1D meshing

1D Mesh lets you create a mesh of one-dimensional elements that are associated with geometry. You can create or edit one-dimensional elements along curves or polygon edges.

One-dimensional elements are two-node elements that, depending on type, may or may not require an orientation component. A one-dimensional element is one in which the properties of the element are defined along a line or curve. Typical applications for the 1D element include beams, stiffeners, and truss structures.

Choosing a 1D meshing tool

The software provides several tools for creating and defining 1D elements, depending on the problem you are modeling:

• Use 1D Mesh to define a mesh along geometry, for example, to create a beam model. You can also use the Mesh Coat option in the 1D Mesh dialog box to create a coating of linear 1D elements along the edges of selected 2D or 3D elements.

• Use 1D Connection to connect discrete meshes or geometry using 1D elements (for example, to create a spider mesh). See 1D Connection for more information.

• Use Spot Weld to create a 1D connection mesh by projecting a curve or points between two faces. See Creating a series of spot weld connections for more information.

You can also create 1D elements manually to create beam models not associated with any geometry. See Manually creating elements.

Ensuring that 1D elements are oriented consistently

When you use the 1D Mesh command to create beam elements on selected edges or curves, the directions of those edges or curves control the orientation of the beam elements. If the directions of the edges or curves are not consistent, the orientations of the resulting beam elements will not be consistent. For more information, see Ensuring consistent 1D element orientation during mesh creation.

Defining cross section shapes for 1D elements

You can use the 1D Element Section command to create cross sections and assign them to a mesh of 1D bar or beam elements. For more information, see Creating beam cross sections and Create a standard cross section.

Defining end releases for Nastran, ANSYS, LS-DYNA or Simcenter Samcef beam elements

When using Nastran, ANSYS, LS-DYNA, or Simcenter Samcef as your solver, you can define a release at the ends of beam and bar elements to model hinged or pinned connections. End releases remove connections between a node and selected degrees of freedom. For more information, see End releases for 1D elements.

1D Meshes for lattice bodies

When you create a FEM file from a CAD convergent body that contains lattice structures, the software automatically creates a 1D mesh on the lattice. For each rod in the lattice, the software creates a 1D element and then connects those elements as appropriate. For more information, see 1D meshes for lattice bodies.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM file as the work part and displayed part
Command Finder	1D Mesh

Quick links

Command reference

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1D meshing, Simcenter 3D 2021.1 Series

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