Algorithm 1.

input : AFM force curve, $R_{Dim,thesh}^2$, $R_{FE,thresh}^2$.

output: Material parameters

Multiply deflection with probe spring constant to obtain force;

Contact Estimation: Estimate contact point using weighted constrained BDP;

Dimitriadis Curve fitting: Fit F – Δ to Dimitriadis contact model to obtain EDim, $R_{Dim}^2$;

if $R_{Dim}^2>R_{Dim,thesh}^2$ then

Linear Elasticity: Estimated material parameter: Ê ← EDim;

else

Hyperelasticity: initialize C0 ← EDim/6, b ← 30;

Invoke Inverse FE routine with $R_{FE,thresh}^2$;

Estimated material parameters: Ê0 ← 6Ĉ0, b̂;

end