FEA Analysis Procedure

8/8/2019 FEA Analysis Procedure

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FEA analysis procedure



Get the geometrical model (Iges or step format)

Choose solver interface in Hypermesh like Ansys/Ls-dyna/Nastran

Update the solver template in HM

Import the geometry file into Hypermesh I f i t i s s i mpl e beam model, i t can b e appr oxi mat ed us ing 1-D

elements and nodes (Need to assign Mat properties and Cross

section and other properties if any.

If shell or BIW type components,Mid surface to be extracted. Go

to Geom panel select midsurface sub panel and extract. Extracting

mid surface in plastic components is tedoius,need to rework on midsurface. After meshing assign thickness and mat properties and set

boundary conditions.

For example in a Cantilever beam constrain all DOF at the fixed

end. If it is roller supported leave one DOF for translation.If hinge

connected leave one rotating DOF.

If the components have solid intricacies like engine block or

castings, need to go for solid mesh. As approximation of geometry

is highly difficult.

Contact non linearity can be defined using 2D and 3D contact

elements.Eg-Gears or other power transmission coponents.



Understand the problem and define boundary conditions correctly export

the pre processed job to solver.

Import the FE-model into selected solver Ansys/Nastran recheck the allBCs and fire the job.

Solution time depends on number of elements and type of

problem(Contacts,Modal etc)

Export the results. If it linear static analysis, need to check Vonmises

stress, shear stress, stress intensity and distribution, deformations.

If Non linear(Material) ,need to check the principal stresses deflectionsand strain.

If transient analysis need report the all above things with varying time.

In modal analysis need to report Natural frequency and deflections for the

frequency

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FEA Analysis Procedure