Semiflexible biopolymer networks are typically cross linked by noncovalent interactions. Such cross linkers continually form and break over, allowing the network’s topology to evolve over time and in response to applied stress. The effects of transient cross linking are reflected in glassy power-law rheology at low frequencies^1, energy dissipation through linker rupture^2, mechanomemory effects [S. Majumdar et al., unpublished (2017).], and self-healing^3. To better explore these extremely low frequency dynamical processes, we developed a finite element kinetic Monte Carlo simulation approach that allows for linker binding and rupture within a three-dimensional network. In this talk, we discuss our simulation method and present results for stress relaxation of sheared networks mediated by linker reorganization.
1 K. W. Muller, R. F. Bruinsma, O. Lieleg, A. R. Bausch, W. A. Wall, and A. J. Levine, Phys Rev Lett 112 (23), 238102 (2014).
2 C. Vaca, R. Shlomovitz, Y. Yang, M. T. Valentine, and A. J. Levine, Soft matter 11 (24), 4899 (2015).
3 Y. Yang, E. Barry, Z. Dogic, and M. F. Hagan, Soft matter 8 (3), 707 (2012).