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Abaqus - MISES stress as output variable

Hi,

 

I am doing a simulation in abaqus where pressure is applied over a rectangular solid model. I requested MISES output from one of the element where the pressure load is applied. My doubt is, " Is that possible to find the possible biggest model size above which the MISES stress will be constant ? ".

 

Boundary conditions are such a way that X and Z coordinates are totally constrained. the load is applied on the y-direction. 

 

My doubt is : say for the model dimension (10*5*10) , i get MISES value for a particular element (say central element) as 240.

Now, I change the model dimension as (12*5*12) and i get different MISES value for the above same particular element as 242. 

My question is, "Is it true (or) possible ,  that after certain increase in model dimensions, the MISES value would be constant. For example, at model dimension (20*5*20), i get MISES as 250 . and again for further increase in model dimension (21*5*21), i get same MISES as 250. 

 

Is such phenomenon possible , where MISES stress remains constant after a particular model size increment ?

  note: Because, i checked that from manual, the MISES calculation involves sigma (stress) which depends on area

 

 

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