6533b7cffe1ef96bd1257c87
RESEARCH PRODUCT
Experimental Characterization of the Properties of Double-Lap Needled and Hybrid Joints of Carbon/Epoxy Composites
Aleksejs NasibullinsAleksandr K. ArnautovI. BlumbergsViktor GribniakViktor GribniakM. Haukasubject
Materials scienceComposite numberchemistry.chemical_elementmechanical propertieslcsh:TechnologyArticlez-pinsUltimate tensile strengthmedicineGeneral Materials ScienceComposite materiallcsh:MicroscopyReinforcementJoint (geology)lcsh:QC120-168.85lcsh:QH201-278.5hybridlcsh:TStiffnessEpoxycarbon/epoxy compositeShear (sheet metal)carbon/epoxy composite; mechanical properties; joints; z-pins; hybridchemistrylcsh:TA1-2040jointsvisual_artvisual_art.visual_art_mediumlcsh:Descriptive and experimental mechanicslcsh:Electrical engineering. Electronics. Nuclear engineeringmedicine.symptomlcsh:Engineering (General). Civil engineering (General)lcsh:TK1-9971Carbondescription
The effect of through-thickness reinforcement by thin 1 mm steel needles (z-pins) on the static tensile strength of double-lap joints of a carbon/epoxy composite was investigated. Two types of joints—z-pinned and hybrid (including glued ones)—were considered. The joints were reinforced in the overlap region with 9, 25, or 36 z-pins. Comparing mechanical properties of the double-lap joints with the corresponding characteristics of their unpinned counterparts, the z-pins were found to be highly effective: the strength and stiffness of the pinned joints increased up to 300% and 280%, respectively. These improvements were due to a transition in the failure mechanism from debonding of the joint in the absence of z-pins to pullout or shear rupture of z-pins or to the tensile failure of laminate adherends, depending on the volume content of the pins.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-11-11 | Materials |