TY - JOUR
T1 - Intrinsic nature of anomalous crack roughening in an anisotropic brittle composite
AU - Balankin, Alexander S.
AU - Matamoros, Daniel M.
AU - Campos, Ivan
PY - 2000/3
Y1 - 2000/3
N2 - Crack traces in paper sheets obey different scaling behaviours, according to whether a crack grows along or across the machine direction of the paper. Cracks across the machine direction possess statistical self-affine invariance, governed by the local roughness (Hurst) exponent H < 1, whereas cracks growing along the machine direction display an anomalous roughening, characterized by different roughness exponents in the local and global scales. Although the local roughness exponent H does not depend on the crack orientation in a given paper, both the local (H < 1) and global (α > H) exponents are dependent on the material structure. The cause of anomalous roughening is the intrinsically anomalous power spectrum (structure factor) of cracks growing along the fibres. A diffusion model of brittle crack growth in an anisotropic composite is developed.
AB - Crack traces in paper sheets obey different scaling behaviours, according to whether a crack grows along or across the machine direction of the paper. Cracks across the machine direction possess statistical self-affine invariance, governed by the local roughness (Hurst) exponent H < 1, whereas cracks growing along the machine direction display an anomalous roughening, characterized by different roughness exponents in the local and global scales. Although the local roughness exponent H does not depend on the crack orientation in a given paper, both the local (H < 1) and global (α > H) exponents are dependent on the material structure. The cause of anomalous roughening is the intrinsically anomalous power spectrum (structure factor) of cracks growing along the fibres. A diffusion model of brittle crack growth in an anisotropic composite is developed.
UR - http://www.scopus.com/inward/record.url?scp=0034160286&partnerID=8YFLogxK
U2 - 10.1080/095008300176290
DO - 10.1080/095008300176290
M3 - Artículo
SN - 0950-0839
VL - 80
SP - 165
EP - 172
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
IS - 3
ER -