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Projects / Programmes source: ARIS

Development evaluation

Periods
Research activity

Code Science Field Subfield
2.11.03  Engineering sciences and technologies  Mechanical design  Special development know-how 

Code Science Field
T210  Technological sciences  Mechanical engineering, hydraulics, vacuum technology, vibration and acoustic engineering 

Code Science Field
2.03  Engineering and Technology  Mechanical engineering 
Keywords
mixture distributions, elastomers, rheological models, energy methods, batteries, fatigue strength, impact strength, casted parts, hybrid and polymer structures, mechanical safety elements, light-weight design, 3D printed products, wood, wood-based composites and hybrids, fracture mechanics, fatigue
Evaluation (rules)
source: COBISS
Points
8,605.43
A''
772.07
A'
4,784.34
A1/2
6,232.73
CI10
1,691
CImax
76
h10
20
A1
28.91
A3
7.56
Data for the last 5 years (citations for the last 10 years) on July 21, 2024; A3 for period 2018-2022
Data for ARIS tenders ( 04.04.2019 – Programme tender , archive )
Database Linked records Citations Pure citations Average pure citations
WoS  200  2,193  1,496  7.48 
Scopus  226  2,708  1,928  8.53 
Researchers (18)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  57312  Sanel Avdić  Mechanical design  Junior researcher  2023 - 2024 
2.  50469  Silva Brenčič    Technical associate  2019 - 2022 
3.  15683  PhD Gorazd Fajdiga  Mechanical design  Researcher  2019 - 2024  267 
4.  58152  Gregor Gaberšček  Forestry, wood and paper technology  Junior researcher  2023 - 2024 
5.  32075  PhD Aleš Gosar  Mechanical design  Researcher  2019 - 2024  117 
6.  23494  PhD Bojan Gospodarič  Forestry, wood and paper technology  Researcher  2019 - 2024  71 
7.  53509  Jure Kajbič  Mechanical design  Researcher  2019 - 2024  26 
8.  16334  PhD Jernej Klemenc  Mechanical design  Researcher  2019 - 2024  799 
9.  54776  Aljaž Litrop  Mechanical design  Junior researcher  2020 - 2024  26 
10.  22063  PhD Miran Merhar  Forestry, wood and paper technology  Researcher  2019 - 2024  99 
11.  13469  PhD Marko Nagode  Mechanical design  Head  2019 - 2024  821 
12.  10370  PhD Ivan Okorn  Mechanical design  Researcher  2019 - 2020  105 
13.  26561  PhD Simon Oman  Mechanical design  Researcher  2019 - 2024  260 
14.  39189  PhD Branislav Panić  Mechanical design  Researcher  2019 - 2024  24 
15.  29047  PhD Domen Šeruga  Mechanical design  Researcher  2019 - 2024  337 
16.  32526  PhD Andrej Škrlec  Mechanical design  Researcher  2019 - 2023  91 
17.  37663  PhD Dejan Tomažinčič  Mechanical design  Researcher  2022 - 2024  58 
18.  28018  Drago Vidic    Technical associate  2019 - 2024 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0782  University of Ljubljana, Faculty of Mechanical Engineering  Ljubljana  1627031  29,574 
2.  0481  University of Ljubljana, Biotechnical Faculty  Ljubljana  1626914  67,269 
Abstract
A. We want to simplify, speed up and improve the REBMIX, to add an EM step to it, prove its superiority in classifications, upgrade it by taking into account censored data and add new parametric families. B. We want to upgrade, validate and integrate the method of estimating the durability of elastomers into the commercial software, to determine the parameters for the model for different types of elastomers and form a database. C. We want to explore creep of metals and non-metals, to model creep damage with Prandtl operators, to test new materials and to connect creep curves with tensile tests at different strain rates and temperatures. D. We want to develop rheological models. We are interested in the models for cyclic loadings. We are particularly interested in those materials which exhibit asymmetric response in tensile and compressive range. We want to test the models experimentally and numerically. E. We want to upgrade the energy model for durability predictions with the possibility of taking elastic, plastic and viscous energy separately into account. In this scope, we aim to consider the influence of the mean stress level and the changing temperature. F. We want to model the voltage response of the batteries as a function of temperature and current and to upgrade the estimation of the battery durability. The results of the research will be tested numerically and experimentally at changing temperature and current. G. We are interested in predicting reliability under dynamic loadings with variable amplitudes of load cycles. We want to prove that numerical estimates of the durability can also take into account the technological history of the product. H. We want to explore the possibilities of improving the durability estimation under the dynamic loadings of the load carrying structures containing pores. The goal is a quality estimate of the durability that will be useful at the application level and will not require expensive and time consuming tests. I. We are looking for the load carrying capacity of bio-degradable polymers, reinforced with natural fibres and their properties. For the estimates of stress-strain states and durability, we want to consider the actual state of the material in the carrier elements including hybrids. We want to produce prototypes with 3D printing. J. We want to explore short term and impact loads. The parameters of the material model will be simultaneously evaluated using different types of tests at different speeds using multi-criteria optimisation processes. K. We want to investigate the durability of different tree types theoretically and experimentally at different boundary conditions (dynamic load, temperature, humidity). L. The aim is to produce and evaluate a numerical model for predicting and analysing the mechanical behaviour of a wooden construction or a wood based hybrid. The model will allow to shorten development times and to give an insight into the state of the product already in the development phase.
