Sandwich panel disbond repair
AssigneeRohr, Inc.
InventorsAndrew L. Joslyn, John Oum, Samadi Yoeuth
Life of this patent
Estimating the term…
Abstract
A structural panel for an aircraft nacelle may comprise a first skin, a second skin, and a core sandwiched between them. A disbond may be present between the first skin and the core. A plurality of layers of blueprint film adhesive may be positioned over the disbond. The structural panel may be vacuum bagged, and the blueprint film adhesive may be heated. The blueprint film adhesive may flow through perforations in the first skin and bond the first skin to the core.
Claims18
A method of repairing a disbond in a structural sandwich panel comprising:
- positioning a film adhesive adjacent to the skin of the sandwich panel around a disbond between the skin and a core of the sandwich panel;
- coupling a first release film over the film adhesive;
- coupling a breather cloth over the film adhesive;
- enclosing the disbond in a vacuum bag;
- and
- applying heat to the film adhesive;
- positioning the sandwich panel such that an interior surface of the skin is facing away from a direction of gravity during the applying heat.
A repair method for a structural acoustic panel having a first skin, a second skin, and a cellular core bonded between the first skin and the second skin, with an area between the first skin and the cellular core defining a disbond, the method comprising,
- placing a film adhesive on an external surface of the first skin opposite an internal surface that is adjacent to the cellular core;
- heating the first skin and the film adhesive until the film adhesive liquefies adequately to flow;
- pushing the liquefied adhesive through the perforations formed through the first skin;
- wetting the internal surface of the first skin and walls of the cellular core with the liquefied adhesive;
- and
- curing the liquefied adhesive in place to form a bond between the first skin and the cellular core.
Dependencies are inferred from the claim text.