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[학술저널]

  • 학술저널

Oh-Heon Kwon(Pukyong National University) Yu-Seong Yun(IBS Innovation) Yeong-Rok Ryu(Pukyong National University)

UCI(KEPA) : I410-ECN-0101-2016-550-001004146

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초록

In this study, a laminated composite material with dispersing aluminum oxide powder between the CFRP laminate plies, and also CFRP composites without aluminium oxide powder were fabricated for Mode Ⅰ experiments using the DCB specimen and a tensile test. The behavior of the crack and the change of the interfacial fracture toughness were evaluated. Also in order to evaluate the damage mechanism for the crack extension, the AE sensor on the surface of the DCB test specimen was attached. AE amplitude was estimated for CFRP-alumina and CFRP composite. And the fracture toughness was evaluated by the stress intensity factor and energy release rate. The results showed that an unstable crack was propagated rapidly in CFRP composite specimen along with the interface, but crack propagation in CFRP-alumina specimen was relatively stable. From results, we show that aluminium oxide powder spreaded uniformly in the interface of the CFRP laminate carried out the role for preventing the sudden crack growth.

목차

Abstract
1. Introduction
2. Experimental materials and method
3. Results and discussion
4. Conclusions
References

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