Numerical simulations are an integral part of design of machine parts in automotive, energy, military and aerospace industries and beyond. Therefore, the research group is dealing with plasticity, both isotropic and anisotropic, for monotonic loading, which is typical for manufacturing processes or accidents. All of that with identification of yield surface and flow curve of metals ranging from steels, to aluminium alloys and superalloys of nickel manufactured additively, even for miniature test specimens. This is closely followed by the prediction of ductile fracture using an explicit formulation of the finite element method. The crack initiation and propagation can then be modelled using phenomenological criteria by the deletion of elements, for example, which the research group successfully applies to other materials, such as hardwood. As many machine elements are loaded cyclically, eventually under elevated temperatures, the research group also deals with cyclic plasticity covering softening and hardening at strain-controlled loading, ratcheting at stress-controlled loading, evolution of kinematic hardening with the application of machine learning, including the multiaxial nonproportional loading and prediction of low-cycle fatigue life.

Awards

• https://www.fme.vutbr.cz/fakulta/aktuality/42404 (only in Czech)

Projects

• The selection and implementation of procedures for low-cycle fatigue evaluating of reactor pressure vessel internals including multiaxial stress state

• ROTCUT (From linear to rotary cutting of hardwood)

• Computational modelling of ductile fracture of identical wrought and printed metallic materials under ultra-low-cycle fatigue

Significant publications

• https://www.sciencedirect.com/science/article/pii/S0749641922000833

• https://www.sciencedirect.com/science/article/pii/S0264127517309206

• https://www.sciencedirect.com/science/article/pii/S0020740316000515

Contact person
doc. Ing. František Šebek, Ph.D.