Author(s)

L. Sanchez-Cuenca

Abstract

When we want to design expandable structures we not only find many problems. Sometimes it is not possible to design a such structure because there is not geometric coherence in some phases of the expandable process. Then it seems easier not to try to solve the problems of a given form but to seek forms that make possible the expandable process. In the paper we analyse which are these forms in the family of the translational grids. 1 Introduction We can produce expandable structures by more than one way. One of them, the most usual, is the one that consists of "x" arranged struts. This method has two variants: with straight struts or whit not straight but angular struts. The first case (straight struts) is the way F. Escrig has used so many times. The second one (angular struts) is the way C. Hoberman has used for his e

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