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THERMO-CHEMICAL-STRUCTURAL ANALYSIS OF CARBON-PHENOLICS WITHPORE PRESSURE AND…

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
16896
Program Year/Program:
1991 / SBIR
Agency Tracking Number:
16896
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Pda Engineering
2975 Redhill Avenue Costa Mesa, CA 92626
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1991
Title: THERMO-CHEMICAL-STRUCTURAL ANALYSIS OF CARBON-PHENOLICS WITHPORE PRESSURE AND PYROLYSIS EFFECTS
Agency: NASA
Contract: N/A
Award Amount: $50,000.00
 

Abstract:

CARBON-PHENOLIC (C/PH) COMPOSITES HAVE BEEN WIDELY USED IN SOLID ROCKET MOTORS DESPITE THE FACT THAT THEIR HIGH-TEMPERATURE, THERMOSTRUCTURAL BEHAVIOR IS NOT WELL UNDERSTOOD. MANY OF THE FAILURE MODES (E.G., WEDGE-OUT, PLY-LIFT, DELAMINATION, POCKETING) COMMONLY SEEN IN THE C/PHCOMPONENTS OF FIRED SRM NOZZLES CAN ONLY BE EXPLAINED AS PORE-PRESSURE-INDUCED PHENOMENA THAT OCCUR DURING PYROLYSIS. YET, CURRENT THERMOSTRUCTURAL ANALYSIS METHODS ARE INCAPABLE OF ACCURATELY PREDICTING THE HIGH HEATING RATE BEHAVIOR OF SIMPLE C/PH TEST SPECIMENS, LET ALONE ACCURATELY CHARACTERIZING THE PORE PRESSURE AND PYROLYSIS BEHAVIOR OF AN ACTUAL MOTOR NOZZLE. THIS PROJECT ADDRESSES THE PROBLEM OF ACCURATELY CHARACTERIZING THE THERMOSTRUCTURAL BEHAVIOR OF C/PH SUBJECTED TO A HIGH-TEMPERATURE AND HEATING-RATE ENVIRONMENT AS TYPICALLY FOUND IN A SOLID ROCKET MOTOR. THIS WILL BE ACCOMPLISHED BYUSING A VOLUME-BASED CONTINUITY MODEL TO COUPLE THE THERMO-CHEMICAL TO THE THERMOSTRUCTURAL ANALYSIS. THIS UNIQUE APPROACH MODELS THE PORE-PRESSURE DEVELOPMENT DURING PYROLYSIS MORE ACCURATELY THAN CURRENT ANALYTICAL METHODS SINCE IT COUPLES THE PORE-PRESSURE LEVEL DIRECTLY TO THE STRUCTURAL DEFORMATIONS. CARBON-PHENOLIC (C/PH) COMPOSITES HAVE BEEN WIDELY USED IN SOLID ROCKET MOTORS DESPITE THE FACT THAT THEIR HIGH-TEMPERATURE, THERMOSTRUCTURAL BEHAVIOR IS NOT WELL UNDERSTOOD. MANY OF THE FAILURE MODES (E.G., WEDGE-OUT, PLY-LIFT, DELAMINATION, POCKETING) COMMONLY SEEN IN THE C/PHCOMPONENTS OF FIRED SRM NOZZLES CAN ONLY BE EXPLAINED AS PORE-PRESSURE-INDUCED PHENOMENA THAT OCCUR DURING PYROLYSIS. YET, CURRENT THERMOSTRUCTURAL ANALYSIS METHODS ARE INCAPABLE OF ACCURATELY PREDICTING THE HIGH HEATING RATE BEHAVIOR OF SIMPLE C/PH TEST SPECIMENS, LET ALONE ACCURATELY CHARACTERIZING THE PORE PRESSURE AND PYROLYSIS BEHAVIOR OF AN ACTUAL MOTOR NOZZLE. THIS PROJECT ADDRESSES THE PROBLEM OF ACCURATELY CHARACTERIZING THE THERMOSTRUCTURAL BEHAVIOR OF C/PH SUBJECTED TO A HIGH-TEMPERATURE AND HEATING-RATE ENVIRONMENT AS TYPICALLY FOUND IN A SOLID ROCKET MOTOR. THIS WILL BE ACCOMPLISHED BYUSING A VOLUME-BASED CONTINUITY MODEL TO COUPLE THE THERMO-CHEMICAL TO THE THERMOSTRUCTURAL ANALYSIS. THIS UNIQUE APPROACH MODELS THE PORE-PRESSURE DEVELOPMENT DURING PYROLYSIS MORE ACCURATELY THAN CURRENT ANALYTICAL METHODS SINCE IT COUPLES THE PORE-PRESSURE LEVEL DIRECTLY TO THE STRUCTURAL DEFORMATIONS.

Principal Investigator:


0

Business Contact:

Small Business Information at Submission:

Pda Engineering
2975 Redhill Ave Costa Mesa, CA 92626

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