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dc.contributor.authorDong, S.
dc.contributor.authorDong, X.
dc.contributor.authorAshour, Ashraf F.
dc.contributor.authorHan, B.
dc.contributor.authorOu, J.
dc.date.accessioned2019-06-11T11:19:20Z
dc.date.accessioned2019-06-17T11:03:53Z
dc.date.available2019-06-11T11:19:20Z
dc.date.available2019-06-17T11:03:53Z
dc.date.issued2019
dc.identifier.citationDong S, Dong X, Ashour A et al (2019) Fracture and self-sensing characteristics of super-fine stainless wire reinforced reactive powder concrete. Composites Part B: Engineering. Accepted for Publication.en_US
dc.identifier.urihttp://hdl.handle.net/10454/17126
dc.descriptionYesen_US
dc.description.abstractSuper-fine stainless wire (SSW) can not only form widely distributed enhancing, toughening and conductive network in reactive powder concrete (RPC) at low dosage level, but also improve weak interface area and refine cracks due to its micron scale diameter and large specific surface. In addition, the crack resistance zone generated by SSWs and RPC matrix together has potential to further enhance the fracture properties of composites. Therefore, fracture and self-sensing characteristics of SSW reinforced RPC composites were investigated in this paper. Experimental results indicated that adding 1.5 vol. % of SSW leads to 183.1% increase in the initial cracking load of RPC specimens under three-point bending load. Based on two parameter fracture model calculations, an increase of 203.4% in fracture toughness as well as an increase of 113.3% in crack tip opening displacement of the composites reinforced with 1.5% SSWs are achieved. According to double-K fracture model calculations, the initiation fracture toughness and unstable fracture toughness of the composites are enhanced by 185.2% and 179.2%, respectively. The increment for fracture energy of the composites reaches up to 1017.1% because of the emergence of blunt and tortuous cracks. The mixed mode Ⅰ-Ⅱ fracture toughness of the composites is increased by 177.1% under four-point shearing load. The initial angle of mixed mode Ⅰ-Ⅱ cracks of the composites decreases with the increase of SSW content. The initiation and propagation of cracks in the composites can be monitored by their change in electrical resistivity. The excellent fracture toughness of the composites is of great significance for the improvement of structure safety in serviceability limit states, and the self-sensing ability of the composites can also provide early warning for the degradation of structure safety.en_US
dc.description.sponsorshipNational Key Research and Development Program of China (2018YFC0705601), the National Science Foundation of China (51578110), China Postdoctoral Science Fundation (2019M651116) and the Fundamental Research Funds for the Central Universities in China (DUT18GJ203).en_US
dc.language.isoenen_US
dc.subjectSuper-fine stainless wireen_US
dc.subjectReactive powder concreteen_US
dc.subjectFracture toughnessen_US
dc.subjectFracture energyen_US
dc.subjectFracture self-sensingen_US
dc.titleFracture and self-sensing characteristics of super-fine stainless wire reinforced reactive powder concreteen_US
dc.status.refereedYesen_US
dc.typeArticleen_US
dc.type.versionAccepted manuscripten_US
dc.description.publicnotesThe full-text of this article will be released for public view at the end of the publisher embargo - 12 months after publication.en_US
dc.date.updated2019-06-11T10:19:33Z
refterms.dateFOA2019-06-17T11:05:27Z


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