Patent ID: 9713901
Date: 2017-07-25
CPC Classifications: B29C,B29K,B29L

Claim:
1. A method of reducing cure shrinkage residual stress in a composite assembly, comprising: assembling a first composite part to a second composite part to form a detail assembly, the first and second composite part each having a flange and a web connected by a bend radius, the web of the first and second composite part being back-to-back; curing the detail assembly on a compensated cure tool compensated for cure shrinkage spring-in predicted to occur in the first and second composite part, the cure tool being non-compensated for thermally-induced spring-in predicted to occur in the first and second composite part during curing; allowing the first and second composite part of the detail assembly to spring in from the cure shrinkage; assembling the cured detail assembly to a third composite part that is uncured, the third composite interconnecting the flange of the first and second composite part; co-bonding the detail assembly to the third composite part to form a composite assembly having reduced cure shrinkage residual stress in the bend radii of the first and second composite part; and the compensated cure tool configured such that: