Daniel Bonamy 2009 J. Phys. D: Appl. Phys. 42 214014 doi:10.1088/0022-3727/42/21/214014
Daniel Bonamy
Show affiliationsStress enhancement in the vicinity of brittle cracks makes the macro-scale failure properties extremely sensitive to the micro-scale material disorder. Therefore, (i) fracturing systems often display a jerky dynamics, so-called crackling noise, with seemingly random sudden energy release spanning over a broad range of scales, reminiscent of earthquakes; (ii) fracture surfaces exhibit roughness at scales much larger than that of material microstructure. Here, I provide a critical review of experiments and simulations performed in this context, highlighting the existence of universal scaling features, independent of both the material and the loading conditions, reminiscent of critical phenomena. I finally discuss recent stochastic descriptions of crack growth in brittle disordered media that seem to capture qualitatively—and sometimes quantitatively—these scaling features.
62.20.M- Structural failure of materials
68.35.Gy Mechanical properties; surface strains
91.30.Px Phenomena related to earthquake prediction
61.43.Bn Structural modeling: serial-addition models, computer simulation
81.40.Np Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure
Surfaces, interfaces and thin films
Issue 21 (7 November 2009)
Received 18 March 2009, in final form 27 June 2009
Published 22 October 2009
Daniel Bonamy 2009 J. Phys. D: Appl. Phys. 42 214014
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