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For Linear elastic, enter the Young’s modulus Efiber and Density ρfiber. The defaults are taken From material. Select User defined to enter other values or expressions.
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For Uniaxial data, enter the Uniaxial stress function σax,a and Density ρfiber. The defaults are taken From material. Select User defined to enter other values or expressions. The default user defined expression for σax,a is the linear function 210[GPa]*<item>.eea, where the variable <item>.eea is the elastic strain in the fiber direction, and <item> corresponds to the tag of the Fiber node, for example mbrn.lemm1.fib1. See Fibers for Linear and Nonlinear Elastic Materials in the Structural Mechanics Theory chapter for details and more options.
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The Holzapfel–Gasser–Ogden model defines an exponential strain energy density Wfiber. The values for the Fiber stiffness k1, Model parameter k2, and Fiber dispersion k3 are as a default taken From material. Select User defined to enter other values or expressions.
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Select Linear elastic or Uniaxial data to describe the fiber stiffness. See Linear Elastic Material or Nonlinear Elastic Material for details.
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If User defined is selected from the list, select a Material symmetry — Isotropic, Transversely isotropic, or Anisotropic.
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