Institute of Physics of Materials CAS Archives • Radius Centre

Ph.D. thesis: Study of the influence of transients phenomena in piezoceramics in terms of fracture-mechanical response

The aim of this work is to determine and explain the change in mechanical behaviour due to transients with emphasis on the fracture mechanical response in selected lead-free piezioceramics. The main goal of the doctoral thesis will be to study the mechanical and fracture behaviour of piezoceramics (for example BTO, BTZC, etc.) during its transition…

Ph.D. thesis: Microscopic processes at the fatigue crack tip

Fatigue crack growth is a process that is described macroscopically by quantities such as the stress intensity factor, J-integral or plastic part of the J-integral. There are many models of crack propagation at the microscopic level that consider plastic deformation around the crack tip, but which differ in details. Advances in experimental methods allow more…

Intern for numerical modeling of failure in heterogeneous materials

This internship offers students the opportunity to participate in research on fracture processes in concrete and other heterogeneous materials. Due to its internal structure—cement matrix, aggregate, and pores—concrete is a complex material in which failure often develops at the cement paste/aggregate interface. The student will work on 2D/3D numerical modeling of this process using cohesive…

Determining the endurance life of selected construction materials

Current methods for determining the fatigue life of concrete structures focus on reducing stresses in structural elements. However, this approach only considers the degradation of mechanical properties due to cyclic loading and not the gradual development of microcracks. This topic is primarily concerned with the experimental determination of the fatigue life of construction materials, particularly…

Intern for research into hydrogen storage materials

This internship offers students the opportunity to participate in research into modern materials designed for the efficient storage of hydrogen – a key element in future energy solutions. The student will participate in the preparation of materials for hydrogen storage, the creation of graphs from measured data, and their basic processing. The internship will also…

Intern for experimental measurement of crack propagation velocity in polyethylene samples

This internship offers students the opportunity to participate in research on the durability of polymer materials, specifically high-density polyethylene (HDPE), which is commonly used in the manufacture of pressure pipes. The aim is to experimentally monitor and evaluate the mechanism of slow crack growth in different types of samples. While methods are well developed for…

Intern for 4D STEM data analysis

This internship offers students the opportunity to engage in modern materials research using the 4D STEM (4D scanning transmission electron microscopy) method. This method allows the diffraction pattern to be recorded at each image point, which can then be analyzed to obtain information about phase composition, crystal orientation, or local deformations. During the internship, students…