Patent ID: 8815132
Filing Date: 2014-08-26
Classification: B29C,Y10T

Abstract:
1. A method of configuring a patch body for bonding to a structure, the method comprising the steps of: dividing the patch body into at least two regions including a fail-safe region and a safe-life region encompassing the fail-safe region, each one of the regions being comprised of patch plies formed of composite material; selecting a composite material for the fail-safe region and selecting a different composite material for the safe-life region, the composite material selected for the fail-safe region having a higher mode I interlaminar fracture toughness than the composite material selected for the safe-life region, the mode I interlaminar fracture toughness of each region being a function of the composition of the composite material used in each region; forming patch plies of the safe-life region and the fail-safe region.