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Projects / Programmes source: ARIS

Development evaluation

Periods
Research activity

Code Science Field Subfield
2.11.00  Engineering sciences and technologies  Mechanical design   

Code Science Field
T120  Technological sciences  Systems engineering, computer technology 

Code Science Field
2.11  Engineering and Technology  Other engineering and technologies 
Keywords
Operation state prediction, RMS quantities, operational state modelling and simulation
Evaluation (rules)
source: COBISS
Researchers (26)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  32074  PhD Ana Bižal  Materials science and technology  Junior researcher  2009 - 2013  29 
2.  01392  PhD Bojan Bučar  Forestry, wood and paper technology  Researcher  2009 - 2012  174 
3.  15683  PhD Gorazd Fajdiga  Mechanical design  Researcher  2009 - 2014  266 
4.  00819  PhD Matija Fajdiga  Mechanical design  Researcher  2009 - 2013  1,141 
5.  34407  PhD Mitja Franko  Mechanical design  Junior researcher  2011 - 2014  29 
6.  32075  PhD Aleš Gosar  Mechanical design  Researcher  2009 - 2014  114 
7.  23494  PhD Bojan Gospodarič  Forestry, wood and paper technology  Researcher  2009 - 2014  70 
8.  18003  Juraj Janeš    Technical associate  2009 - 2014 
9.  21351  PhD Miha Janežič  Materials science and technology  Researcher  2012  325 
10.  10108  PhD Tomaž Jurejevčič  Mechanical design  Researcher  2009 - 2014  107 
11.  16334  PhD Jernej Klemenc  Mechanical design  Researcher  2009 - 2014  790 
12.  19240  PhD Andrej Kostanjevec  Mechanical design  Researcher  2009 - 2011  185 
13.  11925  PhD Marijan Medič  Forestry, wood and paper technology  Researcher  2009 - 2010  89 
14.  22063  PhD Miran Merhar  Forestry, wood and paper technology  Researcher  2011 - 2014  99 
15.  13469  PhD Marko Nagode  Mechanical design  Head  2009 - 2014  814 
16.  18623  Miran Nerat    Technical associate  2013 - 2014 
17.  10370  PhD Ivan Okorn  Mechanical design  Researcher  2009 - 2012  103 
18.  26561  PhD Simon Oman  Mechanical design  Researcher  2009 - 2014  255 
19.  17077  PhD Petar Orbanić  Mechanical design  Researcher  2009 - 2011  286 
20.  24245  PhD Uroš Rosa  Mechanical design  Researcher  2009  67 
21.  29047  PhD Domen Šeruga  Mechanical design  Researcher  2013 - 2014  337 
22.  22498  PhD Boštjan Veber  Mechanical design  Researcher  2009 - 2011  68 
23.  28018  Drago Vidic    Technical associate  2009 - 2014 
24.  26555  PhD Matej Volk  Mechanics  Junior researcher  2009 - 2011  42 
25.  20659  PhD Andrej Wagner  Mechanical design  Researcher  2010 - 2011  131 
26.  29046  PhD Henrik Zaletelj  Mechanical design  Researcher  2014  47 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0481  University of Ljubljana, Biotechnical Faculty  Ljubljana  1626914  66,832 
2.  0782  University of Ljubljana, Faculty of Mechanical Engineering  Ljubljana  1627031  29,331 
Abstract
The efficiency of a component, assembly or final product producer primarily depends on its ability to persuade the customer of the product quality. The producer has to carry out the development procedure of a new product in such a way that it is able to economically predict with low risk and in early design stages a part or all of 45 quantities, characteristics, properties of the product in its usage phase (e.g. functionality, durability, reliability, maintainability, supportability, ergonomics, ecological worth, aesthetic value, production and usage economy). The development prediction of the product properties, characteristics or product worth in the usage phase are based on the theoretical knowledge in the fields, such as: probability, operational state prediction in extreme environmental conditions (temperature), modelling of alike states (parametric, nonparametric), modelling of the material mechanical properties, modelling of states in virtual environment, reliability (R), maintainability (M) and supportability (S) modelling, simulations of boundary operational states, experimental techniques. In recent research of the programme group the topics where basic knowledge has to be broadened have been defined: - operating states and their scatter modelling by applying mixture probability functions; - modelling of the random loads and operational states by neural networks; - durability modelling at variable and complex operating conditions and material properties; - modelling of the target operating properties on the basis of the starting material and technological values; - research of the domain of usability of the RMS values in the development procedures; - development of methods for service life prediction of low and high cycle loaded products operating at variable and high temperatures; - effectiveness of experimental techniques