Mechanics of materials and structures
Modelling of Ceramic
3. Modelling of composites: ceramic and polymer Matrix
4. 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 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 loading), 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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