:
1986
Phase:
Phase I
Agency Tracking Number:
3682
Solicitation Topic Code:
N/A
Small Business Information
Aptech Engineering Services In
795 San Antonio Rd, Palo Alto, CA, 94303
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
N/A
Principal Investigator
 RUSSELL C CIPOLLA
 (415) 858-2863
Business Contact
Phone: () -
Research Institution
N/A
Abstract
FRACTURE MECHANICS LIFE PREDICTIONS REQUIRE THE DETERMINATION OF CRACK TIP STRESS INTENSITY FACTORS FOR USE IN STRUCTURAL RELIABILITY ASSESSMENTS. STRESSES IN METALLIC COMPONENTS RESULTING FROM RAPID THERMAL PULSING CAN BE HIGHLY COMPLEX AND SEVERE STRESS GRADIENTS OF A TENSILE AND COMPRESSIVE NATURE WILL OCCUR. IT IS PROPOSED HEREIN THAT A WEIGHT OR INFLUENCE FUNCTION METHOD BE DEVELOPED BECAUSE OF ITS EFFICIENCY TO SOLVE SUCH PROBLEMS. THE USE OF INFLUENCE FUNCTIONS WILL AVOID THE UNNECESSARY DISSIPATION OF RESOURCES WHEN REPETITIVE STRESS INTENSITY FACTOR CALCULATIONS ARE REQUIRED, SUCH AS IN FATIGUE CRACK GROWTH ANALYSES OR IN MONTE CARLO SIMULATIONS. A MAJOR BENEFIT OF THIS PROJECT WILL BE A COMPUTER PROGRAM THAT WILL EXECUTE ON A DESKTOP MICROCOMPUTER SO THAT THE TECHNIQUE CAN BE EASILY USED BY ENGINEERS.

* information listed above is at the time of submission.

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