PSI - Issue 26

Jesús Toribio et al. / Procedia Structural Integrity 26 (2020) 376–382 Toribio / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 1. Statue of Fray Luis de León (Headquarters of the University of Salamanca).

Fig. 2. Fracture profile (notched sample of slightly cold drawn pearlitic steel).

Fig. 3. Monument Valley.

4. Music and fracture mechanics Previous research by Toribio and Ovejero (1997, 1998a, 1998b, 1998c) on the microstructural evolution of cold drawn pearlitic steels during manufacturing (cold drawing) demonstrate the progressive slenderizing and orientation (in the wire axis or cold drawing direction) of the pearlitic colonies (first microstructural level), as well as increasing orientation and densification of the ferrite/cementite lamellae (second microstructural level) linked with a decrease of pearlite (ferrite/cementite) interlamellar spacing. Thus the microstructure of the cold drawn pearlitic steel wires becomes progressively oriented as the cold drawing degree increases. On the basis of the hierarchical microstructure of cold drawn pearlitic steels (two levels of colonies and lamellae), a link can be established between the material microstructure and the multi-scale ( multi-level or multi layer ) structure of Johann Sebastian Bach’s music. Fig. 4 shows the Bach’s image by Elias Gottlob Haussmann, the only authentic portrait of Johann Sebastian Bach (that in which the composer has the canon triplex in his hands). In this framework, one really remarkable example is the Christmas Oratorio composed by six Cantatas (macro structure), each of them with its own micro-structure (consisting of contrasting sections of recitatives, arias and