2-1

Exercise 6 – Creating Solid Meshing

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-2

Exercise 6 – Creating Solid Meshing

Import CAD Geometry

Create Meshing and Solve Solid Model

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-3

Exercise 6 – Creating Solid Meshing

Import CAD Geometry

File, Import Geometry, select

Slot.x_t file

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-4

Exercise 6 – Creating Solid Meshing

Constrain the model

Run Model, Constraint, on Surface

Enter the name for Constraint Set like

Fixed

Select holes inner surfaces

And OK for Fixed

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-5

Exercise 6 – Creating Solid Meshing

Apply the load

Run Model, Load, on Surface

Enter the name for Load Set like Force FX

Select the face inside slot

And apply Force, FX= -1000 N

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-6

Exercise 6 – Creating Solid Meshing

Mesh and evaluate initial model

Run Mesh, Mesh Control, Size on Solid…

Select active solid and OK for options in

Automatic Mesh Sizing

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-7

Exercise 6 – Creating Solid Meshing

Mesh and evaluate initial model

Run Mesh, Geometry, Solids

Define model Material and OK

Then OK for Automesh Solids

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-8

Exercise 6 – Creating Solid Meshing

Solve and evaluate results

Run Model, Analysis

Define Analysis Set and press Analyze

After solution Close NX Nastran Analysis

Monitor

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-9

Exercise 6 – Creating Solid Meshing

Solve and evaluate results

Select Results, 1..NX Nastran Case 1and

choose Contour and find the most stressed

sections, then save a copy of the model using

File,Save As…

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-10

Exercise 6 – Creating Solid Meshing

Evaluate solid

mesh error

Estimate Mesh using

other Output Vectors

In Model, Output,

Process choose Error

Estimate and Add

Operation for the

following vectors

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-11

Exercise 6 – Creating Solid Meshing

Evaluate solid mesh error

Error Estimate Vectors based on elemental stresses shown the same

area which matches the maximal results

Mesh of this area should be checked and refined

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-12

Exercise 6 – Creating Solid Meshing

Tetra Adaptive Meshing and Rerun

From Custom Tools select PostProcessing and Tetra Adaptive Mesh

and Rerun command, then select the solid

Femap automatically identifies the location, re-meshes and reruns the

solution

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-13

Exercise 6 – Creating Solid Meshing

Tetra Adaptive Meshing and Rerun

Check Mesh Error again and resulting max stresses after first adaptive

loop then repeat the adaptive procedure and compare results again.

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-14

Exercise 6 – Creating Solid Meshing

Tetra Adaptive Meshing and Rerun

Check Mesh Error again and resulting max stresses after second

adaptive loop then repeat the adaptive procedure and compare results

again.

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-15

Exercise 6 – Creating Solid Meshing

Tetra Adaptive Meshing and Rerun

Check Mesh Error again and resulting max stresses after third adaptive

loop. Check results difference from the previous solution and if needed

repeat procedure again.

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-16

Exercise 6 – Creating Solid Meshing

Default and adaptive refined mesh comparison

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-17

Exercise 6 – Creating Solid Meshing

Default and adaptive refined mesh error comparison

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-18

Exercise 6 – Creating Solid Meshing

Default and adaptive refined stress comparison