Summary of procedures for measuring and calculating hyperelastic skin material properties.

<p>(<b>A</b>) Example plot of force and displacement versus time. Illustration of SIF compensation of force traces, where interval A is the interval picked for curve-fitting in compensating error caused by SIF, and contact point B. Solid black line: force. Dashed gray line: displacement. Dashed black line: curve fit for SIF compensation. (<b>B</b>) Schematic force vs. displacement plot. k₀ is the slope of the linear region, which indicates the initial stiffness of skin. (<b>C</b>) Schematic stress vs. change in stretch plot. E₀ is the slope of the linear region, which indicates the initial Young's modulus of skin.