Incompatible Mode

Incompatible mode is a feature designed  to improve the bending behavior of low order elements. Briefly, by using this feature elements shows a more realistic response under bending moments. As I have focused several times in my video coarse, deep understanding of different features of a software is the most part of any numerical modeling. so first let’s have a closer look at elements

In a 2-D linear plane element, for example,  by formulating an incompatible mode element 2 additional internal degrees of freedom (DOF) are included. These internal DOF will provide a better representation of element response to bending moment. The incompatible mode elements, can easily overcome the shear locking effect of in fully integrated, first-order elements. Moreover, these elements can significantly reduce the times of analysis and improve the results of  in both 2 and 3-D elements under bending