Figure 2.

a,b. When cycled in regime I, collagen fibrils demonstrated repeatable hysteresis that reached steady-state after the very first cycle. c. Inelastic strain reaching a steady-state value after the first three cycles. Also shown is the peak stress during mechanical cycling. d. Elastic modulus insensitivity to mechanical cycling. e. Energy dissipation per loading cycle reaching steady-state after the first cycle. For the data shown, the fibril diameter was 197 nm.