Abstract
The statistical nature of the stress crazing phenomena in polymethyl methacrylate (PMMA) has been investigated. The experiments suggest that the time required for the formation of crazes is an inherent, but statisticaL characteristic of the material itself incorporating a stress depending rate process reflecting to some extent the initial microscopic flaw distribution.
Résumé
On a étudié le caractère statistique des phénomènes de polyfissuration dans le metacrylate de polyméthyle.
Les essais exécutés laissant entendre que le temps nécessaire à la formation de criques multiples est une caracteristique inhérente, encore que statistique, du matériau lui-même. Cette caractéristique comprend un processus évolutif fonction de la contrainte appliquée, qui traduit, dans une certaine mesure, la distribution des défauts microscopiques présents à l'origine.
Zusammenfassung
Es wurde der statistische Charakter der Polyfissuration in Polymethyl-Methacrylat untersucht. Die durchgeführten Versuche deuten darauf hin, daß die fur die Bildung von Poly-Rissen erforderliche Zeit eine dem Material eigene, wenn auch statistische, Eigenschaft ist. Diese Eigenschaft begreift einen spannungsabhängigen Geschwindigkeitsprozeß welcher in einem gewissen Masse die Verteilung der ursprünglichen mikroskopischen Fehlstellen reflektiert.
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Narisawa, I., Kondo, T. Statistical aspects in stress crazing of polymethyl methacrylate. Int J Fract 8, 435–440 (1972). https://doi.org/10.1007/BF00191105
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DOI: https://doi.org/10.1007/BF00191105