US 12,275,204 B2
Composite components and multi-zone fiber preforms for composite components
Venkateshwar R. Aitharaju, Troy, MI (US); Selina Xinyue Zhao, Rochester Hills, MI (US); George Han, Marion, NC (US); and Colin Rowbottom, Marion, NC (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US); and COATS AMERICAN INC, Marion, NC (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US); and Coats American Inc, Marion, NC (US)
Filed on May 23, 2023, as Appl. No. 18/322,178.
Prior Publication US 2024/0391187 A1, Nov. 28, 2024
Int. Cl. B29C 70/54 (2006.01); B29C 70/46 (2006.01)
CPC B29C 70/543 (2013.01) [B29C 70/46 (2013.01); Y10T 428/24033 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A method for fabricating a composite panel comprising:
stitching a plurality of first continuous reinforcing fibers in N first zones and M second zones of a backing substrate of a preform, where N and M are integers greater than zero,
wherein the N first zones are arranged near C corners of the composite panel, where C is an integer, and
wherein the plurality of first continuous reinforcing fibers in the N first zones is arranged radially relative to the C corners, and
wherein at least one of:
a fiber density of the plurality of first continuous reinforcing fibers in the N first zones that is less than a fiber density of the plurality of first continuous reinforcing fibers in the M second zones, and
a stitch density of the plurality of first continuous reinforcing fibers in the N first zones that is less than a stitch density of the plurality of first continuous reinforcing fibers in the M second zones.