# Ready for a challenge?

## How good are you in FEA? Take a test to find out!

This is not meant as one of those horrible school tests.

This one is all about you getting to know yourself…

`It will take you around 2-3 minutes.`

## Test your FEA skills! How much do you know about FEA?

I've prepared a few questions for you! If you are quick it will take you around 2-3 minutes.

## 1. L-section dilemma!

This is a simple piece of L-section. One end is fixed, while the other is loaded as you can see below. What is the correct von Mises stress distribution?

## 2. Symmetry problem

You have this nice compressed element. Can you use symmetry through the middle in the analysis?

## 3. Load on a cylinder

You are testing a cylinder in a hydraulic press. If it is uniformly supported at the bottom (as below) it doesn't matter if you use load or enforced deformations in your linear FEA model - the stress distribution will be correct. What if the cylinder would be supported on 4 small supports instead of entire circumference?

## 4. Bolt modeling

When it is reasonable to model a bolt as a beam connected with RBE2 elements to the circumference of the opening in a plate assuming you are interested in stress distribution in the pleat near the bolt?

## 5. Mesh size

You used 3 mesh sizes A, B and C and you read stress for each of them. You want to have an outcome within 10 MPa accuracy. Which mesh size should you use?

## 6. Mesh size

You analyzed the same problem with more element sizes. Which mesh size shuld you choose for 10 MPa accuracy?

## 7. QUAD4 vs QUAD8

Which mesh produce more accurate outcomes in complex cases: QUAD8 elements or 4xQUAD4 elements instead of each QUAD8 element?

## 8. When it fails?

This is a very simple element made from steel loaded from the top. Which von Mises stress distribution from linear analysis corresponds to the plastic capacity failure of this element? (red color indicates stress above yield limit of 235 MPa)

## 9. What kind of support is that?

This rectangle simply stands on the ground (it is not attached). You can see the loads below. What boundary conditions would you apply at the bottom edge?