TY - JOUR
T1 - Crack spacing in strained films
AU - Guzina, B. B.
AU - Timm, D. H.
AU - Voller, V. R.
PY - 2004/12/1
Y1 - 2004/12/1
N2 - Consider a thin film resting on a relatively thick substrate, When the substrate is subjected to an axial strain transverse cracks, normal to the direction, of the applied strain may appear in the film, It is observed that, for a given strain, the spacing between such cracks is uniform, with a clearly identifiable characteristic length scale that can be used to provide bounds on the spacing, Further, as the strain is increased, there is a densification of the cracks up to a saturation limit. Beyond the saturation limit additional strain produces no further cracks and the characteristic crack length scale for the given system remains fixed. This paper presents analytical models that can be used to predict the characteristic length scale both at the saturation limit and during the densification process. The models are shown to be applicable across a wide range of length scales; with abilities to determine the crack space length scale in both asphalt pavements (∼100m) subjected to a thermal loading and strained ceramic films (∼100nm).
AB - Consider a thin film resting on a relatively thick substrate, When the substrate is subjected to an axial strain transverse cracks, normal to the direction, of the applied strain may appear in the film, It is observed that, for a given strain, the spacing between such cracks is uniform, with a clearly identifiable characteristic length scale that can be used to provide bounds on the spacing, Further, as the strain is increased, there is a densification of the cracks up to a saturation limit. Beyond the saturation limit additional strain produces no further cracks and the characteristic crack length scale for the given system remains fixed. This paper presents analytical models that can be used to predict the characteristic length scale both at the saturation limit and during the densification process. The models are shown to be applicable across a wide range of length scales; with abilities to determine the crack space length scale in both asphalt pavements (∼100m) subjected to a thermal loading and strained ceramic films (∼100nm).
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U2 - 10.1051/jp4:2004120023
DO - 10.1051/jp4:2004120023
M3 - Conference article
AN - SCOPUS:33645079906
SN - 1155-4339
VL - 120
SP - 201
EP - 208
JO - Journal De Physique. IV : JP
JF - Journal De Physique. IV : JP
T2 - ICTPMCS: 2nd International Conference on Thermal Process Modelling and Computer Simulation
Y2 - 31 March 2003 through 2 April 2003
ER -