| 摘要 |
The invention relates to the field of materials characterization, and specifically, to the field of fractographic analysis of the failure of a structure from at least one the fracture surfaces thereof. The invention particularly applies to determining a characteristic length of the damage processes involved in the structural cracking. The method according to the invention comprises, from a topographic map showing, for a set of points {x} located in a midplane of the fracture surface, a height of the fracture surface h(x) relative to the midplane: a step (12) of determining, for each point x on the topographic map, a quantity ωε (x) representative of an average difference in height (δh(x, δx)) ΙδxΙ≤ε between the height h(x) of the fracture surface at point x in question and the height h(x + δx) of the fracture surface at one or more points {x + δx} located inside a circle of radius ε centered on point x in question, a step (13) of determining, according to a test distance δr, a spatial correlation function Cε(δr) representing a spatial correlation between points {x} and points {x + δx} such as ΙδxΙ = δr, and a step (14) of determining a correlation length ξ from the spatial correlation function Cε (δr). |
