Mixed-mode I/II fracture criteria for adhesively-bonded pultruded GFRP/steel joint

Published on Jan 1, 2021in Composite Structures5.138
· DOI :10.1016/J.COMPSTRUCT.2020.113012
Zhengwen Jiang2
Estimated H-index: 2
,
Zhi Fang11
Estimated H-index: 11
+ 2 AuthorsYawei Fang2
Estimated H-index: 2
Source
Abstract
Abstract The pure mode-I, pure mode-II and the mixed-mode I/II fracture behavior of the adhesively-bonded pultruded GFRP/steel joint were experimentally investigated by using double cantilever beam (DCB) test, and four-point end-notched flexure (4ENF) test combined with four-point single leg bending (4SLB) test, respectively. The extended global method (EGM) was employed to obtain closed-form analytical solutions of mode-II fracture toughness for the 4ENF specimen and mixed-mode I/II fracture toughness components for the 4SLB specimen. Combined with the mode-I fracture toughness obtained by the experimental compliance method (ECM), the power law criteria in initiation and propagation processes were developed for adhesively-bonded pultruded GFRP/steel joint. Validation on the developed mixed-mode fracture criteria was performed through employing it to predict the load-displacement responses of the 4SLB specimens combined with VCCT. Finally, the mixed-mode fracture criteria of the adhesively-bonded GFRP/steel joint were compared to those of the adhesively-bonded GFRP/GFRP joint for quantifying their difference.
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