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
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:
Property
Value
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
