0000000000054480

AUTHOR

Merja Sippola

showing 2 related works from this author

Predicting stiffness and strength of birch pulp:Polylactic acid composites

2016

This paper studies failure of birch pulp–polylactic acid composites. Stiffness and strength are calculated using the theory of short fibre composites and the results are compared to experimental data. The results differed from the experimental values by 0–6%. With less aligned fibres the short fibre theory is not feasible. The performance of the 40 wt% birch pulp – polylactic acid composite is predicted with X-ray microtomography based finite element modelling, and the results are compared with experiments. Stiffness results differed from experiments by 1–17% . By adding into the models a third material phase representing the interface between the fibres and the matrix, the stress–strain c…

microtomographyMaterials scienceComposite number02 engineering and technologyengineering.materialshort fibre composites strengthchemistry.chemical_compoundfibres0203 mechanical engineeringPolylactic acidimage analysisMaterials Chemistrymedicinepolymer matrix compositesComposite materialta216finite element modellingProperTunekuidutta214modelta114Mechanical EngineeringPulp (paper)Wood-plastic compositeStiffness021001 nanoscience & nanotechnologyMicrostructureFinite element method020303 mechanical engineering & transportschemistryshort fibre compositesMechanics of Materialskuva-analyysiCeramics and Compositesengineeringmedicine.symptomelastic properties0210 nano-technologystrengthelastiv properties
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X-ray micro-tomography based FEM modelling of hygroexpansion in PLA composites reinforced with birch pulp fibres

2017

This article presents a microscale modelling approach coupled with X-ray computed micro-tomography for the evaluation of material properties of polylactic acid (PLA) reinforced by birch pulp fibers under the effect of moisture. The results in terms of elastic moduli and hygroexpansion deformation were found in good agreement with the measurements taken at different levels of water uptake.

Materials sciencePLA compositesengineering.materialchemistry.chemical_compoundimage-based modelingPolylactic acidX-ray micro-tomographyFEM-ohjelmistotComposite materialta216Elastic modulusMicroscale chemistryta212hygroexpansionFEMta114MoistureMechanical EngineeringPulp (paper)X-rayFinite element methodimage-based modellingchemistryMechanics of MaterialsengineeringArtikkelitwooden fibersMaterial propertiesRakenteiden Mekaniikka
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