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Smart Structures and Systems
  Volume 23, Number 4, April 2019 , pages 373-385

Energy and strength in brittle materials
Emanuela Speranzini

     A study concerning the strength of brittle materials is presented in this paper. The failure behavior was investigated examining the plane of the crack after the failure and comparing the results obtained with those deriving from the fracture mechanics theory. Although the proposed methods are valid in general for brittle materials, the experiment was performed on glass because the results are more significant for this. Glass elements of various sizes and different edge finishes were subjected to bending tests until collapsing. The bending results were studied in terms of failure load and energy dissipation, and the fracture surfaces were examined by means of microscopic analysis, in which the depth of the flaw and the mirror radius of the fracture were measured and the strength was calculated. These results agreed with those obtained from the fracture mechanics analysis.
Key Words
     brittle material; energy; strength; structural glass; ceramic
Emanuela Speranzini: Department of Engineering, University of Perugia, via G, Duranti n.93, 06125 Perugia, Italy

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