PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
Nanofiller-modified composites have enormous potential for advanced structural health monitoring (SHM) because they are self-sensing via their piezoresistive properties. However, the current state of the art is largely limited to static damage detection between two distinct states (i.e. comparison between pre-damage and post-damaged states). This is an important limitation because transient responses can provide great insight into damage events. It is therefore desirable to incorporate the transient effects into piezoresistive-based SHM. Unfortunately, the transient response of piezoresistive materials has not been widely investigated. To address this limitation, this study examines the piezoresistive response of a slender carbon nanofiber (CNF)-modified epoxy rod specimen due to impact loading as a function of time. More specifically, the change in voltage along the length of the rod is recorded as an idealized one-dimensional elastic plane wave traverses through the specimen. This allows us to directly compare the rate of voltage change in the CNF/epoxy to the speed of sound of the material. The fundamental insights into transient piezoresistivity herein uncovered has the potential to greatly facilitate future advances in piezoresistive-based SHM.
J. A. Hernandez andT. N. Tallman
"On the transient piezoresistive response of impacted nanofiber-modified epoxy", Proc. SPIE 10970, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2019, 1097013 (27 March 2019); https://doi.org/10.1117/12.2514259
ACCESS THE FULL ARTICLE
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The alert did not successfully save. Please try again later.
J. A. Hernandez, T. N. Tallman, "On the transient piezoresistive response of impacted nanofiber-modified epoxy," Proc. SPIE 10970, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2019, 1097013 (27 March 2019); https://doi.org/10.1117/12.2514259