2. MODELING

CHAPTER 2 "MODELLING" 77 In the left grid you can see the local axes for the first element. According to the above, and since the local Z is inward, the second surface will be produced on the outside, which is not what we want. With the Change Face tool we change the overall times of the elements of this subgroup. In the right grid the local Z is outwards so the second surface will be created correctly inwards. OBSERVATION: It is therefore very important to set the times correctly before creating the mathematical model, because changing times after the mathematical model is created is NOT allowed (the analysis does not run). After the change of direction on the first surface, the following situation arises