Crackling versus Continuumlike Dynamics in Brittle Failure
نویسندگان
چکیده
منابع مشابه
Fluctuations of global energy release and crackling in nominally brittle heterogeneous fracture.
The temporal evolution of mechanical energy and spatially averaged crack speed are both monitored in slowly fracturing artificial rocks. Both signals display an irregular burstlike dynamics, with power-law distributed fluctuations spanning a broad range of scales. Yet, the elastic power released at each time step is proportional to the global velocity all along the process, which enables defini...
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Skutterudites based on CoSb3 have high thermoelectric efficiency, but the low fracture strength is a serious consideration for commercial applications. To understand the origin of the brittleness in CoSb3, we examine the response along various shear and tensile deformations using density functional theory. We find that the Co−Sb bond dominates the ideal strength. Among all the shear and tensile...
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A numerical multiple crack interaction model was developed to simulate the failure process in brittle solids containing significant populations of flaws. The model, which is 2D, allows for the growth of microcracks on a regular array of potential crack sites. Individual cracks may be oriented vertically, horizontally or at 450 to the sample axes. Quasi-static equilibrium equations are expressed...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2013
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.111.054301