Fatigue and Stress Distribution

Stress Concentrations , Fatigue , Fracture

The fundamental topic in this document is the development of cracks in steel. For structures subjected to cyclic loads, such cracks can develop over time and ultimately reach the size at which some dramatic failure occur. While this problem is rare in structures made of “mild steel,” the use of “high tensile” steel changes that situation. It is straightforward to double the strength of mild ste...

Stress Corrosion and Static Fatigue of Glass

to be published in Zeitschrift fuer Anorganische und Allgemeine Chemie. (b) Vladimir Balek, “Rare-Gas Diffusion, Reactivity and Electrical Conductivity of Solid ZnO”; to be published in Physica Status Solidi. l2 J. Beretka and M. J. Ridge, “Formation of Zinc Ferrite at Low Temperatures,” Nature (London), 216 [5114] 473-74 (1967). l3 Vladimir Balek. “Emanation Method for Estimating Reactivity of...

Stress and fatigue constrained topology optimization

This thesis concerns structural optimization in conceptual design stages, for which constraints that are adapted to industrial requirements have been developed for topology optimization problems. The objective of the project has been to identify and solve problems that today prevent structural optimization from being used in a broader sense in the avionic industry; the main focus has been on st...

Thermal Stress Resistance to Fracture and its Relation to with Resistance to Thermal Fatigue and Shock

Dense Silicon nitride was investigated to determine the effect of its microstructural parameters and densification on thermo-mechanical properties and thermal stress resistance to fracture initiation during a hot or cold mechanical and thermal shock testing. The different materials and microstructures were obtained by changing the parameters such as the type of the powder, additive, forming p...

Valve Stress Analysis- For Fatigue Problems