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Toughening of thermosets by the creation of residual compressive stresses
Author(s) -
Kim Ho Sung,
Kim Nam Ho
Publication year - 2006
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.23235
Subject(s) - toughening , materials science , thermosetting polymer , composite material , compressive strength , residual stress , residual , fracture (geology) , toughness , mathematics , algorithm
The toughening of thermosets through the creation of residual compressive stresses around microspheres was studied. Expandable, hollow microspheres containing gas with heating were used for the creation of residual compressive stresses. Microscopic compressive residual stresses in the vicinity of the crack tip were graphically analyzed and related to the macroscopic mechanical behavior for mode I fracture. The graphical analysis and experimental results confirmed that toughening was achieved mainly because of residual compressive stresses rather than a postcure effect. As expected, however, no toughening effect was found in mode III fracture. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 4045–4051, 2006