PSI - Issue 37

Jesús Toribio et al. / Procedia Structural Integrity 37 (2022) 977–984 Jesús Toribio / Procedia Structural Integrity 00 (2021) 000 – 000

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1. Introduction Previous research by the author (Toribio, 2020a) was directed towards a new concept of structural integrity, and broadening the amplitude of its definition (Toribio, 2021), with a multi-scale approach to include all length scales in the theoretical framework of the new terms of giga -, mega- , macro -, micro- and nano- structural integrity. This paper formulates more steps towards a more innovative concept of structural integrity, by extending the basic concept to both material and non-material issues, as well as to other fields such as the psychology of human behaviour and conduct. 2. Brief History of Fracture & Structural Integrity As explained in previous papers (Toribio, 2020a, 2021), in Europe the European Group on Fracture (EGF, 1987) evolved (EGF, 1989) towards the newer concept of structural integrity (EGF, 1990). The leaders of this successful process were Professor Dominique Francois and Professor Keith Miller, as described by Francois (1996). The International Congress on Fracture (ICF) was founded by Takeo Yokobori in 1965 (Taplin and Saxena, 2011). A new global brand descriptor of the ICF society was proposed as ICF- WASI: “ The International Congress on Fracture: The World Aca demy of Structural Integrity” (Carpinteri et al., 2011; ICF13, 2013). 3. Fracture & Structural Integrity: A Multi-Scale Approach 3.1. Giga-Structural Integrity This term refers to any phenomenon affecting the integrity of the Earth itself, e.g., plate tectonics and relative displacement of two blocks, with a real giga-crack in mode II (Fig. 1), cf. Toribio (2021).

Fig. 1. Giga-structural integrity applied to plate tectonics.

3.2. Mega-Structural Integrity The term mega-structural integrity is coined to avoid the collapse or failure of real engineering (mega)structures, like bridges, cf. Fig. 2 with the beautiful and magnificent Puente del Pedrido ( Pedrido bridge ) designed by the prominent Spanish civil engineer Eduardo Torroja, so that this section of the paper is a heartfelt tribute to him.

Fig. 2. Puente del Pedrido ( Pedrido bridge ) in La Coruña (Galicia, Spain), designed by the prominent Spanish civil engineer Eduardo Torroja.