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%% Copyright 2014 MERCIER David
function lossModulus = ...
loss_modulus(harmonicDamping, freqOscil, contact_area, varargin)
%% Function used for the calculation of the loss modulus from dynamic nanoindentation
% harmonicDamping : Harmonic contact damping in (N.s)/nm
% freqOscil : Frequency of the small dynamic oscillation in Hz
% contact_area : Contact area in nm2
% loss_modulus: The loss modulus in GPa
if nargin == 0
contact_area = 5e7;
freqOscil = 45;
harmonicDamping = 0.001;
end
lossModulus = 10^6 .* (harmonicDamping * freqOscil)/2 .* ...
(pi./contact_area).^0.5;
end
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