S Schultz et al 2009 Smart Mater. Struct. 18 115015 doi:10.1088/0964-1726/18/11/115015
S Schultz1, W Kunzler1, Z Zhu1, M Wirthlin1, R Selfridge1, A Propst2, M Zikry2 and K Peters2
Show affiliationsThis paper presents a new means for collecting fiber Bragg grating (FBG) data during drop-tower measurements used to assess damage to composite structures. The high repetition-rate collection process reveals transient features that cannot be resolved in quasi-static measurements. The experiments made at a repetition rate of about 500 Hz show that the detected FBG spectrum broadens for a short period of time and relaxes quickly to a narrower static state. Furthermore, this relaxation time increases dramatically as the strike count increases. The information gained by such measurements will enhance the ability to characterize and distinguish failure modes and predict the remaining lifetime in composite laminate structures.
Instrumentation and measurement
Issue 11 (November 2009)
Received 24 February 2009, in final form 25 July 2009
Published 15 September 2009
S Schultz et al 2009 Smart Mater. Struct. 18 115015
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