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Influence of the notch‐sharpening technique on styrene–acrylonitrile fracture behavior
Author(s) -
Martínez A. B.,
Salazar A.,
León N.,
Illescas S.,
Rodríguez J.
Publication year - 2016
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.43775
Subject(s) - sharpening , materials science , fracture (geology) , composite material , acrylonitrile , displacement (psychology) , acrylonitrile butadiene styrene , copolymer , polymer , mechanical engineering , engineering , psychology , psychotherapist
The Centre Català del Plàstic and Universidad Rey Juan Carlos laboratories joined forces to investigate the effect of the notch‐sharpening technique on the fracture parameters of styrene–acrylonitrile. Contact notch‐sharpening techniques, such as razor tapping, razor sliding, and razor broaching, and a noncontact procedure, femtolaser, were analyzed. The fracture values of the samples with notches sharpened via contact techniques were divided into two groups: one with pop‐in and the other with no pop‐in in the load–displacement records; this resulted in the lowest and highest fracture toughnesses, respectively. The fracture parameters of the specimens with notches sharpened via a femtolaser were between those of the samples with notches sharpened via contact procedures in which pop‐in occurred and those in which it did not. To explain these results, the crack front of the nontested specimens after sharpening was investigated in depth, we identified the type of damage and measured its size and the crack tip radii. The morphology of the crack front was related to the fractographic study. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43775.