Hi Ashnish,

Thanks for the suggestion. That does not help. The reason is that preintegrated shell element does not have a thickness defined and therefore stresses cannot be calculated. They must be manually calculated from the stress resultants N11, N22, N12, M11, M22, M12, Q13, and Q23 that are in SHELL181 output data. Those can be recovered using ETABLE or ESOL and Item SMISC sequence number 1 through 8. I will edit this once I have done this succesfully so that someone with similar problem can learn from this.