What are the conditions for a problem to be axisymmetric?

NPTEL Online-IIT Kanpur. The problems in which the body possesses an axis of symmetry and the boundary conditions and other parameters of the problem are symmetric with respect to this axis are called as axisymmetric problems. The cylindrical coordinate system is found to be convenient for analyzing such problems.

What is axisymmetric in Abaqus?

Abaqus includes two libraries of solid elements, CAX and CGAX, whose geometry is axisymmetric (bodies of revolution) and which can be subjected to axially symmetric loading conditions. In addition, CGAX elements support torsion loading.

How do you create an axisymmetric model in Abaqus?

Create new axisymmetric part Go to the Part module, select Part à Create and select Axisymmetric as modelling space (Figure 10). The sketch module is now opened. Select the Add Sketch tool (Figure 11) and choose the sketch that was just saved. You now have the option to reposition entities.

What is axisymmetric model?

Axisymmetric modeling allows the user to analyze a 3-D excavation which is rotationally symmetric about an axis. The input is 2-dimensional, but the analysis results apply to the 3-dimensional problem. Note: Because of the symmetry, only “half” of the problem needs to be defined.

How to create an axisymmetric model in Abaqus?

This can easily be done using the Create Datum Axis: 3 points on a circle option. Select three vertices on a circle (so three points that correspond to the same point in the axisymmetric representation), e.g. the ones shown in Figure 3. This axis can be used to create a plane, via the Create Datum Plane: Line and Point option.

How to create a 3D part in Abaqus?

The file name is selected. In the Create Part from STEP file dialog box that appears, the to be created part is given a name, in this case valve_3D (Figure 1). A 3D part is then created, this appears in the model tree (Figure 2). Figure 2: The imported geometry.

How to do a data check in Abaqus?

A data check analysis is performed by using the datacheck parameter in the command for running Abaqus (see Abaqus/Standard and Abaqus/Explicit execution ).

Can a nonaxisymmetric element be used in an axisymmetric model?

First- and second-order elements cannot be used together in the axisymmetric model. Nonaxisymmetric elements such as springs, dashpots, beams, and trusses will be ignored in the model generation. Only surface-based contact pairs can be revolved. Models using general contact cannot be revolved.