English: Strain-hardening elasticity. A bacterium with strain-hardening tethers is simulated as in Figure 4, with fluid moving from left to right as shear stress increases as indicated. Note that the bacterium move forward long distances each time a bond breaks, because the soft tethers elongate long distances. However, by 17 Pa, new bonds do not form in time after bonds break, and the bacterium detaches. Bonds that are activated and not activated are shown as red and green balls, respectively. Native and uncoiled sections of fimbriae are shown as thick gold and thin black lines, respectively.