TY - JOUR
T1 - R-curve behavior of adhesively bonded composite joints with highly toughened epoxy adhesive under mixed mode conditions
AU - Kouno, Yousuke
AU - Imanaka, Makoto
AU - Hino, Ryutaro
AU - Omiya, Masaki
AU - Yoshida, Fusahito
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/3
Y1 - 2021/3
N2 - The fracture toughness of an adhesively bonded carbon fiber reinforced plastic joint under mixed mode (I and II) conditions was determined by means of the Fernlund–Spelt type double cantilever beam (DCB) test, where a rubber-modified epoxy adhesive was used. The R curves were determined by calculating the energy release rates, GI and GII, based on the beam theory, along with a finite element analysis. The total energy release rate GT (= GI + GII) strongly depended on the I–II mixed mode. This means that it remarkably increased with increasing mode-II component; furthermore, it varied with crack growth from GTC (at the onset of cracking) to GTS (at the steady crack-propagation region). The difference between GTC and GTS increased with the increase in the mode II component. Such R-curve characteristics were discussed based on observation of the fracture surfaces with a scanning electron microscope and the corresponding crack propagation-path behavior.
AB - The fracture toughness of an adhesively bonded carbon fiber reinforced plastic joint under mixed mode (I and II) conditions was determined by means of the Fernlund–Spelt type double cantilever beam (DCB) test, where a rubber-modified epoxy adhesive was used. The R curves were determined by calculating the energy release rates, GI and GII, based on the beam theory, along with a finite element analysis. The total energy release rate GT (= GI + GII) strongly depended on the I–II mixed mode. This means that it remarkably increased with increasing mode-II component; furthermore, it varied with crack growth from GTC (at the onset of cracking) to GTS (at the steady crack-propagation region). The difference between GTC and GTS increased with the increase in the mode II component. Such R-curve characteristics were discussed based on observation of the fracture surfaces with a scanning electron microscope and the corresponding crack propagation-path behavior.
KW - Adhesively bonded CFRP joint
KW - Mixed-mode fracture
KW - R-curve
KW - Toughened epoxy adhesive
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U2 - 10.1016/j.ijadhadh.2020.102762
DO - 10.1016/j.ijadhadh.2020.102762
M3 - Article
AN - SCOPUS:85096367028
SN - 0143-7496
VL - 105
JO - International Journal of Adhesion and Adhesives
JF - International Journal of Adhesion and Adhesives
M1 - 102762
ER -