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The long curving cracks are the "primary" ones that happen first. The secondary cracks hit the primaries at 90 degrees. Tertiary cracks also do this --- the net result is statistically mostly T junctions and square "peds".
Hexagonal peds and Y junctions emerge from iteratively wetting and drying.
Lab experiment by Mary Miedema
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N 10
B 3.3K
C 1
E May 26, 2009
F May 26, 2009
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Mud cracks in a lab experiment done by drying thin layers of aluminum oxide powder and water.
Tags: emergence pattern formation physics texture instability fracture cracks crack nonlinear patternformation experiment
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N 0
B 1.2K
C 0
E Jul 7, 2014
F Jul 7, 2014
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A short film by Mary Miedema
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The first iteration of a mud crack experiment.
Image by Mary Miedema.
see
www.physics.utoronto.ca/nonlinear/abstracts/MM_phy479_201...
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N 0
B 923
C 1
E May 13, 2015
F May 13, 2015
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A layer of K Bentonite clay is dried, wetted and dried again through 45 cycles. You can see how the crack pattern evolves from mostly T junctions and square "peds" to Y junctions and 6 sided peds.
Film by Mary Miedema
See www.physics.utoronto.ca/nonlinear/papers_mud.html
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