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Krzysztof KUBIAK

Research activities

Application of surface morphology analysis in Material Science:

  • creation of fretting-fatigue maps concept for damage qualification under complex loading condition Read more...
  • analysis of roughness influence on running conditions and material response fretting maps,
  • influence of machining process (milling, polishing) on friction and wear under fretting condition,
  • analysis of lubrication (ZDDTP) in rough (milling) and smooth (polishing) interface in contact subjected to micro-sliding,
  • analysis of contact pressure in rough interface for dry and lubricated contact,
  • influence of roughness on friction and sliding in tribological interface,
  • development of fast fretting methodology for coating and surface treatments,
  • contact displacement measurement under fretting-fatigue loadings,
  • dissipated energy quantification under fretting fatigue loadings,
  • application of potential drop technique for crack propagation analysis under fretting fatigue loadings,
  • influence of surface morphology on wear damage in tribological contact interface,
  • development of theoretical model for contact angle prediction on rough surfaces, combining Wenzel and Cassie-Baxter approaches,
  • influence of surface roughness on wettability,

 

Application of surface morphology analysis in Computational Fluid Dynamics:

  • modelisation of surface roughness boundary conditions, in CFD analysis,
  • influence of roughness on contact angle hysteresis,
  • development of contact angle hysteresis model and its application in solid fluid interaction analysis,
  • analysis of surface roughness influence on droplet impact and spreading,
  • influence of roughness on droplet coalescence dynamic,

 

Application of statistical method in Material Science:

  • polar plots representation for coating evaluation in tribology,
  • application of Design of Experiment (DOE) methodology for tribological test optimisation,
  • surface response method for contact loading analysis (pressure, friction, roughness, lubrication),
  • application of Pareto Chart analysis for test condition factors evaluation,
  • analysis of variance (ANOVA) for tibological response quantification,
  • application of covariance analysis for surface roughness influence on friction and wear.

 

Application of mesoscopic modelling method in Material Science:

  • creation of contact angle hysteresis model for fluid-solid interaction Read more...
  • development of parallel solver for Lattice Boltzmann method,
  • roughness influence on lubrication and wettability in tribological contact,

 

Application of Lattice Boltzmann Method:

  • internal flow analysis during droplet coalescence in inkjet printing,
  • numerical PIV (Particle Image Velocimetry) of spreading droplet after impact on solid surface and coalescence with sessile droplet,
  • analysis of neck creation during sessile droplets coalescence,
  • bubble entrapment analysis in early stage of droplet coalescence,
  • dynamic of neck expansion during droplet coalescence,
  • surface energy influence (wettability) on droplet coalescence dynamic,
  • prediction of final footprint of droplets in inkjet printing,
  • prediction of final footprint after droplet coalescence,

 

Application of numerical method in Material Science:

  • modellisation of Wholer curve under fretting fatigue loadings,
  • calculation of Stress Intensity Factor for crack nucleation prediction,
  • calculation of multiaxial fatigue criterion (Crossland, DangVan, Papadopoulos) under complex contact loadings,
  • calculation of crack arrest condition under fretting and fretting fatigue loadings using Finite Elements Method (FEM),
  • calculation of Stress Intensity Factor (SIF) by Weight Function using FEM.
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