Model Parameters from Test Data

  • Robert M. Hackett


The establishment of a meaningful hyperelastic model displaying an appropriate strain-energy function is of primary importance for accurate prediction of the response of highly deformable bodies. This can be accomplished with the employment of classic models, a number of which have been presented earlier, or possibly through the formulation of a completely new and different strain-energy function; the Gent model is specifically emphasized in this chapter. Selection of parameters that appropriately characterize the response/behavior of the material to be modeled is obviously extremely important; identifying the methodology for determining the actual values of the parameters is also of great importance. In order to decide whether a specific model accurately characterizes the range of response of a particular real material, it is necessary to compare predictions made with the model to results obtained from laboratory tests on the real material. Different tests are described and their appropriateness for producing data for particular model parameters is discussed. In addition to engineering materials, soft biological tissue is an area of focus in this chapter.


Model parameters Strain-energy function Gent model Tensile test Cauchy stress Rubber vulcanizates Polymers Foams Soft biological tissue 


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© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Robert M. Hackett
    • 1
  1. 1.Department of Civil EngineeringThe University of MississippiUniversityUSA

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