A computer Based System for the Design and Fabrication of Tensegrity Structures

Abstract

Tensegrity structures are composed of tension compression components , where the compression components (bars) are discontinu-ously enclosed within continuous tensile components (cables). From an engineering point of view, a tensegrity structure is characterized by geometric non-linearity and large displacements under loading. Therefore, its prestressed shape and deformation under loading are the result of the combined effect of the geometric parameters that determine the initial configuration of the structure, the level of pre-stress applied to cables, and the material properties of the component members of the structure. A method for generating the initial geometric configuration of tensegrity structures composed of tenseg-rity units and a parametric expression of this geometry have already been developed (Liapi 2001; Liapi and Kim 2004). A novel technology that makes possible the construction of tensegrity structures from the on-site assembly of deployable tensegrity units, which are furnished with a simple mechanism that permits bar-elongation, and, as a result, an increase of the prestress applied to the cables of each unit, is also under development (Liapi 2002a). Also under development