ABSTRACT
Generally, displacements and stresses in a structure are changeable into complex forms and become complex functions involving the coordinates (x, y, and z). However, if only focused on a small area in a structure, the displacement and stress within the area can be approximated by a simple function. For example, Fig. 4.1(a) is a phenomenon after cylindrical buckling due to Origami, which became famous in a paper by Hunt and Ario. Fig. 4.1(b) can be obtained using the “finite element method”. Alternatively, as shown in Fig. 4.1(c), approximate analysis can be performed as a truss model that extracts only the uneven part of the buckling deformation. Ultimately, in order to have a computer calculate the mechanical analysis of a structure, a structural model for approximate calculation consisting of nodes and various elements must be considered.
