Fatigue Analysis of Diesel Engine Piston

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

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.

 

 

post-4480-0-17893600-1374573108_thumb.jp

 

 

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

 

 

post-4480-0-19233200-1374573128_thumb.jp

and

post-4480-0-14131000-1374573214_thumb.jp

 

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

 

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