Micromechanical origin of plasticity and hysteresis in nest-like packings

Abstract

Disordered packings of unbonded, semiflexible fibers represent a class of materials spanning contexts and scales. From twig-based bird nests to unwoven textiles, bulk mechanics of disparate systems emerge from the bending of constituent slender elements about impermanent contacts. In experimental and computational packings of wooden sticks, we identify prominent features of their response to cyclic oedometric compression: non-linear stiffness, transient plasticity, and eventually repeatable velocity-independent hysteresis. We trace these features to their micromechanic origins, identified in characteristic appearance, disappearance, and displacement of internal contacts.

References in corpus (2)

• Jamming of 3D Prolate Granular Materials
• Perspective: Mechanics of randomly packed filaments -- the `bird nest' as meta-material

Cited by in corpus (4)

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• Complex Memory Formation in Frictional Granular Media
• Dispersive wave propagation in disordered flexible fibers enhances stress attenuation
• Strain stiffening due to stretching of entangled particles in random packings of granular materials