in development procedures; - development reliability and maintainability prediction of complex and assembled products; - research of production procedures and their influence upon the development solutions of products and technologies (wood machines, transport devices); - research of dynamic phenomena on machines (transport devices, wood machines) on product quality or production technology; - research of mechanic properties and development solutions of designs with new materials. The aims of the connected research work within the programme group and in connection with other programme groups are as follows: - to supplement the basic knowledge in the field of the development prediction in such a way that it will be possible to assemble and to introduce the improved development technology in the working organisations; - to enable the efficiency and good competitive position of the working organisations by applying this knowledge in the key development process phases; - to qualify the new engineers for leading positions and for engineering positions in the industry through undergraduate and postgraduate studies.
Significance for science
The most important achievements of the programme group Development Evaluations can be in the period from 2009 to 2014 summarised as: - The algorithm to estimate the parameters and weights of finite mixture distributions has been updated and improved. It now includes normal, log-normal, Weibull, gamma, Poisson, binomial and Dirack parametric families. A programme code has been designed in programming languages C and R, it is published on http://cran.r-project.org/web/packages/rebmix/index.html and allows easy use and simple maintenance and upgrading for the developers. - An algorithm has been developed to predict the stress-strain states and lifetimes in terms of thermo-mechanical fatigue in the time domain. The algorithm is based on Prandtl operators and takes into account elasticity, plasticity, viscosity, fatigue, creep and oxidation of the material. The algorithm is available as Thermal Fatigue option of the software manufacturer Siemens http://www.plm.automation.siemens.com/en_us/products/lms/virtual-lab/durability/options.shtml. - New knowledge in understanding stress-strain states and lifetimes of air springs and rubber has been developed and published. - New knowledge in understanding the thermo-mechanical fatigue in the frequency domain has been developed and published. - New knowledge in understanding the aging of metallic materials with and without the presence of welded joints has been developed and published. - New knowledge in understanding the fatigue of aluminium castings with errors and without them has been developed and published. - New knowledge in understanding the fatigue of hybrid metallic and non-metallic materials has been developed and published. - New knowledge in understanding the behaviour of materials and components for mechanical loads that result in high strain rates has been developed and published. - Descriptions of durability curves and their spread have been amended and improved with methods of artificial intelligence and evolutionary algorithms. - Developed and applied was new knowledge in the field of autonomous self moving systems for multi-purpose manipulation and processing of products. - New knowledge in the field of modeling of wooden construction composites was developed. - New knowledge in the field of chip formation process in the cutting of lignocellulosic composites was developed. - New knowledge in the field of evaluation of load capacity of lignocellulosic composites packaging was developed.
Significance for the country
The most important achievements of the programme group Development Evaluations can be in the period from 2009 to 2014 summarised as: - Our knowledge in the course of Machine Elements 1, 2 and 3, Operational strength, Development Evaluations, Effectiveness of systems, Effectiveness of products, Vehicle dynamics, Transmissions of vehicles, Machinery elements and drive technique, Mechanical processing technologies automation, Wood mechanical processing machinery has been transferred to students of the I. and the II. degree and to doctoral students. - We have been mentors to 93 new graduates, 9 masters and 10 doctors of science. - We helped the following companies based in Slovenia with our knowledge when solving R & D problems: Cimos, Hella Saturnus Slovenija, TPV, Knauf Insulation, Sistemska Tehnika, Continental, SIP Šempeter, BSH HIŠNI APARATI, Žičnice Vogel Bohinj, M Sora.
Most important scientific results Annual report 2009, 2010, 2011, 2012, 2013, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2009, 2010, 2011, 2012, 2013, final report, complete report on dLib.si
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