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Transient damage spreading and anomalous scaling in mortar crack surfaces

Morel, Stéphane and Donamy, Daniel and Ponson, Laurent and Bouchaud, Elisabeth (2008) Transient damage spreading and anomalous scaling in mortar crack surfaces. Physical Review E, 78 (1). Art. No. 016112. ISSN 1539-3755. doi:10.1103/PhysRevE.78.016112.

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The scaling properties of a post-mortem mortar crack surface are investigated. The root mean square of the height fluctuations is found to obey anomalous scaling properties, but with three exponents, two of them characterizing the local roughness (zeta~=0.79 and zetae~=0.41) and the third one driving the global roughness (zetag~=1.60). The critical exponent zeta~=0.79 is conjectured to reflect damage screening occurring for length scales smaller than the process zone size, while the exponent zetae~=0.41 characterizes roughness at larger length scales, i.e., at length scales where the material can be considered as linear elastic. Finally, we argue that the global roughness exponent could be material dependent contrary to both local roughness exponents (zeta~=0.8 and zetae~=0.4) which can be considered as universal.

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Additional Information:©2008 The American Physical Society. (Received 19 July 2007; revised 13 May 2008; published 23 July 2008) We thank G. Mourot for providing the experimental results on mortar rupture. This work has received financial support from the Région Aquitaine.
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Région AquitaineUNSPECIFIED
Subject Keywords:critical exponents; mortar; plastic deformation; surface cracks
Issue or Number:1
Record Number:CaltechAUTHORS:MORpre08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11234
Deposited By: Archive Administrator
Deposited On:26 Jul 2008 03:11
Last Modified:08 Nov 2021 21:34

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