Analyzing the Part

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COSMOSXpress prepares the model for analysis and then it calculates displacements, strains, and stresses.

When the existing results do not belong to the current geometry, material, restraints, or loads, an Update button appears in the lower left corner of the COSMOSXpress window. Click Update to re-analyze the model and calculate the new results.

To analyze the part:

  1. Read the displayed information and click Next.

  2. Select:

  3. Click Next.

    If you choose to change the default settings, type in the desired values, or drag the slider. The default tolerance is 5% of the specified element size. Click Next.

For a more accurate solution, drag the slider towards the right (finer). For a quick estimate, drag the slider to the left (coarser).

  1. Click Run.

    When analysis is completed, a check mark appears on the Analyze tab, and the Results tab appears.

Automatic Mesh Trials

COSMOSXpress automatically tries to mesh the model using 3 different element sizes before reporting a mesh failure. If meshing using the specified element size (E) fails, COSMOSXpress tries to mesh the part using an element size of (0.80*E) in the second trial, and (0.64*E) in the third trial.

Mesh Failure Diagnostics

The meshing of a solid model consists of two basic phases. In the first phase, the mesher places nodes on the boundary. This phase is called surface meshing. If the first phase is successful, the mesher starts the second phase where it creates nodes in the inside, fills the volume with tetrahedral elements, and places mid-side nodes on edges.

Failure can occur in any of the two phases. When the meshing of a part fails, COSMOSXpress opens the mesh failure diagnostics tool to help you locate and resolve meshing problems. The tool lists the faces and edges that caused the failure. To highlight a face or an edge that failed to mesh, select it from the list.

COSMOSWorks provides additional tools to deal with mesh failure.

What More Can I Do With COSMOSWorks?

In COSMOSWorks, you could do the following:

  • Specify different element sizes in different areas (mesh control) of the model. With this feature, you can specify smaller element sizes at important locations of your model to improve the accuracy of the results.

  • Choose from three different solvers to analyze different types and sizes of problems more efficiently.

  • Import loads from COSMOSMotion without having to specify restraints.

  • Use adaptive methods to automatically improve the accuracy of the solution for stress analysis.

 

 

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