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Articles

Experimental characterization of dynamic crack growth behavior in CFRP adhesive interface

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Pages 397-411 | Received 11 Apr 2017, Accepted 02 Nov 2017, Published online: 23 Nov 2017
 

Abstract

The dynamic crack growth behavior of adhesively bonded joints under mode I and mixed mode (I + II) loading were investigated. The split Hopkinson pressure bar (SHPB) apparatus and the digital image correlation (DIC) technique were employed to determine the mode I fracture toughness of the adhesively bonded joints during crack propagation under impact loading. The dynamic crack growth behavior for carbon fiber reinforced plastics (CFRP) adhesively bonded joints under mode I loading was studied using this method. In order to verify the proposed method, the dynamic crack growth behavior of titanium alloy adhesively bonded joints was also studied. Moreover, the crack growth behavior of CFRP adhesively bonded joints under mixed mode loading was studied using the SHPB technique. For the considered CFRP adhesively bonded joints, the fracture toughness decreased under both mode I and mixed mode loading as the loading rate increased. Microscope observation showed that a shift in the crack location occurred in the high loading tests.

Acknowledgments

The authors would like to thank Hafizzy bin Yusop from Graduate School of Ritsumeikan University for assistance with the experiments and SEM observations.

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