6533b85cfe1ef96bd12bc874
RESEARCH PRODUCT
Estimation of the elastic constants of highly porous cellular plastics reinforced with fibres embedded in foam struts
A LagzdiņšI. BeverteA. ZilaucsJanis Andersonssubject
chemistry.chemical_classificationMaterials scienceMechanical EngineeringComposite numberStiffness02 engineering and technologyPolymer021001 nanoscience & nanotechnologyStructural elementchemistry.chemical_compound020303 mechanical engineering & transports0203 mechanical engineeringchemistryMechanics of MaterialsHighly porousMaterials ChemistryCeramics and CompositesmedicineComposite materialElasticity (economics)medicine.symptom0210 nano-technologyPolyurethaneStiffness matrixdescription
In order to enhance the mechanical properties of polymer foams, fillers of different materials and sizes are being applied. Fibrous fillers shorter than the characteristic foam cell dimensions have the potential of efficient reinforcement, due to their high aspect ratio, without detrimentally interfering with foam structure. A theoretical model is developed for evaluation of the effect of filler on foam stiffness. The elastic response of rigid polymer foams filled with short fibres, of length commensurable with that of foam struts, is modelled by using the orientational averaging technique. Explicit expressions for components of the stiffness tensor of composite foams are derived in terms of elasticity characteristics of the polymer and reinforcing fibres, fibre content, foam density, and parameters of the orientational distribution of foam struts. The model is applied to describing the foam stiffness as a function of fibre loading of polyurethane foams filled with milled carbon fibres.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-06-30 | Journal of Composite Materials |