OS-V: 1210 Contact with Friction

Model Files

Benchmark Model

The finite element model consists of a deformable block on which enforced velocities are applied causing it to slide over a rigid fixed block.

Both blocks are meshed with first-order CHEXA elements and frictional contact is defined between the blocks with a friction coefficient of 0.05. The bottom block is constrained in all directions. One side of the top block is constrained along the Y direction, while the opposite side is subjected to an enforced velocity and constrained along the X, Y, and Z rotational degrees of freedom. The upper side of the top block is subjected to an enforced velocity and is constrained along the X, Y, and Z rotational degrees of freedom.

The Y and Z directional velocities are applied in the form of a sinusoidal variation as a function of time ( $t$ ) given by:

Where, $V_m$ and $T$ for Y and Z velocities are:

Direction	$V_m$	$T$
Y	565 mm/s	0.009 s
Z	-102 mm/s	0.001 s

Results

The Y displacement results are compared between OptiStruct and Radioss at a node on the side where Y-velocity is applied. They seem to be in good agreement (Figure 3).