Jump to content
Sign in to follow this  
WolfLuca

very low safetyfactor in a small point of modell (not very normal)

Recommended Posts

Hey guys,

 

i really need help, because i made a part for my bachelorthesis and let it calculate in Inspire becuase i had to do a Topologieoptimization. My Part should work without any problems, because i use the same material as the parts that are already used. the whole model shows very low stresss and just in the fixation point there are some very big tension peaks which are putting my safetyfactor low.

 

for me it looks very strange and seriously it shoul work, because my part is at the fixation bigger then the ones i will replace and at the rest of my optimized part is very low in tension.

 

i uploaded the pictures for more clarity.

 

I don't know whats wrong... Please help :(

 

(the secon one is just with a smaller elemtsize)

2.JPG

1.JPG

Share this post


Link to post
Share on other sites

Hi,

 

from 2.4.5 Loads and Boundary Conditions ( Kuang-Hua Chang, in Product Performance Evaluation with CAD/CAE, 2013 )

Quote

In many cases, the components being modeled are assembled to other parts through bolts, pins, and so on. Very often these connectors link the structure to other components that are constrained physically. These constrained components are seldom modeled. It may not always be a good idea to constrain the nodes on the inner surface of the holes where pins or bolts are located, since they are not constrained physically. Unexpected stress concentration often appears around the hole where displacement constraints are placed.

 

WolfLuca likes this

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
You are posting as a guest. If you have an account, please sign in.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...