DEPENDENCE OF INTRALAMINAR FRACTURE-TOUGHNESS ON DIRECTION OF CRACK-PROPAGATION IN UNIDIRECTIONAL COMPOSITES

Authors
HANSEN U GILLESPIE JW
Citation
U. Hansen et Jw. Gillespie, DEPENDENCE OF INTRALAMINAR FRACTURE-TOUGHNESS ON DIRECTION OF CRACK-PROPAGATION IN UNIDIRECTIONAL COMPOSITES, Journal of composites technology & research, 20(2), 1998, pp. 89-99
Citations number
29
Categorie Soggetti
Materials Sciences, Composites","Polymer Sciences
Journal title
Journal of composites technology & research → ACNP
ISSN journal
08846804
Volume
20
Issue
2
Year of publication
1998
Pages
89 - 99
Database
ISI
SICI code
0884-6804(1998)20:2<89:DOIFOD>2.0.ZU;2-J
Abstract
Mode I intralaminar fracture toughness G(IC) of graphite fiber-reinfor ced bismaleimide (X5260/G40-800) has been studied experimentally using double edge notch (DEN) specimens and three-point-bend specimens. The intralaminar fracture toughness was found to depend significantly on the direction of fracture propagation. Examination of the fracture sur face showed the fracture surface to be relatively smooth or ragged dep ending on the direction of the fracture propagation, thus substantiati ng the measured differences in G(IC). Furthermore the material exhibit ed a substantial R-curve behavior, which appeared related to fiber pul l-out.