The Boeing Company

Everett A Westerman

Russell Lee Keller

Eugene Dan-Jumbo

Gary E Georgeson

Phillip E Roll

Marc Rollo Matsen

Kenneth Harlan Griess

David B Blackwell

Eugene A Dan-Jumbo

Russell L Keller

Arun Ayyagari

Joseph Lawrence Hafenrichter

Kevin Yong Ung

Craig Farris Battles

Rudy L Cologna

Karl Loren Johnson

Kenneth Porad

Gloria J Nickson

Mahesh G Seetharamu

Rajesh Doda

Philip E Roll

Allison N Deal

Mark S Cohodas

Scott Bridgford

Brian K Ramberg

Eugene A Dan-jumbo

A structural repair includes a tell-tale optical witness that allows the health of the repair to be visually monitored. The optical witness includes a stress sensitive fluorescent dye that shows changes in local strain/stress patterns when the repair is subjected to electromagnetic energy of a particular wavelength. The dyes fluoresce more or less strongly as a function of the local stress/strain.

Structural repair having optical witness and method of monitoring repair performance

A patch for a structure has a rework area with an inconsistency formed therein. The patch comprises a patch body having at least two regions including a fail-safe region and a safe-life region encompassing the fail-safe region. The safe-life region has a mode I interlaminar fracture toughness that is less than the mode I interlaminar fracture toughness of the fail-safe region.

Oblong configuration for bonded patch

A composite laminate patch for reworking an inconsistent area in a structure has inner and outer control regions possessing differing interlaminar fracture toughnesses for controlling the advance of a disbond in the patch. One or more separation zones in the patch between the control regions aids in diffusing the fracture energy of the disbond as the disbond advances from the inner region to the outer region.

Bonded patch having multiple zones of fracture toughness

A repair patch for reworking an inconsistent area of a composite structure includes a patch body adapted to cover the inconsistent area and having a first patch region, a second patch region outside the first patch region and a first separation zone between the first patch region and the second patch region, with the first patch region, the first separation zone and the second patch region having increasing interlaminar fracture toughness from a center to an edge of the patch body; and a layer of adhesive for bonding the patch body to the composite structure.

Discretely tailored multi-zone bondline for fail-safe structural repair

A method and apparatus for managing parts. A number of identifiers is received for an unidentified part. A determination is made as to whether the number of identifiers sufficiently matches a number of corresponding identifiers in a plurality of identifiers in a code stored in a database of codes associated with parts. The code is associated with the part. In response to the number of identifiers matching the number of corresponding identifiers in the plurality of identifiers in the code, a repository storing related information for the parts is accessed to obtain the related information for the part using a code identified for the part.

Interactive system for managing parts and information for parts

A patch for reworking an inconsistent area in a composite structure includes a composite laminate patch and a layer of adhesive for bonding the laminate patch to the composite structure. The laminate patch has at least first and second regions for releasing strain energy around the inconsistent area respectively at different rates.

Predictable bonded rework of composite structures using tailored patches

Method of configuring a patch body

A patch for reworking an inconsistent area in a composite structure includes a composite laminate patch adapted to cover the inconsistent area and bonded to the structure by a layer of adhesive. The patch includes a plurality of composite plies having a tapered cross section, and at least first and second regions respectively having differing fracture toughnesses.

Tapered patch for predictable bonded rework of composite structures

Method of reworking an area of a composite structure containing an inconsistency

A composite laminate patch for reworking an inconsistent area in a structure has inner and outer control regions possessing differing interlaminar fracture toughnesses for controlling the advance of a disbond in the patch. One or more separation zones in the patch between the control regions aids in diffusing the fracture energy of the disbond as the disband advances from the inner region to the outer region.

A patch for reworking an inconsistent area of a composite structure comprises a composite laminate patch and a bond joint between the patch and the structure. The bond joint including at least first and second regions respectively having differing properties for releasing strain energy around the inconsistent area at different rates.

Predictable bonded rework of composite structures

A thermal and vacuum assessment method includes providing a composite part having a repair area, installing a vacuum bag over the repair area, drawing a vacuum on the vacuum bag, testing for air leaks in the vacuum bag, heating the vacuum bag and obtaining a thermal image of the repair area.

Growing community of inventors

Auburn, WA, United States of America

Everett A Westerman