Issue 51

E. Mousavian et alii, Frattura ed Integrità Strutturale, 51 (2020) 336-355; DOI: 10.3221/IGF-ESIS.51.25 348 depending on which projection is longer (Fig. 13b); then, line L is divided to the given number of locks (Figs. 13c and 13d). Figure 11 : Curved interface j within the hemispherical dome which is part of a cone. (a) (b) Figure 12 : An abstracted interface for a block of the hemispherical dome and all the geometric properties involved in structural stability. The designer can adjust all these properties parametrically. Knowing the length of L , the width of a lock g equals L / m , where m is the number of locks and L is obtained as follows:     max cos ζ φ , cosφ L d p   (25) where sin ζ d a  ; 3 θ 2 d a p R         ; 3 ζ arctan θ tan 2 d a p a         ; 3 θ θ 2arctan(tan sin ) 2 d         . Parameters a , α, R and  3 d are depicted in Fig. 12.