Fig. 4
From: Weakening behavior of the shallow megasplay fault in the Nankai subduction zone
Experimental results for friction slip dependence. Slip dependence of friction as a function of effective normal stress in both velocity step and constant velocity experiments. Friction slip dependence is shown for A 3–5 mm and B 8–10 mm displacement. C Friction-displacement curves for 0.1 µm/s graphically normalized by peak friction to illustrate slip weakening behavior from peak friction toward “steady-state”. (Inset) Conceptual model of slip weakening behavior under varying effective normal stress. Gray represents data from our direct shear tests with 10 mm maximum displacement