topic Re: event simulation help in Fusion Support Forum

event simulation help

Anonymous — Mon, 31 Jul 2017 06:21:26 GMT

I have a trouble getting the FEA result I want. I expected the frame to be bent to the same direction of the load. However, stress is very tiny and some parts of the model is pushed out of space. File is attached below.

Re: event simulation help

ahreum.ryu — Mon, 31 Jul 2017 09:30:56 GMT

Hi @Anonymous

Thank you for posting.

I'm running on your model but it takes time...

before checking the result, I'm not sure it but I suspect 2 things.

1. The load step

you gave the load step but in your result, you didn't move the steps to the peak load.

2. Contact information

Component 93 doens't have the contact. it's showed "No contact" so I think that's why the part pushed out of space.

Would you mind takting a look at that? In the meantime I will take a look at your model with result and then I will get back to you.

Many thanks,

Ahreum.

Re: event simulation help

Anonymous — Tue, 01 Aug 2017 02:29:54 GMT

Hi Ahreum.

I fix the contact for component 93 and I'm still getting similar result. Now, my maximum stress is zero for every load steps. Have you manage to run the simulation yet? I'll attach a file that I made some changes to the previous one.

Re: event simulation help

ahreum.ryu — Tue, 01 Aug 2017 10:10:52 GMT

Hi @Anonymous,

It takes the time to solve with your model, so I created a simple model so that it will be easier to find out what was the issue.

You just use the contact option with all "separation". In that case, During running, the model was separated.

So I changed the contact option to the Bonded, and this is the results.

However, we should consider about an analysis type. Do you want to try a kind of an impact analysis? And see the broken view??

This is a description about the analysis type it will help to understand.

Event Simulation:^{1, 2} This simulation type expands capabilities beyond nonlinear static stress analysis by adding support for the following characteristics:

Velocity and damping as well as mass and acceleration (inertial effects) are considered for true time-dependent, dynamic event simulation (such as impact analyses).
Load curves control the magnitude of applied loads and prescribed displacements as a function of time.
Load increments are not arbitrary divisions of a static load or displacement. Instead, they define structural conditions at actual instantaneous time points during the simulated event. Results are calculated and output at each incremental point in time.

Nonlinear Static Stress:^{1, 2} This simulation type expands capabilities beyond static stress analysis by adding support for the following characteristics:

Large deformation and motion
Changes in contact during the simulated event
Changes in loads or boundary conditions during the simulated event
Nonlinear material behavior (such as changes in material stiffness and permanent deformation, both of which occur when the material is stressed beyond the yield strength)
Multiple calculation increments are performed as the loads are gradually applied (ramped up)

One more thing, there are many components with the same materials. If you don't consider about bolts, it will be easier to combine with the same materials.

Could you take a look at your contact information?

Many thanks,

Ahreum.