OS-E: 8020 Twisted Beam

This example demonstrates a twisted cantilever beam using Explicit analysis.

Figure 1. FE Model of Twisted Beam and Loading Conditions

Model Files

Before you begin, copy the file(s) used in this example to your working directory.

Model Description

The beam is constrained in x, y and z directions for translational and rotational motion. The end of the beam has a Force load applied. The analysis is carried out for 2 subcases, one with TTERM 0.002 and the other with TTERM 0.005 and DYREL (Dynamic Relaxation), to avoid having any dynamic oscillations by making it static or quasi-static problem. This analysis is performed using OptiStruct’s Explicit via ANALYSIS = NLEXPL.

The material properties are:
Young's Modulus
29E+06 psi
Poisson's Ratio
7.33E-4 lbf s2/in4


  • Element Stresses

    Figure 2. Element Stresses Contour
  • Displacement

    Figure 3. Displacement Contour