Fan blade platform feature for improved blade-off performance

摘要

A fan blade for a gas turbine engine having an airfoil with a leading edge; a trailing edge; a concave side; and a convex side. The blade has an integral platform with: a convex fillet merging with the airfoil; a forward edge; an aft edge; and a thickness defined between a top surface and an underside surface. The platform includes a stiffener on the underside surface adjacent the convex side of the blade, such that the stiffener defines a blade-off event platform fracture path on a second side of the platform adjacent the following blade and adjacent the convex side of the airfoil.