Fig. 2 | Scientific Reports

Fig. 2

From: Usage of the adaptive quasi-linear viscoelastic model to predict load-unload, stress-relaxation, and sine load of porcine liver

Fig. 2

Loading-unloading tests. Top: mean stress-strain curves with shaded standard deviation, data in blue, AQLV model in black. Left: original model, whereby the parameters of the AQLV model were calibrated at the hold phases simultaneously in a four strain level ramp-hold experiment. Right: re-calibrated model to the unloading phase of the load-unload experiment. \(\dot{\epsilon }\): mean strain rate. r: Spearman rank correlation coefficient, RMSE: root mean squared error. Bottom: AQLV model parameters, black for the original model, and magenta for the re-calibrated model, individual data points are shaded.

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