ANSYS Explicit Dynamics-Explicit Dynamics: Body Interactions

•The Body Interactions folder, under Connections, is used to define global connection options for Explicit Dynamics

•

–Contact Detection

–

•Trajectory (default)

–Formulation

–Shell Thickness Factor

–Tolerence

–

•Proximity Based

–Pinball Factor

–Timestep Safety Factor

–Limiting Timestep Velocity

–Edge On Edge Contact

–

–Body Self Contact

–

Element Self Contact

•Recommended option for impact and sliding contact between Solids, Shells and Beams.

•The trajectory of nodes and faces are tracked during the computation cycle. If the trajectory of a node and a face intersects during the cycle a contact event is detected (see figure).

•Trajectory based contact does not constrain the time step

–Often provides the most efficient solution.

•Nodes which penetrate into another element at the start of the simulation will be ignored for contact and should be avoided.

–To generate duplicate conforming nodes across a contact interface

a)Use the multi-body part option in DesignModeler and set the  Shared Topology Method to either Imprint or None

b)In Meshing use Arbitrary Match Control (Sweep) or Match mesh where possible (Patch Independent Tetrahedrons).

 Get free full Tutorial!
Please send me email:
cadxneter@hotmail.com