Dzień 1 | - Basic concepts related to polymers:
- monomer, polymer, mer,
- plastic labelling system.
- Molecular and supermolecular structure and its impact on plastics’ properties:
- definitions of molecular and supermolecular structure,
- influence of the molecular structure on the properties (structure of macromolecules, molecular mass and its disintegration).
- Physical states of plastics and their behaviour in particular states.
- Properties of plastics in the solid (performance) state:
- differences between polymers and other materials used in the industry (metals, ceramics),
- cechanical properties of plastics,
- polymers as viscoelastic materials, creep and stress relaxation in plastics,
- influence of heat on the properties.
- Variability of properties of polymer materials:
- variability of properties depending on processing conditions,
- modification and its influence on the properties,
- using plastics’ databases.
- Introduction to strength of materials:
- stresses, deformation,
- reduced stresses,
- elastic modulus,
- Poisson number,
- strength conditions for: permissible deformation, permissible stresses,
- rules for the selection of factor of safety,
- resistance to buckling,
- fatigue strength,
- interpretation of basic tribology terms (coefficients of static and kinetic friction, resistance to abrasion.
- Methodology of tests on plastics:
- mechanical tests,
- tensile tests, compression tests, bend tests – interpretation of diagrams,
- strength properties determined in these tests for plastics with and without yield limit,
- determining the modulus.
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Day 2 | - Determining strength properties of the polymer construction materials in the following tests:
- tensile, bend and compression tests,
- creep and relaxation tests.
- Impact tests.
- Shore’s method of determining hardness of elastomers.
- Discussion of thermal analysis from the point of view of usefulness in design issues of elements made of polymeric materials on the example of Dynamic Scanning Calorimetry (DSC).
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Dzień 3 | - Technological feasibility of components injected using plastics:
- a notion of technological feasibility,
- dimensional accuracy of the injected elements,
- wall thickness,
- radii and curves,
- wall tilts,
- threads,
- design solutions facilitating removing molded parts from the mold.
- Strength characteristics of plastics:
- revision of the basic information about physical states of polymers,
- durability calculations for plastics,
- temperature dependence of durability and stiffness,
- time dependence of durability,
- isochronous curves and their applications,
- Oberbach's method of strength prediction,
- Miner’s principle and its application,
- breaking loads,
- relationship between durability and deformation speed,
- influence of degradation processes on durability,
- strength calculations performed by the coach,
- strength calculations performed by the participants supervised by the coach.
- Selected aspects of plastics fatigue:
- revision of the basics of material fatigue,
- specificity of plastics fatigue,
- issues concerning plastics fatigue examination,
- fatigue calculations of loaded elements performed by the coach.
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Day 4 | - Designing ribbed elements made of plastics:
- replacing metal plates with their plastic alternatives,
- rules for choosing the proper rib shape,
- designing one-way ribbed plates,
- designing two-way ribbed plates,
- calculations of ribbed elements performed by the coach,
- calculations of ribbed elements performed by the participants supervised by the coach.
- Designing snap-fits:
- types of snap-fits,
- approved deformations in snap-fits,
- hitch connectors,
- cylindrical connectors,
- ball joints,
- calculations for snap-fits performed by the coach,
- calculations of snap-fits performed by the participants supervised by the coach
- Designing threaded and self-tapping joints:
- revision of the basic information about threaded joints,
- plastic-to-plastic threaded fitting,
- plastic-to-metal fittings,
- design principles for self-tapping joints,
- calculations of threaded and self-tapping joints performed by the coach,
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Day 5 | - Designing plug-in connections involving plastics:
- revision of the basic information about plug-in connections,
- types of plug-in connections involving plastics,
- basic design principles,
- calculations of plug-in connections,
- strength calculations of plug-in connections,
- calculations of plug-ins performed by the coach.
- Designing slide bearings:
- revision of the basic information about slide bearings,
- slide bearings made of plastics,
- loads of slide bearings,
- abrasive wear,
- calculations of slide bearings performed by the coach.
- Designing gears made of plastics:
- revision of the basic information about gears,
- applications of plastics in gears,
- design principles of gear wheels with parallel teeth,
- basic calculations,
- calculations of gear wheel with parallel teeth performed by the coach.
- Plastic springs:
- types of springs,
- materials used for spring-making,
- principles of spring designing,
- exemplary calculations.
- Principles regarding designing covers, bodies and housings:
- designing rules,
- plastics used in manufacturing covers, bodies and housings,
- calculation methods,
- manufacture technologies.
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