Fragile airfoil

An airfoil includes a plurality of composite plies extending from a leading edge to a trailing edge and between a tip and a root. The airfoil further includes a frangible airfoil portion at the tip, the frangible airfoil portion extending between the leading edge and the trailing edge and along a span between the tip and the frangible line, including a first plurality of composite plies. The frangible airfoil portion includes a first plurality of composite plies including fibers having a first fiber modulus. The airfoil further includes a residual airfoil portion extending along a span from the frangible line to the root, including a second plurality of composite plies. The second plurality of composite plies includes one or more plies having a second fiber modulus. The second fiber modulus is greater than the first fiber modulus. Further, the residual airfoil portion encounters the frangible airfoil portion at the frangible line. 一种翼型件，包括从前缘延伸到后缘并且在尖端和根部之间的多个复合层片。翼型件进一步在尖端处包括易碎翼型件部分，易碎翼型件部分在前缘和后缘之间延伸，并且在尖端和易