In strain gradient elasticity, Koch snowflake pin arrays produce strongly localized trapped wave modes whose sharpness and resonance frequencies are linked to the fractal boundary dimension rather than the number of pins.
Berry, Diffractals, Journal of Physics A: Mathematical and General 12 (6) (1979) 781
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Scattering of Antiplane Shear Waves by Fractals in Strain Gradient Elasticity
In strain gradient elasticity, Koch snowflake pin arrays produce strongly localized trapped wave modes whose sharpness and resonance frequencies are linked to the fractal boundary dimension rather than the number of pins.