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RESEARCH PRODUCT

Apparent interfacial shear strength of short-flax-fiber/starch acetate composites

Roberts JoffeBo MadsenJanis AndersonsKalle NättinenJanis Modniks

subject

Interfacial shear strengthMaterials sciencePolymers and PlasticsApparent interfacial shear strengthGeneral Chemical EngineeringComposite numberSheet molding compoundsGreen composites02 engineering and technology010402 general chemistry01 natural sciencesBiomaterialsFlax fiberPlasticizersFlaxYarnUltimate tensile strengthChemical Engineering (all)Composite materialThermoplastic starchchemistry.chemical_classificationFiber volume fractionsFlax fiberElastic perfectly plasticStress–strain curvePlasticizerPolymer021001 nanoscience & nanotechnologyFiber reinforced plasticsReinforcement0104 chemical sciencesFibersStress-strain curvesReinforced plasticsInterfacial shearchemistryShort-fiber-reinforced compositesAdhesiveGreen composite0210 nano-technologyLinen

description

Abstract The paper deals with an indirect industry-friendly method for identification of the interfacial shear strength (IFSS) in a fully bio-based composite. The IFSS of flax fiber/starch acetate is evaluated by a modified Bowyer and Bader method based on an analysis of the stress–strain curve of a short-fiber-reinforced composite in tension. A shear lag model is developed for the tensile stress–strain response of short-fiber-reinforced composites allowing for an elastic-perfectly plastic stress transfer. Composites with different fiber volume fractions and a variable content of plasticizer have been analyzed. The apparent IFSS of flax/starch acetate is within the range of 5.5–20.5 MPa, depending on composition of the material. The IFSS is found to be greater for composites with a higher fiber loading and to decrease with increasing content of plasticizer. The IFSS is equal or greater than the yield strength of the neat polymer, suggesting good adhesion, as expected for the chemically compatible constituents.

yearjournalcountryeditionlanguage
2016-01-01International Journal of Adhesion and Adhesives
https://doi.org/10.1016/j.ijadhadh.2015.10.007