Composite airfoil metal patch

A composite airfoil assembly comprising:

• a composite airfoil including a leading edge and a trailing edge;
• a pressure side and a suction side extending between said leading edge and said trailing edge;
• a tip at a radial outer end of said airfoil;
• a shank at a radial inner end of said airfoil;
• and
• a dovetail connected to said shank;
• a disk having a plurality of dovetail slots, each formed and defined by first and second posts having reverse dovetails, the first and second posts and reverse dovetails capturing the dovetail of the airfoil to retain the airfoil during operation;
• and
• a metal patch bonded to a pressure pad of said dovetail and extending between a root end of a root of said dovetail and said shank, and said metal patch extending inwardly over and no further than a root pressure face of said root;
• a shim disposed between said dovetail and disk;
• and
• a wear strip disposed between the shim and the patch;
• such that the metal patch, wear strip, and shim form a 3-layer structure between the dovetail and disk and relative motion is permitted between the wear strip and shim.