Eliminate stress concentration in ANSYS 13

[pietero]

hi, i'm using ansys 13 and try to see stress distribution on human teeth. But i have very high stress value at the surface which I'm applied the load. can someone help me how to avoid the stress concentration in my work? Thanks

 

[rb1957]

don't apply a point load ... distribute it over an area

 

[pietero]

I have applied distribution load on area, but the stress concentration still occur on that area.

 

[rb1957]

if you're applying the load in a realistic manner, then why do you think you're getting unrealistic results ?

if the stress peak is going beyond the yield of the material ('cause you're using a linear stress analysis) then use non-linear.

 

[IceBreakerSours]

You have not said much about the problem so I'll just take another guess: Are there multiple material definitions (e.g., cancellous and cortical bone) in your model? If so, does the "stress concentration" occur at the "material" boundary?

http://www.eng-tips.com/faqs.cfm?fid=376

http://www.eng-tips.com/faqs.cfm?fid=1083

 

[pietero]

yes, i am using multiple material definitions.. the stress concentration is not occur at material boundary...

 

[rb1957]

another guess ... are you sure the mesh is continuous ?

give us a pic, tell us why you think the stress peak is unrealistic ...

 

[Twoballcane]

What does your hand calculations match your FEA?

Tobalcane
"If you avoid failure, you also avoid success."
“Luck is where preparation meets opportunity”
"People get promoted when they provide value and when they build great relationships"

 

[marche]

could try applying the load through a series of springs which have a stiffness value say half the depth of the teeth