/INTER/TYPE14

For this interface, generally, use a mesh whose size is finer than the lowest semi- axis of main surface. The main surface must be a MADYMO hyper-ellipsoidal surface or a Radioss hyper-ellipsoidal surface.

Format

Definitions

Comments

1. Elastic force is defined as:(1)
   $$F_e^{\mathit{total}}=\sum F_e^{\mathit{local}}=\mathit{Stif}\cdot f_{ld}(\mathit{Penetratio}{\mathit{n}}_{max})$$

   While,

   $F_e^{\mathit{total}}=\mathit{Stif}\cdot \mathit{Penetration}$ , if fct_ID_ld is 0

   $F_e^{\mathit{total}}=\mathit{Stif}\cdot {\text{f}}_{ld}(\mathit{Penetratio}{\mathit{n}}_{max})\cdot \frac{\mathit{Penetration}}{\sum Penetrations}$ , otherwise ${\mathrm{f}}_{ld}$ is function of fct_ID_ld

2. Tangential force is defined as:(2)
   $$F_t\le \mathit{Fric}\cdot {\text{f}}_f\left(F_e^{\mathit{local}}\right)\cdot F_e^{\mathit{local}}$$

   With ${\mathrm{f}}_f$ is function of fct_ID_f

3. Damping force is defined as:(3)
   $$F_d=C\cdot V_n$$
   With, $V$ being the normal velocity of the secondary node:(4)

   $$C=Visc\cdot {\mathrm{f}}_{d1}\left(V_n\right)\cdot {\mathrm{f}}_{d2}\left(F_e{}^{local}\right)$$

   ${\mathrm{f}}_{d1}$ and ${\mathrm{f}}_{d2}$ are functions of fct_ID_d1 and fct_ID_d2.