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Numerical analysis of adhesively bonded joints
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Darian Milohanić The usage of structural adhesives has increasingly been used in the automotive industry. At the same time the knowledge and the experience about structural adhesive modelling and failure predictions in the field of numerical analysis is limited. In order to reduce these shortcomings, this thesis aims to find a solution to model adhesive behaviour in a full vehicle simulation. Thus, in this thesis, first of all, a literature review was performed. Based on this review, a description of...
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Numerical analysis of cooling of a cylindrical Li-ion battery cell
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Ivan Jelić The task of the thermal management systems (TMS) in the electric vehicles (EV) equipped with the Li-ion battery modules is to prevent the thermal runaway by the effective control of cell-core temperature. This is important mostly due to safety reason because over-temperature of the Li-ion batteries can induce fire and even explosion. In this thesis, it was carried out a numerical conjugate heat transfer analysis of the battery module cooling with the laminar fluid flow. Three battery cell...
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Numerical modeling of dynamics of multibody systems in Lie-group setting
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Ivan Zenzerović A Lie group integration method, proposed in [12] and [11], is presented in the thesis and applied to the case study problem. The way dynamics of multibody system is mathematically modelled is presented and the governing equations, in the form of a DAE system of index 1 and 3, are given. Manifolds are introduced and applied to the dynamics of MBS. Also, the mathematical background of manifolds, groups, vector fields and spaces is presented in the thesis. The special orthogonal group SO (3) is...
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Numerical modelling of combustion process using flamelet generated manifold and coherent flame combustion models
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Marija Stipić In recent times, combustion modelling employing computational fluid dynamics (CFD) in combination with experiment has become an irreplaceable tool in the design process of the diesel engines. Combustion process as a phenomenon of exceptional complexity can be numerically solved with detailed chemical kinetics or with the utilisation of approximated combustion models. Detailed chemical kinetics provides a comprehensive insight into the chemical aspect of the combustion process, while...
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Numerical modelling of heat transfer and dissipation in power electronics applications
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Igor Vodopija Ovaj se diplomski rad bavi analizom prijenosa i disipacije topline unutar sklopa elektroničkih energetskih modula koji su montirani na hladnjak, koristeći numeričke simulacije u softverskom paketu AVL FIRE M. Diplomski rad je napravljen u suradnji s tvrtkom AVL. U radu je validiran numerički model putem već napravljenih eksperimentalnih mjerenja temperature čipova. Mjerenja su napravljena u Grazu, u laboratoriju tvrtke AVL. Nakon toga napravljen je niz parametarskih analiza s ciljem...
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Numerical modelling of non-Newtonian fluid flow during a battery pack filling
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Matteo Kamenjašević During operation, electric vehicle components experience shocks and vibrations that can potentially damage cells within the battery pack. Foam encapsulation enhances the structural integrity of battery pack by securing cells in place, shielding them from potential damage. Structural foams undergo several distinct stages, including the flow of non-Newtonian fluid, curing and foaming before reaching a final stable stage. The main aim of this thesis was to develop a method for numerically...
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Numerical modelling of the preloaded bolted connections
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Matija Kalauz Bolts and bolted connections are the most common compounds that are used in almost all industries, especially in the car industry. Because they are so commonly used, they represent a certain challenge to find a way to stop their loosening and to detect what is their pretension loss due to various influences. In recent times, the car industry is turning to manufacture hybrid and electrical vehicles more and more. Since they are turning to that segment of production, various batteries, which...
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Numerical simulation of impact damage in composite horizontal stabilizer structure
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Dominik Šahović This master's thesis investigates the numerical simulation of impact damage on composite horizontal stabilizer structures caused by bird strikes. The primary objective is to develop and validate a numerical model capable of predicting the damage inflicted by bird strikes on horizontal stabilizers made from carbon fiber reinforced polymer (CFRP). Using advanced computational techniques such as finite element analysis (FEA), the research evaluates the post-impact structural integrity of these...
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Numerička analiza Stockbridgeovog prigušivača
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Josip Zeba U ovom radu opisane su eolske vibracije vodiča dalekovoda, uzrok njihove pojave i posljedice koje imaju na uže. Ukratko je opisan osnovni vibracijski sustav te su prikazane osnovne jednadžbe. Detaljno je opisana konstrukcija Stockbridge prigušivača vibracija te su definirani pojmovi snage koju prigušivač disipira, mehaničke impedancije i faznog kuta između sile i brzine. Napravljen je numerički model (metoda konačnih elemenata) takvog prigušivača korištenjem programskog paketa...
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Numerička analiza cilindrične konstrukcije izrađene od dva polimerna materijala metodom 3D ispisa
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Jurica Rožić Ovaj rad dio je projekta Fakulteta Strojarstva i Brodogradnje koji teži pronaći geometrijske i materijalne parametre s kojima će se moći napraviti uzorak umjetnog tkiva čije će mehaničko ponašanje aproksimirati ponašanje ljudske zajedničke karotidne arterije. Uzorak umjetnog tkiva se radi višekomponentnim 3D ispisom. Aditivna tehnologija, specifično tehnologija 3D ispisa, već se upotrebljava u medicini za ispis proteza i kostiju, i trenutno se radi na razvoju bio kompatibilnih...
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Numerička analiza debelostjenih cijevi kod naglog povećanja tlaka
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Matija Novak Debelostjene cijevi imaju široku primjenu u strojarstvu, između ostalog i u ispitivanjima eksploziva. Prilikom eksplozije, tlak u cijevi odmah naraste na svoju maksimalnu vrijednost i nakon toga u određenom vremenu padne na nultu vrijednost. Zbog nagle promjene tlaka, koja ovisi o vremenu, statička analiza ne može dobro opisati ponašanje cijevi te je potrebno napraviti dinamičku analizu.
Najprije je napravljena verifikacija na jednostavnijem primjeru na kojem se može odrediti...
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Numerička analiza dinamičkog ponašanja prostornog RRR manipulatora
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Dominik Filipčić Ovaj diplomski rad bavi se izvodom kinematskog i dinamičkog modela RRR manipulatora. Izvedena je dinamicka jednadzba i jednadzba gibanja manipulatora, koja se pomocu unesenih pocetnih uvjeta precizno definira. Za zadanu pocetnu i krajnju tocku program racuna putanju prihvatnice, koja u kombinaciji sa zadanim duljinama i masama dijelova manipulatora crta dijagrame torzijskih momenata potrebnih za konstrukciju robota.
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