Fatigue dissipation and failure in unidirectional and angle-ply glass fibre/carbon fibre hybrid laminates
2002 (English)In: Key Engineering Materials, ISSN 1013-9826, Vol. 221-2, 35-48 p.Article in journal (Refereed) Published
The tensile fatigue behaviour of unidirectional 0degrees, [+/-10](4S) and [+/-45](4S) carbon fibre/glass fibre hybrid composite has been investigated. The dissipation was measured by the stiffness, hysteresis loss and temperature field of the specimen surface in an insulated testing chamber. The hysteresis loss correlates well with the increase temperature. Microscopic studies show frictional sliding of longitudinal crack faces between carbon and glass fibre bundles to be the main source of dissipation for on-axis specimens. With increasing off-axis angle the primary loss mechanism became cyclic shear deformation of the polymer matrix. With a finer dispersion of the constituents of the hybrid, the growth of these longitudinal cracks or of zones of inelastic matrix shear deformation. would be suppressed, which would result in a more fatigue resistant material. A localisation of heat generation sets in just prior to final failure. Damage and heat localisation lead to impending failure. If the parameters that control localisation were better understood, it would be possible to improve the fatigue resistance of the material by sensible microstructural design.
Place, publisher, year, edition, pages
2002. Vol. 221-2, 35-48 p.
angle-ply laminates, fatigue, heat dissipation, hybrid composites, infrared thermography, localisation, composites, behavior, mechanisms, strength, tensile
IdentifiersURN: urn:nbn:se:kth:diva-21560ISI: 000175746000004OAI: oai:DiVA.org:kth-21560DiVA: diva2:340258
QC 201005252010-08-102010-08-10Bibliographically approved