Patented solution utilizes all possible energy dissipation mechanisms and represents an optimal (ultimate) solution for the novel damping system. Such damping elements that are built in railway sleeper consist of elastomeric granular material, which is encapsulated in a flexible glass (carbon or basalt) fiber tube. Granular materials when excited beyond a certain level of stress flow similarly as liquids while maintaining all properties of a bulk material. The macroscopic flow of particles further expands the energy dissipation capability of granular materials. Hence, micro- to macro-size multimodal elastomeric granular material may be used as a pressurizing media (similar as air in tires) to impose hydrostatic pressure on itself, and change frequency dependence of its own energy absorption properties. With proper adjustment of pressure we also adjust the stiffness of the damping element (similar as with air in tiers). In addition, the proposed particle-filled damping elements provide greater energy dissipation, since when granular materials are deformed there is relative motion of particles; such motion causes additional energy dissipation through friction. Our proposed solution consists of micro- and macro-sized particles. Smaller particles lead to more surface area per unit volume, which increases the magnitude of frictional dissipation energy caused by particle-particle interaction; while larger particles will allow macroscopic flow, as described above.
F.32 International patent
COBISS.SI-ID: 12444699In the paper published in Planinski vestnik we are dealing with effect of mass on response of climbing ropes. In the work there are explained theoretical characteristics of falls with climbing ropes and calculation of key parametrs. The measurements are preformed on samples of Beal Booster III climbing ropes on non-standard test rig in Center for experimental mechanins Ljubljana. On the base of experiments data analysis is made. The resoults reprisent analysis of force, maximal elongation, energy dissipation and acceleration when the rope is loaded with the falling mass. The resoults show us that the important parameter for the loading of climbers and that it should be considered with the development of new standards.
F.35 Other
COBISS.SI-ID: 14027547RILEM is a volunteer organization grouping academics, researchers, testing laboratories, suppliers, contractors with the aim to promote scientific cooperation in the area of construction materials and structures. In the field of bituminous materials RILEM activities are organised through Technical Committees (TC) and, since late 1960s, brought to outstanding products such as guides to good practice, recommendations and pre-standards, proceedings of symposia and workshops, state of the art reports, data basis, and International Journals. Since 1968 RILEM conferences and symposia have been a major source of state-of-the-art information on bituminous materials and pavements. At the 8th International RILEM Symposium which was held in Ancona, Italy, on October 7-9, 2015, our group was invtited for invited lecture with preentation title: Time-dependant characterization of bitumenus materials. Where knowledge of our group in fileds of annealing, testing, anylyzing of obtained data and modeeling was presented.
B.04 Guest lecture
COBISS.SI-ID: 14270747The purpose of the "19th International Workshop on Advances in Experimental Mechanics" is the overview of the status in the field of Experimental Mechanics, coordination and exchange of ideas on research and applications in this field, and possibilities of knowledge transfer in the industry environment. Besides oral contributions of eminent scientists from all around the world, also "younger" participants have opportunity to present their work, to exchange opinions and establish contacts with experts from other research institutions and companies. Within the Workshop part of discussion and presentations were dedicated to flowability and behavior of granulated materials, where also GFA apparatus (Granular Friction Apparatus) was presented as a new experimental technique to determine friction inside granular material.
B.01 Organiser of a scientific meeting
COBISS.SI-ID: 282435840This journal was released in 1997 and is ranking in the first third regarding the impact factor. This journal is the core publication in the field of time-dependent structural materials. It is published by the leading publishing house of scientific and expert publicism, Springer-Kluwer. Chief editorialship of the journal allows our team direct contact with the research activities of leading experts in this field around the world.
C.01 Editorial board of a foreign/international collection of papers/book