RESIDUAL-STRESS DEVELOPMENT IN NEAT POLY(ETHERETHERKETONE)

Material property models for poly(etheretherketone) (PEEK) have been c ombined with a residual stress model to provide a means for investigat ing the effect of crystallization process on the residual stress devel opment in semicrystalline materials. The analysis shows that crystalli zation causes an increase in the residual stress levels. This increase is affected through an increase in the resin modulus values and throu gh the resin modulus build-up at higher temperatures. The shrinkage du e to crystallization was found to have no effect on the residual stres s development in neat PEEK.