J. Phys. IV France
Volume 110, September 2003
Page(s) 729 - 734

J. Phys. IV France
110 (2003) 729
DOI: 10.1051/jp4:20020780

Wave aspects of damage-failure transition and the problem of crack dynamics (experimental and theoretical study)

O.B. Naimark and S.V. Uvarov

Institute of Continuous Media Mechanics, Urals Division, Russian Academy of Sciences

The defect evolution reveals the self-similarity of damage-failure transitions induced by dissipative structures with blow-up damage kinetics for failure hotspots and auto-solitary waves for adiabatic shear bands. The variety of crack dynamic scenario is linked with the excitation of damage localization scales, which subject the crack behavior in post-critical regime and provide stochastic (branching) crack dynamics. Experimental study of crack dynamics was carried out in the preloaded plate PMMA specimen using the high-speed digital camera (REM 100-8) coupled with photo-elasticity method, the point stress recording with a laser system, the failure surface roughness measurement.

© EDP Sciences 2003