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Slow crack growth in polyethylene ‐ a review
Author(s) -
Brown Norman,
Lu Xici,
Huang YanLing,
Qian Ruzheng
Publication year - 1991
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19910410107
Subject(s) - materials science , stress intensity factor , fracture (geology) , polyethylene , stress field , growth rate , stress (linguistics) , composite material , crack closure , variable (mathematics) , fracture mechanics , mechanics , thermodynamics , mathematics , geometry , physics , mathematical analysis , linguistics , philosophy , finite element method
Slow crack growth in a wide variety of polyethylenes have been investigated. The quantitative relationship between: (1) the external variables such as stress, temperature, stress intensity and J‐integral; (2) the morphological variable such as density and crystal size and (3) molecular variables such as molecular weight, branch density and branch distribution and the rate and time to failure for slow crack growth will be presented. The kinetics of slow crack growth is correlated with the microstructural changes. A fundamental description of slow crack growth is given in terms of tie molecules and the stress field on the boundary of the craze from which fracture initiates.