title: Comparing monofractal and multifractal analysis of corrosion damage evolution in reinforcing bars.
abstract: Based on fractal theory and damage mechanics, the aim of this paper is to describe the monofractal and multifractal characteristics of corrosion morphology and develop a new approach to characterize the nonuniform corrosion degree of reinforcing bars. The relationship between fractal parameters and tensile strength of reinforcing bars are discussed. The results showed that corrosion mass loss ratio of a bar cannot accurately reflect the damage degree of the bar. The corrosion morphology of reinforcing bars exhibits both monofractal and multifractal features. The fractal dimension and the tensile strength of corroded steel bars exhibit a power function relationship, while the width of multifractal spectrum and tensile strength of corroded steel bars exhibit a linear relationship. By comparison, using width of multifractal spectrum as multifractal damage variable not only reflects the distribution of corrosion damage in reinforcing bars, but also reveals the influence of nonuniform corrosion on the mechanical properties of reinforcing bars. The present research provides a new approach for the establishment of corrosion damage constitutive models of reinforcing bars.
authors.affiliation: School of Materials Science and Engineering, Southeast University, Nanjing, Jiangsu, People's Republic of China.
authors.forename: Yidong
authors.initials: Y
authors.lastname: Xu
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Qian
authors.forename: Lei
authors.initials: L
authors.lastname: Pan
authors.forename: Bingbing
authors.initials: B
authors.lastname: Wang
authors.forename: Chi
authors.initials: C
authors.lastname: Lou
mesh_terms: D002627:Chemistry, Physical; D060389:Construction Industry / Q000379:methods; D003252:Construction Materials / Q000032:analysis* / Q000592:standards; D003343:Corrosion; D055664:Electrochemical Techniques; D008422:Materials Testing / Q000379:methods; D055595:Mechanical Phenomena; D008954:Models, Biological; D008962:Models, Theoretical; D013232:Steel / Q000032:analysis; D013314:Stress, Mechanical; D013718:Tensile Strength; D013997:Time Factors
chemical_list: D013232:Steel