In this textbook, the ﬁnite element method (FEM) is used as a tool to solve practical problems. For the most part, commercial packages, mainly Abaqus, are used in the examples. Computer programming is limited to implementing material models and post processing algorithms. When commercial codes lack needed features, other codes are used, which are provided in . A basic understanding of the ﬁnite element method is necessary for eﬀective use of any ﬁnite element software. Therefore, this chapter contains a brief introduction intended for those readers who have not had a formal course or prior knowledge about the ﬁnite element method. Furthermore, an introduction to the Abaqus/CAE graphical user interface (GUI) is presented to familiarize the reader with the typical procedures used for ﬁnite element modeling using any commercial software.