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Laboratory of Long-Term Properties of Materials
Research activities
Deformability of polymers in service conditions |
| Objects |
- Unfilled thermosetting and thermoplastic polymer matrices;
- Polymer composites filled with nano-, and microfillers;
- Fibre-reinforced polymer composites.
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| Methods |
- Quasistatic and cyclic experiments in tension, compression and bending, creep experiments;
- Long term deformability in simple and complex stress states;
- Superposition principles (time-temperature-stress-moisture) for the evaluation of changes in time-dependent properties of a material;
- Prediction of deformability taking into account effects of environmental factors.
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Physical properties and structure of polymers |
| Objects |
- Unfilled thermosetting and thermoplastic polymer matrices;
- Polymer composites filled with nano-, and microfillers;
- Fibre-reinforced polymer composites.
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| Methods |
- DMA;
- TMA;
- Dilatometry;
- Thermal conductivity tests by hot discs’ method;
- Optical microscopy;
- Joint tensile test and electrical resistivity measurement.
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Moisture sorption by polymer and composite materials |
| Objects |
- Unfilled thermosetting and thermoplastic polymer matrices;
- Polymer composites filled with nano-, and microfillers;
- Fibre-reinforced polymer composites.
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| Methods |
- Moisture absorption processes (Fickian and non-Fickian) in a humid atmosphere/water under stationary and nonstationary action of different factors (temperature and loading);
- Structural approach to calculation of moisture sorption characteristics;
- Calculations of moisture transport through phase border and distribution in multilayer systems;
- Alternative sorption models;
- FEM analysis of sorption processes in constructions.
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Nanocomposites |
| Objects |
- Polymer matrices filled with carbon nanotubes, graphene and mineral nanofillers.
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| Methods |
- Manufacturing of test specimens;
- Estimation of filler dispersion by optical microscopy;
- Quantitative optical analysis of filler dispersion degree;
- Study of mechanical and physical properties of nanocomposites.
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Self-monitoring composites: visualisation of a mechanical action |
Objects |
- Encapsulated dyes;
- Biomimetic epoxy/GFRC;
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Visualization of mechanical action |
Methods |
- “Bruisable” coatings/layers for damage visualization
- Digital image analysis;
- Vacuum Assisted Resin Transfer Molding/Vacuum Bag Molding;
- Study of mechanical and physical properties of bruisable materials.
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Self-healing composites |
Objects |
- Epoxy matrix;
- Biomimetic self-healing epoxy/GFRC;
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Self-healing composites testing process |
Methods |
- Binary vascular approach for self-healing;
- Vacuum Assisted Resin Transfer Molding;
- Study of recovery of mechanical and physical properties of
self-healing materials.
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Anchors for composite rods |
Objects |
- Anchor for UD high-strength CFRP/epoxy rod.
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3D stress-strain states analysis by FEM |
Methods |
- 3D stress-strain states analysis by FEM;
- Tensile tests.
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