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Subsubsection 4.2.1.2: Fiber with Neo-Hookean Law Up Subsection 4.2.1: Unconstrained Fiber Models Subsection 4.2.2: Uncoupled Fiber Models

#### 4.2.1.3 Fiber with Toe-Linear Response

This material type is “fiber-pow-linear”. The following material parameters need to be defined:
 the fiber modulus in the linear range ( [P] the power-law exponent in the toe region ( [ ] the stretch ratio when the toe region transitions to the linear region ( [ ]
The fiber strain energy density is given by where , Example:
Fiber model as specified in a solid mixture (Section 4.1.3.22↑)
<solid type="fiber-pow-linear">
<fiber type="angles">
<theta>20</center>
<phi>90</phi>
</fiber>
<E>1</E>
<beta>2.5</beta>
<lam0>1.06</lam0>
</solid>


Subsubsection 4.2.1.2: Fiber with Neo-Hookean Law Up Subsection 4.2.1: Unconstrained Fiber Models Subsection 4.2.2: Uncoupled Fiber Models