کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
805145 1467818 2010 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Self-organized criticality of deformation and prospects for fracture prediction
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Self-organized criticality of deformation and prospects for fracture prediction
چکیده انگلیسی
The paper considers common nonlinear characteristics of inelastic deformation and fracture of loaded solids and similarity of numerical solutions of a nonlinear system of relevant partial differential equations. The self-similarity of inelastic strain and damage accumulation in the entire hierarchy of scales-from interatomic distances up to tectonic faults of many thousands of kilometers in the Earth crust-ensures qualitative similarity of fracture scenarios whatever the scale of deformation and rheology of a medium. The common properties of deformed systems are spatial localization of inelastic strain and damage accumulation in the entire hierarchy of scales, further temporal strain localization as a superfast autocatalytic blow-up process, slow dynamics (deformation fronts or slow motions), and strain activity migration due to long-range space-time correlations over the entire hierarchy of scales. Thus, fracture evolves as a sequence of catastrophes of increasing scales up to macroscales. It is shown that self-organized criticality of any deformed system does not exclude the possibility to predict the time and the place of a future catastrophic event. Precursors of similar large-scale events can be (i) frozen strain activity in the immediate vicinity of a formed main crack or fault and (ii) generation of trains of deformation fronts (damage fronts) in this region and their flow toward the site of a formed main crack (fault).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physical Mesomechanics - Volume 13, Issues 5–6, September–December 2010, Pages 292-305
نویسندگان
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