1. Deformation behaviour of optimised three-dimensional axisymmetric chiral auxetic structuresNejc Novak, Alen Grebo, Matej Borovinšek, Lovre Krstulović-Opara, Zoran Ren, Matej Vesenjak, 2025, izvirni znanstveni članek Opis: Background/Objectives: Developing functional tissue constructs via 3D bioprinting relies heavily on scaffold architecture, demanding precise mechanical tunability and highresolution feature fidelity. Methods: This paper presents a novel approach utilising photocurable resins and resin 3D printing to fabricate auxetic axisymmetric chiral structures (ACSs), which can be used for advanced scaffold engineering. Results: The experimental tests showed that the optimised ACS (optACS) possess superior mechanical properties compared to their non-optimised counterpart. Both analysed structures possess an auxetic behaviour up to 40% longitudinal strain, with a Poisson’s ratio of about −0.1. Conclusions: This auxetic capability is promising for biomedical applications, particularly in developing enhanced stents or tissue scaffolds.
Ključne besede: auxetic, axisymmetric chiral structures, 3D printing, mechanical testing, deformation behaviour, optimisation
Objavljeno v DKUM: 10.12.2025; Ogledov: 0; Prenosov: 3
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2. Termo-mehanska analiza nosilca za valjeŽan Gorenšek, 2025, magistrsko delo Opis: V magistrskem delu analiziramo nosilec za valje, ki je skupaj z valji izpostavljen ciklični toplotni obdelavi. Pri tej temperature močno narastejo, kar povzroča pojav lezenja. Mehanizem lezenja, njegovi vplivi ter uporabljene metode analize so sistematično predstavljeni. Na tej podlagi pripravimo numerični model in izvedemo preračune ključnih parametrov prestopa toplote. Sledi termo-mehanska numerična simulacija obravnavane toplotne obdelave. Na podlagi dobljenih rezultatov ocenimo življenjsko dobo nosilca oziroma določimo število ciklov toplotnih obdelav do porušitve.
Ključne besede: lezenje, dimenzioniranje na življenjsko dobo, numerična simulacija, toplotne obdelave, prestop toplote
Objavljeno v DKUM: 09.12.2025; Ogledov: 0; Prenosov: 0
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3. Editorial : special issue of the Faculty of Mechanical Engineering, University of MariborMatej Vesenjak, Matej Borovinšek, Simon Klančnik, 2025, drugi znanstveni članki Opis: This editorial introduces the Special Issue of the Strojniški vestnik - Journal of Mechanical Engineering dedicated to the 30th anniversary of the Faculty of Mechanical Engineering as an independent member of the University of Maribor, and the 50th anniversary of the University of Maribor. The Faculty of Mechanical Engineering is one of the most successful members at the University of Maribor and is recognised for its excellence in education, research and collaboration with industry. Its history of development, from its early beginnings in 1959 to becoming an internationally active and research-driven institution, reflects a continuous commitment to technological progress and societal impact. The Special Issue presents a selection of articles covering applied fluid mechanics, advanced materials and metamaterials, manufacturing science, and biomedical modelling. The collected works combine experimental, numerical, and review-based approaches to address contemporary challenges in mechanical engineering. This publication not only highlights the scientific excellence achieved at the Faculty of Mechanical Engineering, University of Maribor, but also celebrates its enduring mission to connect knowledge, innovation and human creativity in shaping a sustainable and technologically advanced future.
Ključne besede: applied fluid mechanics, computational fluid dynamics (CFD), hydropower systems, advanced materials, metamaterials, triply periodic minimal surfaces (TPMS), biomedical modelling, inverse bioheat problem, intelligent toolpath generation, artificial intelligence in manufacturing
Objavljeno v DKUM: 08.12.2025; Ogledov: 0; Prenosov: 4
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4. Parametrizacija ter numerična analiza pomožne šasije tovornega vozilaŽiga Črešnik, 2025, magistrsko delo Opis: Namen magistrskega dela je zasnova parametričnega 3D-modela, s pomočjo katerega bi podjetje poenostavilo konstrukcijski postopek za določanje pomožne šasije tovornega vozila. V nadaljnjem koraku bi ta model lahko uporabilo tudi za numerični preračun po metodi končnih elementov. Magistrsko delo obsega pregled obravnavane tematike oziroma industrije tovornih vozil, predstavitev parametričnega modela ter predstavitev numeričnega modela. Končni rezultat dela je torej parametričen 3D-model, ki konstrukterju poenostavi delo in zmanjša čas, potreben za izdelavo modela, kakor tudi numerični model, ki omogoča podoben vpogled v trdnostne lastnosti šasije.
Ključne besede: tovorno vozilo, pomožna šasija, parametrizacija, metoda končnih elementov
Objavljeno v DKUM: 02.12.2025; Ogledov: 0; Prenosov: 5
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5. Stiskalnica za poravnavo kovinskih profilovJure Zalar, 2025, diplomsko delo Opis: V zaključnem delu smo obravnavali problem neporavnanih kovinskih profilov pred razrezom, kar pogosto vodi do netočnosti, večjega odpada in zmanjšane učinkovitosti proizvodnje. Z uporabo analize zahtev, izbire ustreznega mehanizma ter konstruiranja po CE standardih smo razvili stiskalnico za poravnavo profilov. Naprava omogoča hitro, natančno in varno poravnavo različnih profilov brez njihove deformacije. Ugotovili smo, da strojna poravnava bistveno zmanjša možnost napak in izboljša produktivnost v proizvodnem procesu.
