A Comparison Study of the Bending of a straight cantilever beam modeled using shell
elements in OptiStruct Nonlinear transient dynamic analysis with
the Radioss Explicit Solution.
Figure 1. FE-Model with Boundary Conditions Figure 2. Geometry of the Problem
Model Description
This example has a simple cantilever beam with an end moment. The moment variation is
modeled by introducing a constant imposed velocity on the free end. The moment is
applied on a rigid body created at one end of the beam and on the other end all the
DOF’s are blocked.
The FE-Model properties are:
Shell Elements
First order Quad elements
The linear isotropic material properties are:
Young's Modulus
1000 MPa
Poisson's Ratio
0
Initial Density
0.01 g/mm3
Reference Density
0.01 g/mm3
Results
Figure 3 shows the displacement of Node #309 in Y
direction, between OptiStruct and Radioss. Figure 3.
Figure 4 shows the comparison of OptiStruct
and Radioss results for Displacement (deflection) of the
beam at time 1605 seconds. The wire-mesh shows the un-deformed position at time 0
seconds. Figure 4. OptiStruct on the Left;
Radioss on the Right
