Table 1 Various periodic cracks in nature.
From: Universality of periodicity as revealed from interlayer-mediated cracks
Periodicity scale | Medium thickness/period | Medium | Crack confinement | Biaxial stress | Ref. |
|---|---|---|---|---|---|
μm | 0.006–0.1 | SiO2 | Interlayer | Thermal stress | This study |
μm | 0.005–0.05 | Sol-gel dielectric | Self-debonding | Drying densification | |
μm | 0.007–0.009 | Mo/Si superlattice | Self-debonding | Thermal stress | |
μm | 0.014–0.13 | Colloidal latex or silica | Straight cracks nearby | Drying densification | |
cm | 0.015–0.06 | Glass | Cylindrical shape | Hydraulic pressure | |
m | 0.03–0.1 | Polyethylene | Cylindrical shape | Hydraulic pressure | |
mm | 0.001–0.006 | Polypropylene | Attachment to side frames | Blunt tool | |
km | 0.03 | Ice | ? | Water freezing |
