Enforced axial deformations for 1D elements (Nastran)

In the Nastran environment, you can use the 1D Axial Deformation command to apply an enforced axial deformation (in units of length) to CBAR, CBEAM, CONROD, CROD, and CTUBE type elements. Enforced deformations are useful, for example, when you analyze misfit or misalignment conditions in structures.

The 1D Axial Deformation command does not enforce a strain or apply an actual extensional length to the 1D element. Rather, it applies a force to the element that produces the specified extension if that element is free to expand without generating internal forces. The software adds the computed force to the other forces in your model. Since most elements in a model are not free to expand, the extension value that you specify in the 1D Axial Deformation dialog box may not be achieved.

The 1D Axial Deformation command corresponds to the Nastran DEFORM bulk data entry.

For more information, see:

• Axial 1D Element Deformation dialog box (Nastran)

• DEFORM in the Simcenter Nastran Quick Reference Guide

• Enforced Element Deformation Loads in the Simcenter Nastran User’s Guide

Supported solution sequences

The DEFORM entry is applicable in linear statics, inertia relief, differential stiffness, and buckling analyses. Therefore, you can use the 1D Axial Deformation command in solutions 101, 105, and 200 in Pre/Post.

Axial deformation load example

The following graphic shows an example of an axial deformation load. (A) shows the 1D Axial Deformation load that was defined on each of the 1D bar elements.

(B) shows the nodal displacement results. Notice the deformation that occurs at the bar element locations.

Where do I find it?

Application	Pre/Post
Prerequisite	A Simulation file as the work part and displayed part and an active solutionSimcenter Nastran or MSC Nastran as the specified solver
Command Finder	1D Axial Deformation

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Enforced axial deformations for 1D elements (Nastran), Simcenter 3D 2021.1 Series

© 2020 Siemens

window.mainLanguage="en_US"

window.delivId=""

window.projectId=""

MathJax.Hub.Config({ TeX: { extensions: ["autoload-all.js"] }, tex2jax: { displayMath: [ ] }, "SVG": { scale: 125 } });