Analysisof Constitutive Model Parameters of Adipose Tissue Materials on Mechanical Response Sensitivity
[Purposes]The parameter sensitivity of each material constitutive of adipose material was de-termined in order to simplify the inverse parameter variables reasonably and improve the efficiency of material calibration.[Methods]Unconstrained compression tests were carried out on four commonly used material constitutive models of adipose tissue,and the parameters of each material constitutive model were and analyzed to study the influence of each material parameter on the mechanical response of each material constitutive model.[Findings]The results show that the short-time shear modulus and decay constant have significant effects on the maximum contact force in the linear viscoelastic material.In the Mooney-Rivlin hyperelastic constitutive,the material constant has a greater influence on the maxi-mum contact force,the Ogden coefficient has the most significant effect on the maximum contact force in the Ogden hyperelastic constitutive model.The influence of material constants on the maximum contact force is significant for soft issue constitutive model.[Conclusions]It provides a reference for the rational simplification of adipose tissue material mechanical properties research and parameter inversion work,and greatly improves the calculation efficiency.
adipose tissueconstitutive modematerial parametersdesign of experiment
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