US 11,806,948 B2
Method of forming flyaway stringer end caps
Mary LeAnn Parker, Snohomish, WA (US); Khanh Mai Pham, Renton, WA (US); Lisa Christina Carlson, Auburn, WA (US); and Garrett Charles Hanson, Everett, WA (US)
Assigned to The Boeing Company, Chicago, IL (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Dec. 12, 2019, as Appl. No. 16/712,089.
Prior Publication US 2021/0178708 A1, Jun. 17, 2021
Int. Cl. B29C 70/44 (2006.01); B64C 3/18 (2006.01); B33Y 80/00 (2015.01); B29L 31/30 (2006.01)
CPC B29C 70/446 (2013.01) [B64C 3/182 (2013.01); B29L 2031/3076 (2013.01); B33Y 80/00 (2014.12)] 35 Claims
OG exemplary drawing
 
1. A method of forming a stringer, the method comprising:
laying up a stringer preform comprising fiber-reinforced material;
placing the stringer preform onto a skin panel preform;
bonding an end cap to the stringer preform and the skin panel preform; and
co-curing the stringer preform and the skin panel preform while the end cap is bonded to the stringer preform and the skin panel preform, resulting in a composite part that includes the end cap;
wherein the end cap is bonded to an outboard end of the stringer preform and fastened to a wing panel.