Avalanche criticality during compression of porcine cortical bone of different ages.
Jasiuk, Iwona M
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics
American Physical Society
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Baró, J., Shyu, P., Pang, S., Jasiuk, I. M., Vives, E., Salje, E., & Planes, A. (2016). Avalanche criticality during compression of porcine cortical bone of different ages.. Physical Review E: Statistical, Nonlinear, and Soft Matter Physics, 93 (5), 053001-053001. https://doi.org/10.1103/PhysRevE.93.053001
Crack events developed during uniaxial compression of cortical bones cut from femurs of developing pigs of several ages (4, 12, and 20 weeks) generate avalanches. These avalanches have been investigated by acoustic emission analysis techniques. The avalanche energies are power-law distributed over more than four decades. Such behavior indicates the absence of characteristic scales and suggests avalanche criticality. The statistical distributions of energies and waiting times depend on the pig age and indicate that bones become stronger, but less ductile, with increasing age. Crack propagation is equally age-dependent. Older pigs show, on average, larger cracks with a time distribution similar to those of aftershocks in earthquakes, while younger pigs show only statistically independent failure events.
The group from Barcelona acknowledges financial support from CICyT (Spain), Projects No. MAT2013-40590-P and No. MAT2015-69777-REDT. E.K.H.S. is grateful to EPSRC for support under Grant No. EP/K009702/1. I.J. gratefully acknowledges support from the National Science Foundation (NSF) the DMR Program Grant No. 15-07169.
External DOI: https://doi.org/10.1103/PhysRevE.93.053001
This record's URL: https://www.repository.cam.ac.uk/handle/1810/255818