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Influence of the material model on predicted volumetric strain. Predicted volumetric strain in a cartilaginous disc under a 1-Hz, 20% sinusoidal compression cycle. (A) Linear viscoelastic material model. (B) Mooney–Rivlin material model. Continuous lines: area in centre. Dotted lines: area halfway between centre and outer rim. Dashed lines: area adjacent to outer rim.
