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A relationship between the fracture mechanics and surface energetics failure criteria
Author(s) -
Kaelble D. H.
Publication year - 1974
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1974.070180622
Subject(s) - energetics , fracture mechanics , fracture (geology) , materials science , mechanics , surface (topology) , forensic engineering , composite material , engineering , thermodynamics , physics , mathematics , geometry
The reversible part of the fracture mechanics (F‐M) fracture energy γ c is redefined in terms of current theory for surface energetics (S‐E) interactions at regular interfaces. These new failure criteria are applied to the definition of surface energy criteria for spontaneous interfacial failure, where γ c = 0, produced by selected conditions of liquid‐phase immersion. For cases where γ c > 0, the total fracture energy W = γ c + W p , where the irreversible plastic work of surface formation W p ≈ W ≫ γ c . A qualitative relation between γ c 1/2 ∝ W p is observed for the case of steady‐state crack propagation in peeling. For adsorption bonds, the theory provides a new method of mapping the surface energy effects of the immersion phase upon the Griffith fracture energy γ c . Essential factors which determine water sensitivity of interfacial bonds are incorporated into the analysis and experimentally verified.