The influence of interbedded stronger layers on fracture development
mediaposted on 19.08.2021, 14:27 by Emma FinchEmma Finch
Compression experiments comparing fracture development varying the initial strength of the sample material to contain interbedded stronger layers.
The movies show the development of fractures with layering on the left-hand side to help with interpretation and the evolution of failure on the right (the intensity of colour indicating the number of bonds broken). The strength of the yellow layers are 10x the strength of the blue/grey ones.
The left- and right-hand boundary elements behave as a jacket to constrain the sample. Initial fractures are oriented at 60/30 degrees to the compressing plates, but the models are pushed beyond the development of the first through-going fracture resulting in the higher angle cross-cutting faults present at the end of the movies.
Comparison between experiments is presented in the '*compare.gif' files relative to both layers and bonds. The evolution of the experiments is reversed in the *reverse.gif files.
This relates to movies in the following link which show an investigation of the effect of sample strength on fracturing.