University of Washington

The Boeing Company

Purdue Research Foundation

Sei-Hum Jang

Alex Kwan-Yue Jen

Brian D Flinn

Gary E Georgeson

Kwan-Yue Jen

Zhengwei Shi

Bart Kahr

Ryan E Toivola

Sen Liu

Scott R Johnston

Baoquan Chen

Jingdong Luo

Larry Dalton

Wesley L Holman

Gregory Robert Gleason

Eric Winter

Jae-Wook Kang

Tucker Howie

Daniel S Elliott

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

Improved methods of detecting thermal exposure are provided herein. The provided methods utilize initially dormant luminescent probes incorporated into a matrix to form a composite. When exposed to heat over a period of time, the luminescent probes are 'activated' through a molecular transformation initiated by thermal energy. The activated probes exhibit a luminescent profile based on the extent of thermal exposure, thereby providing an indicator of the thermal exposure experienced by the matrix. When the composite is used to produce a structural component of a vehicle (e.g., an aircraft), the methods provide a convenient, large-area indicator of thermal damage experienced by the structural component.

Detection of thermal damage of composites using molecular probes

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

Electron acceptor compounds, nonlinear optical chromophores made from the electron acceptor compounds, methods for making the electron acceptor compounds and nonlinear optical chromophores, lattices that include the nonlinear optical chromophores, and devices that include the nonlinear optical chromophores.

Electron acceptors for nonlinear optical chromophores

Electron acceptor compounds, nonlinear optical chromophores, methods for making the compounds and chromophores, and materials and electro-optic devices that include the chromophores.

Pyrroline chromophores

Disclosed are solid state lasers and laser gain media which include lasing crystals having crystalline lattice incorporating lasable organic dye molecules in regular positions. The monolithic crystals are readily prepared and the organic dye can be varied across a broad range of available materials to vary the emission characteristics of the crystals.

Dye lasers and organic inclusions for same

Growing community of inventors

Mukilteo, WA, United States of America

Sei-Hum Jang