6533b838fe1ef96bd12a3a06

RESEARCH PRODUCT

Debonding failure mechanisms in prestressed CFRP/epoxy/concrete connections

Julien MichelsEdmunds ZileEdmunds ZileChristoph CzaderskiMasoud MotavalliMasoud Motavalli

subject

Test seriesMaterials sciencebusiness.industryMechanical EngineeringDelaminationFracture mechanicsEpoxyStructural engineeringSTRIPSFinite element methodlaw.inventionMechanics of Materialslawvisual_artvisual_art.visual_art_mediumGeneral Materials ScienceComposite materialbusinessFailure mode and effects analysis

description

Abstract This paper presents an investigation on the failure mode in prestress force-release tests of CFRP strips bonded to concrete substrates. Background of the study is the gradient anchorage technique. Firstly, experimental test series are presented. It is shown that considerable differences in failure mechanisms between lap-shear and the before mentioned release tests exist. The study reveals a strong Mode I-influence in the debonding process, compared to a Mode II for lap-shear tests. Secondly, FE simulations with a commercially available software are introduced. It is demonstrated that delamination in a force-release test occurs by a mixed-mode failure over the strip width.

yearjournalcountryeditionlanguage
2014-12-01Engineering Fracture Mechanics
https://doi.org/10.1016/j.engfracmech.2014.10.012