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Quantifying voids effecting delamination in carbon/epoxy composites: static and fatigue fracture behavior

 
: Hakim, I.; May, D.; Ras, M.; Meyendorf, Norbert; Donaldson, Steven L.

:

Meyendorf, N.G. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Smart Materials and Nondestructive Evaluation for Energy Systems 2016 : 21-23 March 2016, Las Vegas, Nevada, United States
Bellingham, WA: SPIE, 2016 (SPIE Proceedings 9806)
ISBN: 978-1-5106-0047-8
Art. 98060H
Conference "Smart Materials and Nondestructive Evaluation for Energy Systems" <2, 2016, Las Vegas/Nev.>
Englisch
Konferenzbeitrag
Fraunhofer IKTS ()
voids; carbon fiber composite; thermography; interlaminar fracture toughness

Abstract
On the present work, samples of carbon fiber/epoxy composites with different void levels were fabricated using hand layup vacuum bagging process by varying the pressure. Thermal nondestructive methods: thermal conductivity measurement, pulse thermography, pulse phase thermography and lock-in-thermography, and mechanical testing: modes I and II interlaminar fracture toughness were conducted. Comparing the parameters resulted from the thermal nondestructive testing revealed that voids lead to reductions in thermal properties in all directions of composites. The results of mode I and mode II interlaminar fracture toughness showed that voids lead to reductions in interlaminar fracture toughness. The parameters resulted from thermal nondestructive testing were correlated to the results of mode I and mode II interlaminar fracture toughness and voids were quantified.

: http://publica.fraunhofer.de/dokumente/N-414791.html