Journal
MATERIALS & DESIGN
Volume 163, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2018.12.001
Keywords
Fatigue; Marine environment; Basalt fiber reinforced polymer; SEM
Categories
Funding
- National Key Research and Development Program of China [2017YFC0703000]
- National Natural Science Foundation of China (NSFC) [51878149]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) [CE02-2-44]
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This paper describes the degradation of the tension-tension fatigue behavior of basalt fiber-reinforced polymer (BFRP) composites after exposure to a salt solution. Two levels of stress ratio (R = 0.1 and 0.8) were applied to typical fatigue applications during the experiment. The stiffness degradation and S-N curves of the specimens for different durations of aging were recorded. The damage evolution and fracture surface of aged and non-aged specimens were also recorded during fatigue loading using in-situ scanning electron microscopy (SEM). The results show that the static strength of the BFRP shows negligible degradation after aging in the salt solution, whereas the detrimental effect of saltwater becomes apparent under fatigue loading. Fromthe SEMimages of fatigue damage for different aging times, it can be seen that the fiber/matrix interface region becomes a controlling factor in the fatigue behavior with early interface debonding occurring in the aged specimens. The interface deteriorates with respect to the aging time and lower stress ratio, which results in different fatigue lives and degradation properties of BFRP composites after saltwater corrosion. The fatigue life prediction indicates that the fatigue strength of BFRP degrades to an acceptable level after the occurrence of saltwater corrosion. (c) 2018 The Authors. Published by Elsevier Ltd.
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