With sufficient concrete cover, a multi-axial stress state develops in the concrete surrounding the reinforcing bar at both sides of the cracked interface. After increasing interface displacement, the concrete plasticizes in the curvature of the bent bar and the bar partially detaches from the concrete at the opposite side of displacement. Thus, for high displacements, no unimpaired bond between reinforcement and concrete can be assumed. With further increasing lever arm, the bending capacity of the bar becomes decisive for the load bearing resistance, which is achieved after a plastic hinge develops in the reinforcing bar. For bending failure, the bar should be embedded in the concrete with at least 6 diameters at both sides. If no sufficient concrete cover is available, the bar may break the concrete cover and concrete failure occurs.