The Boeing Company

Ryan E Toivola

Gary E Georgeson

Sei-Hum Jang

Alex Kwan-Yue Jen

Brian D Flinn

Scott R Johnston

Wesley L Holman

Gregory Robert Gleason

Zhengwei Shi

Eric Winter

There is provided a removable chromatic witness assembly, system, and method to monitor thermal events and impact events on a surface of a composite structure. The removable chromatic witness assembly has a plurality of chromatic witness geometric configurations separately coupled in an arrangement to one or more portions of a polymeric film layer. Each chromatic witness geometric configuration has a plurality of chromatic probes of a same type incorporated into an adhesive material. At least two of the geometric configurations have a different type of chromatic probes with a different sensing capability for thermal events and impact events on the composite structure. The polymeric film layer and the geometric configurations form the removable chromatic witness assembly in a form of a removable chromatic witness applique configured to be removably applied directly and continuously to the surface of the composite structure, and configured to monitor the thermal and impact events.

Removable chromatic witness assembly, system, and method to monitor thermal events and impact events on a composite structure

A coating system includes at least one polymeric coating layer comprising at least one fluorescent dye, wherein an optical behavior of the fluorescent dye changes as a function of a stress of the at least one polymeric coating.

Method of detecting inconsistencies in composite structures and stress sensitive coatings used therein

Growing community of inventors

Kirkland, WA, United States of America

Ryan E Toivola