Significance for science
A. Finite mixture models, clustering and classification are important areas of research worldwide. REBMIX exceeds most competitive algorithms by most of the criteria. Its significance in science is gradually enhancing. B. The durability assessment has always been an important research area that brings new challenges with new materials. Elastomeric materials are an example where improvements contribute significantly to the development of safe and environmentally friendly products. C. A faster and reasonably priced estimation of both creep master curve and creep damage will enable a better estimation of a product durability subjected to thermomechanical loadings. D. A quick and accurate modelling of the stress-strain response will enable a better evaluation of the durability of thermo-mechanically loaded products. E. With the upgraded model, the durability estimation will be more comprehensive, which will lead to better predictions for the most demanding thermomechanically loaded products. F. Thermomechanical fatigue of Li-ion batteries is still weakly studied; there are virtually no scientific publications. Due to the development of electric vehicles, the area is extremely popular. G., H., I., J. Research activities represent scientific contribution in the field of a numerical prediction of product durability, fatigue life and reliability for realistic operating conditions. The research outcomes will represent an improvement with a regard to the existing knowledge and know how, because high quality numerical analyses could be carried out in earlier phases of the product’s R&D process before even the first prototypes are manufactured and tested. With a transfer of testing from a real to a virtual environment the product’s R&D process is significantly shortened and cheapened. At the same time it enables the R&D engineer’s easier performance of sensitivity analyses. K., L. Based on different known durability curves of various tree types for different boundary conditions and on validated numerical models, it will be possible to fairly reliably foretell the mechanical behaviour of the product used already in the stage of developing a product.
Significance for the country
A. REBMIX is used for monitoring of large scale structures (bridges, TV towers etc.). PG successfully cooperates bilaterally with Zhejiang University China. Young researcher is involved in the development of REBMIX. There is an exchange of knowledge with Zhejiang University China and with users of the REBMIX package from different countries of the world. B. Research will be performed in cooperation with two foreign companies. The results will be directly applied in the industry and embedded in a global software package. Therefore, gained knowledge will contribute to the progress in the field of fatigue of elastomeric materials and to the creation of new opportunities in the development and optimization of rubber products. Researcher will be involved in the work. There is an exchange of knowledge between foreign companies and PG. C., D. Slovenian company will be involved in the research to prove its customers the product suitability with regard to customer requirements. Researcher will be involved in the work. An exchange of knowledge takes place between the company and PG. E. Foreign company is interested in our research of estimating the durability of thermomechanically loaded engines. We also expect another foreign company to participate in the development of the corresponding programme code. We expect the exchange of knowledge between the companies and PG. F. Electric vehicles have a great impact on traffic, mobility and environment, as they provide transport with zero emissions and reduce dependence on fossil fuels. We expect an exchange of knowledge between the partners of the international project H2020. G., H., I., J. After the developed research methods will reach a maturity phase (i.e. after they are validated on the cases of simple load carrying structures in the laboratory environment) they will be applied on the cases of real structural elements and products that are (or will be) developed by the Slovenian suppliers in the automotive industry. The most advanced production technologies will be applied (e.g. fast prototyping with 3D printing) and their influence to the product function and durability will be analysed. By doing this, innovative methods for R&D evaluations and innovative prototype manufacturing methods will be introduced to the industrial environment. This will shorten the product development cycles and improve competitive advantage of the economy. In parallel to the described research activities an education of Ph.D. students will take place within the PG. Two Ph.D. students will participate in the research activities. Beside them the other members of the PG will co-operate with the Slovenian automotive suppliers, which will enable a validation of the developed methods and procedures on the cases of real products and faster knowledge transfer to the industry. We will also strive to do common research on some of the above described research activities with research groups from abroad. K., L. Companies from Wood Industry Cluster are already included in the research. Companies are interested in the experimental part of the research and also in the numerical part, which has not been used as a development tool in the field of wood industry so far. These tools would enable Slovenian companies to develop more rapidly; in addition their development would be cheaper. In this way they would be more competitive abroad. Researcher will take part in the research. He is a specialist in the field of modelling porous materials. We expect additional development activities with the Slovenian company.
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Most important socioeconomically and culturally relevant results Interim report
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