Patent ID: 11898399
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC B  E | IPC E

Claim 0:
1. A composite stiffener comprising:
a set of strengthening strips, each strengthening strip comprising an anti-warp composite material;
a set of inner laminated layers; and
a core having-torsion-box grid structure comprising a torsion box grid structure where voids are filled with foam with lengths of the voids extending along a length of the core, wherein at least one inner laminated layer of the set of inner laminated layers is bonded to at least one side of a a plurality of sides of the core, and each set of strengthening strips is bonded to an outer side of each of the inner laminated layers, and a thickness of the core is the same as a thickness of an adjacent core material in a structure in which the composite stiffener is inserted into.