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. Author manuscript; available in PMC: 2013 Apr 3.
Published in final edited form as: Biomech Model Mechanobiol. 2008 Nov 2;8(5):345–358. doi: 10.1007/s10237-008-0139-9

Fig. 7.

Fig. 7

Indentation stress versus strain (0.2 a/R) for representative microindentations of the PVA gel, mouse cartilage extracellular matrix, and chondrocytes. Data are from the Fung fit of sample AFM datasets (PVA E0 = 19.1 kPa, matrix E0 = 20.7 kPa, chondrocyte E0 = 12.2 kPa). The stress–strain response of the PVA gel appears linear (due to the scaling, nonlinearity is not obvious) while the cartilage components are highly nonlinear. Inset shows the relationship up to 2% strain