Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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The Effect of the CFRP/GFRP Composite Thickness on AE Characteristics and Mixed Mode Crack Behavior

CFRP/GFRP 적층복합재의 두께가 혼합모드 균열거동과 AE에 미치는 영향

  • Yun, Yu-Seong (IBS Innovation Co., Ltd.) ;
  • Kim, Da-Jin-Sol (Department of Safety Engineering of Graduate School, Pukyong National University) ;
  • Kwon, Oh-Heon (Department of Safety Engineering, Pukyong National University)
  • Received : 2014.08.08
  • Accepted : 2014.10.10
  • Published : 2014.12.31
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Abstract

Recently many efforts and researches have been done to cope with industrial facilities that require a low energy machines due to the gradual depletion of the natural resources. The fiber-reinforced composite materials in general have good properties and have the proper mechanical properties according to the change of the ply sequences and fiber distribution types. However, in the fiber-reinforced composite material, there are several problems, including fiber breaking, peeling, layer lamination, fiber cracking that can not be seen from the metallic material. Particularly, the fracture and delamination are likely to be affected by the thickness of the stacking laminates when the bi-material laminated structure is subjected to a load of the mixed mode. In this study, we investigated the effect of the thickness ratio of the difference in the CFRP/GFRP bi-material laminate composites by measuring the cracking behavior and the AE characteristics in a mixed mode loading, which may be generated in the actual structure. The results show that the thickness of the CFRP becomes more thick, the mode I energy release rate becomes a larger, and also the influence of mode I is greater than that of mode II. In addition, AE amplitude which shows the level of the damage in the structure was obtained the more damage in the CFRP with the thin thickness.

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References

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