Issue 22

S. Bennati et alii, Frattura ed Integrità Strutturale, 22 (2012) 39-55 ; DOI: 10.3221/IGF-ESIS.22.06 49 Figure 8 : Determination of c u . a) b) c) d) Figure 9 : Transverse displacement v ( z ): a) stage 1: 0 M M  ; b) stage 2: 0.9  u M M ; c) stage 3: 1.01  u M M ; d) stage 4: 1.01  u M M . Fig. 10 shows a plot of the interfacial relative displacement,  w , and tangential stress,  , as functions of the abscissa, z , for three values of the applied couple, M , corresponding to the first three stages of behaviour described in the previous section. As can be observed, as M increases, the relative displacement in the end section of the reinforcement increases: