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The main criteria for assessing the load-bearing behaviour and risk
potential of monolithic glass are its fragmentation and the
morphology of the fragments. These depend strongly non-linearly on
the strain energy density present in the glass at the time of
fracture, which can be converted into fracture energy. Thus, the
design and optimization of structural glazing in engineering
requires both knowledge of the relevant parameters and mechanisms
during the fracture process in glass and an understanding of the
characteristics of the fracture structure. Based on fracture
mechanics considerations and comprehensive experimental
investigations, various aspects and physical quantities of fracture
behaviour as well as characteristics and parameters of fracture
pattern morphology of fragmented, tempered soda-lime glass were
studied and correlated with the stored strain energy. The
relationship between fragmentation behavior and strain energy was
elaborated using the energy criterion in Linear Elastic Fracture
Mechanics (LEFM) related to the initial strain energy before
fragmentation and in the post-fracture state. Furthermore, a
machine learning inspired approach for the prediction of 2D
macro-scale fragmentation of tempered glass was developed and
elaborated based on fracture mechanics considerations and
statistical analysis of the fracture pattern morphology. A method
was deduced and applied in which the fracture pattern of tempered
glass is predicted and simulated by Voronoi tessellation of point
patterns based on Bayesian spatial point statistics fed with energy
conditions in LEFM.
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