Fatigue Analysis of Diesel Engine Piston

Altair Forum User

Want to do fatigue analysis of diesel engine piston as the part of master's thesis.

 

 

Initially I have tried out a 2D fatigue analysis problem of a mild steel strip and got the results.

 

Then tried to do the fatigue analysis of piston using the same material and same method.

I got good VMS and displacement values for the static sub-case and the pictures are attached.

 

 

 

 

But for the fatigue sub-case didnt give the necessary results.

 

 

and

 

I have followed the same method of 2D problem,PSOLID element is used for the analysis of piston.

(higher order tetrahedron element-10noded element)

Hope the wrong result is caused due to the lack of adjustments in converting a

2D problem to a 3D problem,like the changes needed for defining CARDS etc.

 

Varying pressure with respect to crank angle,for 100 cycles is applied for this fatigue analysis of Piston.

Please Help...

 

Ayyappadas

 

Altair Forum User

Thank you for the great offer.