Issue 50

E. D. Pasiou, Frattura ed Integrità Strutturale, 50 (2019) 560-572; DOI: 10.3221/IGF-ESIS.50.47

It is recalled that the specimens studied here are made of three completely different materials (anisotropic brittle marble mortar-isotropic ductile titanium) and also three material interfaces exist, i.e., between the connector and mortar, between mortar and marble, and between the two marble blocks. Therefore, the two wave velocities considered definitely improved the determination of the location of the damage. Having determined the location of the damage and taking, also, into account the time instant at which the damage occurs, monitoring the real time damage evolution becomes feasible. Typical images of the damage evolution are presented in Fig.7 for a typical specimen of Group B of the main experimental protocol.

Figure 7 : (a) The sub-volumes of a typical specimen of Group B; (b) The spatiotemporal distribution of the acoustic events in the sub volumes. The colours of the events correspond to the respective coloured sub-volume.

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