Engineering topics
Publications and source records attributed to Deaton, J. W..
NASA technical memorandum reports on research in damage and repair of composite-material structures of types used in airplane. Research includes: Identifying defect areas, determining whether particular kind of damage weakens structure in manner that degrades performance in intended application, developing repair procedures, and testing to demonstrate given repair procedure enables component to serve during remainder of its design life.
It is pointed out that graphite/polyimide (Gr/PI) composites are potential candidates for primary and secondary structural components in the next generation of reusable space vehicles and supersonic aircraft which are to possess operational capabilities involving the temperature range from 400 to 600 F. In connection with the considered applications, it is necessary to establish economic and reliable methods for the repair of Gr/PI composite components which have been damaged. The present investigation is concerned with the results of research conducted to develop a bonding process applicable to the repair of large areas in Gr/PI composite structural components. Attention is given to five repair techniques for Gr/PI composite materials. The techniques were employed to fabricate large panels from which flexure and short-beam-shear specimens were machined.
Repair techniques for graphite/epoxy and graphite/polyimide composite structures are discussed. Tension and compression test results for several basic repair processes that were applied to damaged specimens are shown to approach the strength of undamaged specimens. Other repair configurations currently under investigation are illustrated, and plans in the repair technology program are presented.
Parachutes lightweight coated fabrics air permeability under axial tensile loading and load cycling at room temperatures
Air permeability of lightweight fluorcarbon rubber-coated high temperature Nylon fabric under uniaxial tensile loads at room temperature
Axial slit effects on residual tensile strengths of polyethylene terephthalate film and fabric cylindrical shells
Stiffness properties of foam filled and air inflated fabric structures
Structural behavior and compressive strength of circular cylinders with longitudinal stiffening