Nano-indentation and avalanches in compressed porous SiO2
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Salje, Ekhard Karl
Abstract
The “nano-indentation continuous stiffness measurement technique” has been employed to analyze the failure dynamics of mesoporous SiO2 based material (Vycor). The depth dependence of the indentation hardness (H), elastic modulus (E), and elastoplastic parameter (S2/P) shows crackling noise, which has been analyzed to monitor the jerky strain release. The noise is power law distributed with exponents near ∼1.5 over several decades, confirming avalanche criticality. This value is in good agreement with literature results obtained by other techniques and with earthquake statistics.
Description
Keywords
4005 Civil Engineering, 40 Engineering
Journal Title
Applied Physics Letters
Conference Name
Journal ISSN
0003-6951
1077-3118
1077-3118
Volume Title
115
Publisher
American Institute of Physics
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/P024904/1)
EPSRC