AnsweredAssumed Answered

Abnormally high stress values from thermal stress analysis on an engine block

Question asked by Omoni Elekima on Sep 18, 2019
Latest reply on Sep 19, 2019 by Omoni Elekima

I am running thermal stress analysis on an engine block. The goal is to ensure that the block won't fail during use. The bore of the block is subjected to a temperature of 480K. There are water channels inside the block for cooling the block, there are subjected to coefficient convection with convection 3000 W/m^2K and bulk ambient temperature of 360 K. The sides of the block is subjected to convection from air with convection coefficient 5 W/m^2K and bulk ambient temperature of 298 K.The block is fixed at the bolt holes. However the stresses that are being obtained are significantly above yield stress. I want to know how to remedy this. This is because the physical block operates under the given conditions and it has not failed.

 

Please find attached the results.

Outcomes