INNOVATIVE APPROACHES COMPATIBLE WITH WET LAMINATING PROCESSES SUCH AS FILAMENT WINDING ARE SOUGHT WHICH WILL ELIMINATE OR REDUCE FORMATION OF VOIDS DUE TO ENTRAPPED AIR.

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$49,950.00
Award Year:
1985
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
2352
Agency Tracking Number:
2352
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Po Box 389 - 964 E Swedesford, Exton, PA, 19341
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
GEORGE R MOULDER
(215) 647-7715
Business Contact:
() -
Research Institute:
n/a
Abstract
INNOVATIVE APPROACHES COMPATIBLE WITH WET LAMINATING PROCESSES SUCH AS FILAMENT WINDING ARE SOUGHT WHICH WILL ELIMINATE OR REDUCE FORMATION OF VOIDS DUE TO ENTRAPPED AIR. THE PROBLEM HAS BEEN THAT IN ADDITION TO AIR BUBBLES CONTAINED IN THE EPOXY ITSELF, AIR BUBBLES ARE ALSO TRAPPED BETWEEN RESIN AND THE FIBER DURING THE WETTING PROCESS. UPON CURING, VOIDS ARE CREATED WHICH REDUCE THE PERFORMANCE OF THE COMPOSITE. ALTHOUGH NON-DESTRUCTIVE EVALUATION TECHNIQUES ARE AVAILABLE TO SPOT THE VOIDS AND HELP TO DETERMINE THEIR SIGNIFICANCE, A PRODUCT FREE OF VOIDS AND POROSITIES IS DESIRED. THE APPLICATION OF ULTRASONIC ENERGY TO THIXOTROPIC AND VISCOUS MATERIALS HAS CONSISTENTLY DEMONSTRATED FLOW PROMOTION EFFECTS. ADDITIONALLY, ULTRASONIC ACTIVATION CAN IMPORVE OR CAUSE FLOW AT SIGNIFICANT LOWER TEMPERATURES THAT WOULD BE REQUIRED WITHOUT ULTRASONICS. AS DEMONSTRATED BY OUR EARLIER WORK, APPLICATION OF ULTRASONICS DURING RESIN PREPARATION, PREPREG PREPARATION AND COMPOSITE LAY-UP AND CURE CAN PROVIDE UNIFORM RESIN FLOW AND WETTING. THE OBJECTIVE OF THIS PHASE I EFFORT IS TO DEMONSTRATE THE TECHNICAL FEASIBILITY OF UTILIZING ULTRASONIC REACTION ENHANCEMENT TO CAUSE 100% "WET-OUT" OF RESIN MATRIX COMPOSITES. THE TOTAL IMPREGNATION OF THE FIBERS WOULD ELIMINATE TRAPPED AIR THUS ELIMINATING VOIDS AND POROSITIES. THIS TECHNICAL FEASIBILITY DEMONSTRATION WILL PROVIDE THE ENGINEERING DATA NECESSARY FOR FURTHER PHASE II AND III DEVELOPMENT OF PRODUCTION ARRAYS.

* information listed above is at the time of submission.

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