Disbond resistant composite stiffener runout
US8974886B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2012 |
| Grant date | Mar 10, 2015 |
| Priority date | — |
| Expiry date | Mar 12, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24182
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The disclosure herein provides for disbond resistant stringer runouts. Various aspects may be used independently or in combination to mitigate disbonding associated with the stiffener runout under operational loads. Aspects include a stiffener runout having rounded base flange corners. A recessed notch may be incorporated within the base flange to provide a flange termination point that is forward of the web termination point, allowing the web to terminate prior to the base flange. The web may be trimmed from a full height to a reduced height at the web termination point. The base flange may be co-bonded to the underlying composite structure via a scarf joint. Perimeter clamp radius fillers may be used to concentrate a clamping force around the perimeter of the base flange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.