A problem on the fracture of a thin-walled spherical vessel affected by increasing internal pressure is formulated. The material properties both in stage hardening and softening (prefracture) are described. mathematics catastrophe theory used to write down equilibrium equations find critical value pressure, at which fails.

This research project deals with nonlinear evolution problems that arise in the study of the inelastic behaviour of solids, in particular in plasticity and fracture. The project will focus on selected problems, grouped into three main topics, namely: 1. Plasticity with hardening and softening, 2. Quasistatic crack growth, 3. Dynamic fracture mechanics. The analysis of the models of these mechan...

The influence of temperature on the structural and mechanical properties (0.9 C - 13.95 Mn) steel was investigated in this work. high-manganese has underwent aging treatments at temperatures 700, 750, 800 850 °C for different times. experimental techniques used are hardness test, scanning electron microscopy, optical microscopy X-ray diffraction. behavior microstructural evolution during almost...

Background: For the purpose of biorelevant dissolution testing hydrogels have recently been used to investigate release and distribution behavior of drugs released from specialized dosage forms such as drug-eluting stents. For stent testing using the vesselsimulating flow-through cell (vFTC) certain functional properties regarding life time of the used hydrogels such as hardening/ softening, de...