Ključne besede: konstruiranje, stiskalnica kovinskih profilov, standardni kovinski profili, SolidWorks
Objavljeno v DKUM: 27.10.2025; Ogledov: 0; Prenosov: 0 |
6. Razvoj vizualnega orodja za nadzor in vzdrževanje industrijskih obratov : magistrsko deloGašper Močnik, 2025, magistrsko delo Opis: V številnih sodobnih industrijskih obratih, zlasti na področju procesne tehnike, so podatki o strojih, napravah in vzdrževanju še vedno pogosto shranjeni v papirni obliki ali razpršeni po različnih fizičnih in digitalnih lokacijah. Takšen razpršen sistem otežuje učinkovit dostop do informacij, zmanjšuje preglednost ter upočasnjuje operativne in vzdrževalne postopke. V magistrskem delu je bilo razvito digitalno orodje, ki omogoča uvoz 3D modela industrijskega obrata v interaktivno okolje. Na ta model lahko uporabnik veže podatke, kot so vrsta posamezne komponente, realnočasovni obratovalni parametri ter tehnična in tehnološka dokumentacija. Na ta način je omogočen neposreden vizualni dostop do podatkov, brez potrebe po iskanju po šifrah ali kompleksnih seznamih.
Ključne besede: Digitalni dvojček, napredno vzdrževanje, procesna industrija, 3D proizvodnja, blender, python, raylib
Objavljeno v DKUM: 22.09.2025; Ogledov: 0; Prenosov: 11
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8. Razvoj novih 2D avksetičnih struktur z uporabo genetskega algoritma : magistrsko deloJernej Kojzek, 2025, magistrsko delo Opis: V magistrski nalogi so predstavljeni razvoj in rezultati optimizacije novih 2D avksetičnih struktur z uporabo genetskega algoritma in metode končnih elementov. Razvita je optimizacijska zanka, s katero se strukture generirajo, simulirajo in ocenijo. Osnovna celica se v strukturo zloži po vnaprej določenem vzorcu. Mehanski odziv struktur je določen z linearno elastičnimi simulacijami, pri čemer se kot obremenitev uporabi pomik. Ker vse generirane strukture ne izkazujejo avksetičnega obnašanja, se za ločevanje dobrih in slabih uporabi matematična ocena.
Ključne besede: avksetični material, genetski algoritem, metoda končnih elementov, topološka optimizacija
Objavljeno v DKUM: 20.06.2025; Ogledov: 0; Prenosov: 41
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9. Quasi-static and impact behaviour of polymer-metal interpenetrating phase TPMS compositesNejc Novak, Oraib Al-Ketan, Anja Mauko, Lovre Krstulović-Opara, Shigeru Tanaka, Matej Borovinšek, Boštjan Vihar, Uroš Maver, Kazuyuki Hokamoto, Matej Vesenjak, Zoran Ren, 2025, izvirni znanstveni članek Opis: Interpenetrating phase composites (IPC) are materials with two or more mutually continuous, interconnected phases. This structure allows each phase to retain its properties, while together they exhibit enhanced synergistic properties. In this work, polymer-metal IPCs with Triply Periodical Minimal Surface (TPMS) structures were fabricated and tested for their mechanical properties at different impact velocities (ranging from 0.1 mm/s to 250 m/s). Samples. The samples comprise a stainless steel reinforcement phase and two polymeric matrices (silicone and epoxy). Computed tomography was used to evaluate the internal structure and the fabrication quality. The results showed that the samples were thoroughly infiltrated with polymeric filler, achieving a high degree of homogeneity in the composite. The compression tests of silicone-filled IPCs showed an increase in stiffness. Still, the Specific Energy Absorption (SEA) was not improved due to the non-optimal stiffness ratio between the polymeric matrix and the metallic reinforcement phase. However, using epoxy as the matrix resulted in the SEA enhancement of 38 %. This is attributed to the interlocking mechanism between the two phases, which improved the macroscopic mechanical properties. The compression tests showed significant strain rate hardening due to the base material’s strain rate sensitivity and the inertia effects.
Ključne besede: TPMS, interpenetrating phase composite, polymer filler, hybrid structure, experimental testing, mechanical properties, strain rate effect
Objavljeno v DKUM: 26.05.2025; Ogledov: 0; Prenosov: 14
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10. A computational model for analysing the wear behaviour of polymer gearsAljaž Ignatijev, Srečko Glodež, Aleš Belšak, Matej Borovinšek, 2025, izvirni znanstveni članek Opis: In the presented study, a computational model was developed to analyse the wear behaviour of contacting mechanical elements like gears, bearings, etc. The model was built in the framework of the PrePoMax open-source CalculiX FEM (Finite Element Method) solver and enables a detailed analysis of the meshing dynamics of contacting mechanical elements. The model also considers the hyperelastic behaviour of the material in contact and the impact of operating temperature. The developed computational model was evaluated on a spur gear pair, where the pinion made of POM (Polyoxymethylene) was meshed with a support gear made of case-hardened steel 16MnCr5. The computational results were compared with the analytical results according to the VDI 2736 guidelines and experimental results on the real gear pairs. Compared to the standardised procedure according to the VDI 2736 guidelines, the model's main advantage is the geometry updating after a chosen number of loading cycles, enabling a more accurate prediction of wear behaviour under rolling/sliding loading conditions.
Ključne besede: wear, polymer gears, computational modelling, experimental testing
Objavljeno v DKUM: 08.04.2025; Ogledov: 0; Prenosov: 18
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