OS-E: 0140 Pretension Analysis of Piston

Convert an Abaqus model to OptiStruct using HyperMesh and SimLab.

Figure 1. FE Model

Model Files

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

Model Description

Nonlinear Static Analysis with large displacement is conducted on this piston assembly, where pretension force is applied on both the sides of the piston bolts (Figure 1).
FE Model
Element Types
The linear material properties are:
Young’s Modulus
2.1E5 MPa
Poisson's Ratio


Using the conversion tool, you will be able to convert this Abaqus FE model successfully and then the displacements and stress results should match with Abaqus closely (Figure 2).

Figure 2. Stress and Displacement Contour in OptiStruct