1.
Continuum Damage
Mechanics of materials and structures
2.
Multi-scale and
Multi-physics Modelling of Ceramic Polycrystalline Materials
3.
Multi-scale Modelling
of Polymer Matrix
4. Multi-scale Modelling of Porous Materials: ceramics and
polymer foams
5. Modelling of wood and plywood materials
6.
Fracture Mechanics
of materials under mechanical loading and thermal shock
7.
Plates with damage
and sandwich structures
8. Experimental testing of materials and structures under: static, cyclic,
impact loading (SHPB, penetration) and thermal shock
The first part of the research experience of Tomasz Sadowski
covers the theoretical modelling of the behaviour of engineering materials with
internal structure and application of this model to description of the
behaviour of engineering structures like: beams, plates and shells undergoing
internal damage. In the field of theoretical modelling of multiphase
polycrystalline materials the applicant applies two approaches: micromechanical
and phenomenological ones. The high-level quality of the developed model relies
on the possibility of introduction of all information about internal structure of
any polycrystalline materials like: grain diameter, grain boundaries, porosity
of the material, cracks and plasticity, thermal anisotropy, etc. This is so
called “process model” because it allows description of gradual degradation of
the elastic material properties caused by development of porosity, cracks
(including wing cracks model), plastic effects, etc. Performing stochastic
homogenisation procedure it is possible to estimate current material properties
reflected by compliance or stiffness tensors. The innovation in the model is
the description of the material behaviour both under quasi-static and dynamic
loading taking into account necessary data about internal structure from
typical fracture mechanics tests.
The second part of research experience concerns the acquired skills in the wide range
of experimental techniques dealing with testing of materials under mechanical
(quasi-static, cyclic, impact loading, penetration), thermal loading. A special
scientific techniques used in fracture mechanics tests is acoustic emission and
microscopic observations (image analysis) in order to estimate progress of
damage state of the material.
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