December 10, 2022 at 7:46 am

Erik Kostson

Ansys Employee

Hi

These elements would not use as mentioned in the help (beam188) a simple formula – they use numerical integration as mentioned briefly in help.

So very different to this simple matrix found in handbooks – if you want to compare these matrices you would need to use the old legacy beam4 elements that do not use numerical integration but more “ready matrices” like you shown.

Below is a 10 m long beam with a square beam section (1m x 1m) represented by a single beam4 element. The local element matrix is then as extpected per “handbook matrix” found in textbooks

All the best