Ternopil Ivan Pul'uj National Technical University

About: Ternopil Ivan Pul'uj National Technical University is a based out in . It is known for research contribution in the topics: Deformation (engineering) & Fracture toughness. The organization has 134 authors who have published 187 publications receiving 1019 citations.

Use of stochastic methods for treatment of cyclic random processes of multiple cracking

Abstract: New methods for treatment of significant amounts of data on nucleation and coalescence of defects were developed. The analysis of the surface condition of modern nanocoated materials was performed.

Prediction of fatigue crack growth diagrams by methods of machine learning under constant amplitude loading

Abstract: Important structural elements are often under the action of constant amplitude loading. Increasing their lifetime is an actual task and of great economic importance. To evaluate the lifetime of structural elements, it is necessary to be able to predict the fatigue crack growth rate (FCG). This task can be effectively solved by methods of machine learning, in particular by neural networks, boosted trees, support-vector machines, and k -nearest neighbors. The aim of the present work was to build the fatigue crack growth diagrams of steel 0.45% C subjected to constant amplitude loading at stress ratios R = 0, and R = –1 by the methods of machine learning. The obtained results are in good agreement with the experimental data.

Regularities of Impact Failure of Epoxy Composites with Al2O3 Microfiller and their Analysis on the Basis of External Surface Layer Concept

Abstract: Impact toughness of epoxy composite materials reinforced with Al2O3 microparticles of various concentrations were investigated. It is shown that the external (outer) surface layers that form around disperse filler particles is one of the factor responsible their mechanical properties.

Failure analysis of continuous casting rolls material and physical simulation of thermal fatigue loading

Abstract: The experimental method for physical modeling of operating conditions of a continuous billet casting machine (CCM) rolls is developed to estimation the temperature field and especially the temperature at the surface of the roll by measuring the temperature with the thermocouples (fully embedded) at multiple point inside the roll. The physical model allows for the automated recording of the quasi-stationary temperature field in the rolls surface layers and at various distances from its working surface. The main mechanisms of impact failure in the service exposed CCM roll material are investigated at the maximum temperature of the thermal cycle.DOI: http://dx.doi.org/10.5755/j01.mech.19.4.5046