Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
- Publication
- File Type
Articles 1 - 3 of 3
Full-Text Articles in Engineering
A Time-Resolved Method For Nonlinear Ultrasonic Measurements, Stephen D. Holland, Wolfgang Sachse
A Time-Resolved Method For Nonlinear Ultrasonic Measurements, Stephen D. Holland, Wolfgang Sachse
Stephen D. Holland
We describe a time-resolved method for measuring nonlinear ultrasonic phenomena. Current approaches rely on a narrowband measurement of harmonic generation to identify and characterize nonlinearity. Concomitant with these techniques is poor time resolution. We address this limitation with a hybrid narrowband/broadband approach that provides simultaneous time resolution and harmonic isolation for the measurement of weak nonlinearites. We discuss applications and present demonstrative results showing harmonic generation both in water and at a dry contact aluminum-aluminum interface.
Ecocomposite Materials, David A. Bainbridge
Ecocomposite Materials, David A. Bainbridge
David A Bainbridge
Ecocomposite materials combine fibers, resins and natural materials for added strength and durability. These materials can be fully and easily recycled by nature.
Ecocomposite Materials, David A. Bainbridge
Ecocomposite Materials, David A. Bainbridge
David A Bainbridge
If we are wise we can make a transition to the Age of Ecocomposites with virtually no pollution. Ecocomposite materials are those made with natural fibers and resins and can be produced in sustainable agro-industrial ecosystems. These materials can reused, recycled or returned to nature by grinding, composting, biological breakdown, or benign solvents. Historical use and recent rediscovery of these materials has suggested the many advantages (and challenges) using these materials offer to designers and engineers.