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. Author manuscript; available in PMC: 2020 Dec 1.
Published in final edited form as: Biomaterials. 2019 Sep 17;225:119493. doi: 10.1016/j.biomaterials.2019.119493

Table 4:

Parameters for hyperelastic Mooney-Rivlin models of anisotropic PVA-BC nanocomposite, showing the accuracy of various models using different numbers of coefficients [176].

a10 a01 a20 a11 a02 Absolute error (%)
Longitudinal direction
Two parameters −0.144 −0.13 0 0 0 4.16
Three parameters −0.446 0.499 0.0330 0 0 1.47
Five parameters −3.906 4.095 27.240 −72.51 50.882 0.15
Circumferential direction
Two parameters 1.365 −1.374 0 0 0 3.38
Three parameters 2.790 3.053 2.396 0 0 0.98
Five parameters −26.778 28.001 184.86 −492.57 346.379 0.07