Dynamic Evaluation of Experimental Integral Fuel-Tank Sealants. Part II
Final technical rept. Jul 1977-Jun 1978
SYSTEMS RESEARCH LABS INC DAYTON OH RESEARCH APPLICATIONS DIV
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An exploratory development program has been performed to investigate and evaluate experimental integral fuel-tank sealant materials under laboratory conditions which closely simulate those of actual aircraft integral fuel tanks during flight. As part of this effort, a unique facility has been designed and fabricated for the evaluation of a variety of joint configurations. The facility consists primarily of a biaxial stress machine in which temperature, pressure, and vibrational strain can be programmed for automatic operation. Specimens can be strained longitudinally and torsionally to simulate actual flight conditions. Frequency and amplitude of the strains can be independently set and recorded. Simulated fuel-tank and environmental pressure can also be adjusted independently. Early difficulties with sealant-failure detection and with undesirable thermal strains have been largely resolved and partial evaluation of continuous-fillet specimens utilizing one sealant material has been performed. A second evaluation apparatus is now under construction.
- Adhesives, Seals and Binders