Contact

To define the interaction between two or more bodies in numgeo

1. First define the interaction type:

   *Interaction, Name=<name>, [user]
   *Normal, Mechanical=<>, [no separation], [stiffness_factor=<>], [non constant]
   <Normal contact model properties>
   *Friction, model=<friction model name>, [stiffness_factor=<>]
   <Properties of the friction model>
   

2. Use the defined interaction in a contact pair:

   *Contact pair, Interaction=<interaction name>, Discretisation=<Discretisation type> [,Adjust] [, Perturbation] [,General]
   <Slave Surface>, <Master Surface>
   

3. Optionally define special contact options:

   *Contact options, Name=<interaction name>, [clearance=<normal contact distance>], [ Check Disp = <Fraction of contact length>], [ Check Dist = <Fraction of contact length>]
   

The sub-keywords following are given in the following Sections.