Effect of curved delamination front on mode-I fracture toughness of adhesively bonded joints

Published on Apr 1, 2015in Engineering Fracture Mechanics3.426
· DOI :10.1016/J.ENGFRACMECH.2015.03.020
Zhengwen Jiang4
Estimated H-index: 4
(SEU: Southeast University),
Shui Wan5
Estimated H-index: 5
(SEU: Southeast University)
+ 2 AuthorsKongjian Shen5
Estimated H-index: 5
(SEU: Southeast University)
Abstract The influence of curved delamination front on mode-I fracture toughness of adhesively-bonded composite joint is investigated using double cantilever beam (DCB) with an adhesive layer. The model of curved delamination front is converted to the model of straight crack front based on the principle of equivalent crack area. With visual deviation λ v and non-uniformity coefficient β , the effect of curved delamination front can be incorporated into determination of fracture toughness for DCB specimens. Then, the parametric analyses concerning λ v are studied with virtual crack closure technique (VCCT). Meanwhile, the practical formulas of λ v are put forward.
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