1983/01/01 by Exner, Gerhard
Engineering · Materials Science · #660 #Glass properties and applications #Material Science and Thermodynamics #Structural Analysis of Composite Materials
paper · doi:10.34657/17517
openalex publication_date 1983/01/01 · openalex created_date 2016/09/30 · openalex updated_date 2026/07/01
The strength of glasses and glass ceramics is not an intrinsic property like density but depends especially on the mechanical condition of and tensile stress present in the surface, the maximum permissible probability of fracture, the time distribution of loading particularly the duration of the effective tensile stress, and the surrounding medium. A concept is proposed for dealing with the problem of evaluating the strength of intermittently loaded structural glass components. Whilst surface quality in relation to strength requires at least one of a series of measurements in the laboratory, factors for the area, the probability of failure and the effect of time could be defined. Equations that permit this are reported and are valid for the Weibull model with two parameters. An example is given to provide a detailed explanation of the foregoing; diagrams make the assumptions clear. The theoretical basis is being referred to in full so that the limits of application are able to be evaluated.