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Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter (peer-reviewed)peer-review

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Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. / Parisi, Andrea.
Earthquakes and Acoustic Emission: Selected Papers from the 11th International Conference on Fracture, Turin, Italy, March 20-25, 2005. ed. / Alberto Carpinteri; Giuseppe Lacidogna. CRC Press, 2007. p. 89-94.

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter (peer-reviewed)peer-review

Harvard

Parisi, A 2007, Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. in A Carpinteri & G Lacidogna (eds), Earthquakes and Acoustic Emission: Selected Papers from the 11th International Conference on Fracture, Turin, Italy, March 20-25, 2005. CRC Press, pp. 89-94.

APA

Parisi, A. (2007). Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. In A. Carpinteri, & G. Lacidogna (Eds.), Earthquakes and Acoustic Emission: Selected Papers from the 11th International Conference on Fracture, Turin, Italy, March 20-25, 2005 (pp. 89-94). CRC Press.

Vancouver

Parisi A. Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. In Carpinteri A, Lacidogna G, editors, Earthquakes and Acoustic Emission: Selected Papers from the 11th International Conference on Fracture, Turin, Italy, March 20-25, 2005. CRC Press. 2007. p. 89-94

Author

Parisi, Andrea. / Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. Earthquakes and Acoustic Emission: Selected Papers from the 11th International Conference on Fracture, Turin, Italy, March 20-25, 2005. editor / Alberto Carpinteri ; Giuseppe Lacidogna. CRC Press, 2007. pp. 89-94

Bibtex

@inbook{21a1cf08bd374afeb3dc09456612ccfa,
title = "Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture",
abstract = "We show by computer simulations that acoustic emission from the crack tip strongly reduces the delivery of fracture work, due to the coupling between the crack speed and the acoustic branches in dispersive media. The direct consequence is a selection criterion for the terminal crack speed which, for planar cracks, produces results corresponding to those found in experiments on highly anisotropic materials. In case of isotropic material with cracks of unrestricted geometry, the drop in the crack speed with respect to the planar case is connected to a mechanism of attempted branching, which is also responsible for the logarithmic roughness of the final fracture for marginal loadings. Higher loadings lead to a well defined roughness exponent of ζ ~ 0.45 compatible with that measured experimentally at short length scales, and in our simulations clearly connected with the generation of macroscopic branches.",
author = "Andrea Parisi",
year = "2007",
language = "English",
isbn = "9870415444026",
pages = "89--94",
editor = "Alberto Carpinteri and Giuseppe Lacidogna",
booktitle = "Earthquakes and Acoustic Emission",
publisher = "CRC Press",

}

RIS

TY - CHAP

T1 - Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture

AU - Parisi, Andrea

PY - 2007

Y1 - 2007

N2 - We show by computer simulations that acoustic emission from the crack tip strongly reduces the delivery of fracture work, due to the coupling between the crack speed and the acoustic branches in dispersive media. The direct consequence is a selection criterion for the terminal crack speed which, for planar cracks, produces results corresponding to those found in experiments on highly anisotropic materials. In case of isotropic material with cracks of unrestricted geometry, the drop in the crack speed with respect to the planar case is connected to a mechanism of attempted branching, which is also responsible for the logarithmic roughness of the final fracture for marginal loadings. Higher loadings lead to a well defined roughness exponent of ζ ~ 0.45 compatible with that measured experimentally at short length scales, and in our simulations clearly connected with the generation of macroscopic branches.

AB - We show by computer simulations that acoustic emission from the crack tip strongly reduces the delivery of fracture work, due to the coupling between the crack speed and the acoustic branches in dispersive media. The direct consequence is a selection criterion for the terminal crack speed which, for planar cracks, produces results corresponding to those found in experiments on highly anisotropic materials. In case of isotropic material with cracks of unrestricted geometry, the drop in the crack speed with respect to the planar case is connected to a mechanism of attempted branching, which is also responsible for the logarithmic roughness of the final fracture for marginal loadings. Higher loadings lead to a well defined roughness exponent of ζ ~ 0.45 compatible with that measured experimentally at short length scales, and in our simulations clearly connected with the generation of macroscopic branches.

M3 - Chapter (peer-reviewed)

SN - 9870415444026

SP - 89

EP - 94

BT - Earthquakes and Acoustic Emission

A2 - Carpinteri, Alberto

A2 - Lacidogna, Giuseppe

PB - CRC Press

ER -