2011/04/22 by G. Timár, Gabor Timar, Ferenc Kun · 8 citations
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Bending #Brittleness #Composite material #Computer science #Discretization #Engineering #Exponential function #Fatigue and fracture mechanics #Fracture (geology) #Fracture mechanics #Geometry #High-Velocity Impact and Material Behavior #Materials science #Mathematical analysis #Mathematics #Mechanics #Mesoscopic physics #Noise (video) #Physics #Point (geometry) #Rock Mechanics and Modeling #Scaling #Statistical physics #Structural engineering #cond-mat.dis-nn
paper · pdf · doi:10.1103/physreve.83.046115
published in Physical Review E 83(4), 046115 (American Physical Society) · 11 pages, 15 figures
openalex publication_date 2011/04/22 · arxiv created 2011/04/27 · arxiv updated 2011/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the crackling noise emerging during single crack propagation in a specimen under three-point bending conditions. Computer simulations are carried out in the framework of a discrete element model where the specimen is discretized in terms of convex polygons and cohesive elements are represented by beams. Computer simulations revealed that fracture proceeds in bursts whose size and waiting-time distributions have a power-law functional form with an exponential cutoff. Controlling the degree of brittleness of the sample by the amount of disorder, we obtain a scaling form for the characteristic quantities of crackling noise of quasibrittle materials. Analyzing the spatial structure of damage we show that ahead of the crack tip a process zone is formed as a random sequence of broken and intact mesoscopic elements. We characterize the statistics of the shrinking and expanding steps of the process zone and determine the damage profile in the vicinity of the crack tip.