6533b7d1fe1ef96bd125d746
RESEARCH PRODUCT
Tensile behaviour of patch-repaired CFRP laminates
Donald HearnXiaojing GongShahram AivazzadehPengcheng Chengsubject
Materials sciencebusiness.industryeducationComposite numberPlate fracture02 engineering and technologyStructural engineering[PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph]021001 nanoscience & nanotechnologyFinite element methodHigh stressTransverse plane020303 mechanical engineering & transports0203 mechanical engineeringUltimate tensile strengthCeramics and CompositesComposite material0210 nano-technologybusinessCivil and Structural Engineeringdescription
The present study examines the tensile behaviour of composite structures repaired by bonding external patches. Various patches of different stacking sequences placed on both sides of the parent plate were considered. Damage development and the failure process of the repaired plates were analyzed and a parent plate fracture model has been proposed. Optimised patch repairs were calculated by finite element modelling. It was found that high stress concentration along the longitudinal edges of circular patches and/or at the transverse edges of the hole leads to early damage initiation in the parent plate. However, the position of damage initiation and the process of damage progression depend particularly on the properties of repair patches. In order to optimise patch repairs, finite element modelling was used and it was founded possible to attain over 90% of the strength of an unnotched specimen. The optimised patch design can be characterised by an optimal strength ratio R*, which should be minimized when selecting repair parameters.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 | Composite Structures |