Debasis,

Poisson ratio has nothing to do with this particular problem but in general , as you know Posson ratio is a part of stiffness matrix and there can be difference between the results of hand calc. and computerized calc. between because of difference in values of this parameter.

Anyway, coming to the problem in hand, I still hold my answer and believe that is the case.

Why don't you do a comparison of the results of this problem using standard FE Programmes like ANSYS, ABAQUS , SAP IV etc and check for the variance? I am sure that it will be an interesting study.

For any problem , between any two FE code variance ( linear elastic analysis only) is 5-10% ( my own experience and some of the papers I read),14% in my opinion is not that much of a big number.

Also, pl. remember that a widely reputed software like CAESAR II has to undergo lot of benchmark tests and QA and only then it is marketted.

Also. pl. work out the way as advised by Shr and Richard and let us know your finding.

Regards