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Findings on Composite Materials Reported by Investigators at Institute for Advanced Studies (Fracture toughness and failure mechanism of graphene...

July 8, 2014

Findings on Composite Materials Reported by Investigators at Institute for Advanced Studies (Fracture toughness and failure mechanism of graphene based epoxy composites)

By a News Reporter-Staff News Editor at Journal of Technology -- Current study results on Composite Materials have been published. According to news reporting originating in Freiburg, Germany, by VerticalNews journalists, research stated, "The present study investigates the effect of addition of three different types on carbon nano-fillers on fracture toughness (K-IC) and failure mechanism of epoxy based polymer nano-composites. The carbon nano-fillers were dispersed in the epoxy matrix using a three-roll mill and the three nano-fillers used for this experiment were (i) thermally reduced graphene oxide (TRGO); (ii) graphite nano-platelets (GNP); and (iii) multi-wall carbon nano-tubes (MWCNT)."

The news reporters obtained a quote from the research from Institute for Advanced Studies, "The fracture toughness was measured as a function of weight percentage of the filler using single edge notch three-point-bending tests. The toughening effect of TRGO was most significant resulting in 40% increase in K-IC for 0.5 wt% of filler. On the other hand, the enhancements in toughness were 25% for GNP/epoxy and 8% for MWCNT/epoxy. Investigations on fracture surface revealed that crack pinning or bi-furcation by TRGO and crack face separation initiated from TRGO contributed to enhance the fracture toughness."

According to the news reporters, the research concluded: "Based on the observations, a schematic explaining the crack propagation in graphene/epoxy composite and the interaction of crack front with graphene particles was proposed."

For more information on this research see: Fracture toughness and failure mechanism of graphene based epoxy composites. Composites Science and Technology, 2014;97():90-99. Composites Science and Technology can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier -; Composites Science and Technology -

Our news correspondents report that additional information may be obtained by contacting S. Chandrasekaran, Freiburg Inst Adv Studies FRIAS, D-79104 Freiburg, Germany. Additional authors for this research include N. Sato, F. Tolle, R. Mulhaupt, B. Fiedler and K. Schulte.

Keywords for this news article include: Europe, Germany, Freiburg, Composite Materials

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Source: Journal of Technology

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