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Active drive towards elastic spinodals.

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Active matter self-drives toward unique mechanical states called elastic spinodals. This behavior allows for controlled rigidity changes and the formation of dynamic force chains in active solids.

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Area of Science:

  • Physics
  • Materials Science
  • Biophysics

Background:

  • Active matter, like the actomyosin cytoskeleton, exhibits adaptive and unconventional mechanical properties.
  • These materials can explore material parameter space, accessing extreme mechanical regimes.

Purpose of the Study:

  • To extend the concept of spinodal states to active solids.
  • To demonstrate how active solids can access these extreme mechanical regimes.
  • To investigate the role of nonlinearity in spinodal crossing and microstructure formation.

Main Methods:

  • Theoretical extension of classical spinodal concepts to active solids.
  • Analysis of nonlinear systems exhibiting elastic spinodal crossing.
  • Investigation of microstructure evolution and force channeling.

Main Results:

  • Active matter actively accesses elastic spinodal regimes.
  • Proximity to spinodal states leads to stress localization and active force chain formation.
  • Nonlinear spinodal crossing creates new energy wells and intrinsic force channeling in the microstructure.

Conclusions:

  • Active solids can actively navigate toward and utilize extreme mechanical states (elastic spinodals).
  • Elastic spinodals are crucial for controlled rigidity dynamics and the emergence of adaptable force transmission mechanisms.
  • Force channeling becomes an inherent property of the microstructure in nonlinear active solids near spinodals.