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

Data Science Institute

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

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Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. / Parisi, Andrea; Ball, Robin C.
11th International Conference on Fracture 2005, ICF11. Vol. 7 2005. p. 5345-5349.

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

Harvard

Parisi, A & Ball, RC 2005, Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. in 11th International Conference on Fracture 2005, ICF11. vol. 7, pp. 5345-5349, 11th International Conference on Fracture 2005, ICF11, Turin, Italy, 20/03/05.

APA

Parisi, A., & Ball, R. C. (2005). Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. In 11th International Conference on Fracture 2005, ICF11 (Vol. 7, pp. 5345-5349)

Vancouver

Parisi A, Ball RC. Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. In 11th International Conference on Fracture 2005, ICF11. Vol. 7. 2005. p. 5345-5349

Author

Parisi, Andrea ; Ball, Robin C. / Consequences of acoustic emission on crack speed and roughness exponent in brittle dynamic fracture. 11th International Conference on Fracture 2005, ICF11. Vol. 7 2005. pp. 5345-5349

Bibtex

@inproceedings{d368c5a8437643e6b5527f7e04590807,

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 and Ball, {Robin C.}",

year = "2005",

language = "English",

isbn = "9781617820632",

volume = "7",

pages = "5345--5349",

booktitle = "11th International Conference on Fracture 2005, ICF11",

note = "11th International Conference on Fracture 2005, ICF11 ; Conference date: 20-03-2005 Through 25-03-2005",

}

RIS

TY - GEN

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

AU - Parisi, Andrea

AU - Ball, Robin C.

PY - 2005

Y1 - 2005

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 - Conference contribution/Paper

AN - SCOPUS:84869814275

SN - 9781617820632

VL - 7

SP - 5345

EP - 5349

BT - 11th International Conference on Fracture 2005, ICF11

T2 - 11th International Conference on Fracture 2005, ICF11

Y2 - 20 March 2005 through 25 March 2005

ER -

Research