Core Programs of High-Performance Composite Materials

摘要: Abstract : Evaluation of composites continued from the previous contract. New modifications, thermo-oxidative stability, and hygrothermal aging AFR700 were studied. E-beam curing was investigated. Bridge rehabilitation using carbon-epoxy demonstrated. Modeling damage in carbon-carbon fabric-based expanded to include 3-D stresses model testing. Double lap-shear adhesives testing successfully compared predicted actual test damage. Damage around a hole composite tension SVELT model; more detail by than FE. The CTE cracking behavior spacecraft cyanate ester measured. Processing changes identified implemented composites. Neural network software has improved processing science; it is accurate predictor resin cure analytical models. Hardware acquired allow expert control carbonization process. sensors for investigated included FTIR off-gas GC/MS. XRD studies VGCF measured degree graphitization other phases. A thermal conductivity instrument assembled sintering matrix single-stage pitch completed. Several new ways stabilizing investigated; polymerizable additives are most promising. high-char yield as resin.