magistrsko delo
Martin Amon (Author), Zoran Ren (Mentor), Matej Borovinšek (Co-mentor)

Abstract

Ojačani polimeri postajajo vodilni materiali na vseh področjih industrije, kjer je potreba po več serijskih izdelkih, ki hkrati zagotavljajo relativno veliko trdnost, majhno maso in nizko ceno. Zaradi številne uporabe omenjenih materialov v industriji ti vse bolj postajajo predmet inženirske obravnave. Za ojačane polimere je napoved mehanskih lastnosti zapletena zaradi dejstva, da so elastične, plastične in porušitvene lastnosti kompozitnega izdelka zaradi orientacije ojačitvenih vlaken izrazito anizotropne. Magistrsko delo tako obravnava različne metode modeliranja ojačanih polimerov za napoved njihovih trdnostnih lastnosti in se s tako pridobljenimi rezultati skuša najbolje približati realnim eksperimentalnim rezultatom. Obravnavane so poenostavljene metode modeliranja brez upoštevanja materialne nelinearnosti in/ali materialne ortotropije, nato pa postopoma sledijo obravnave vse naprednejših metod modeliranja z upoštevanjem vse kompleksnejših materialnih modelov. Pri tem magistrsko delo nazorno navaja pomanjkljivosti posameznih metod modeliranja ter skuša njihove rezultate ustrezno ovrednotiti ali celo izboljšati. Kot glavna je obravnavana metoda preslikave nelinearnih ortotropnih materialnih podatkov na idealizirano mrežo končnih elementov za trdnostne simulacije. Pri tem je bilo ugotovljeno, da metoda odpravlja večino pomanjkljivosti predhodnih metod modeliranja ojačanih polimerov, rezultati takšne analize pa se ob premišljeni mreži končnih elementov najbolje približajo eksperimentalnim rezultatom. Z vsemi ugotovitvami, pridobljenimi skozi potek dela, magistrsko delo podaja bogate izkušnje na področju modeliranja ojačanih polimerov. Na podlagi pridobljenih izkušenj lahko z veliko mero gotovosti napovedujemo in optimiramo mehanske lastnosti izdelkov, narejenih iz tovrstnih materialov. Magistrsko delo tako podaja pomembne napotke in izkušnje pri modeliranju in vrednotenju rezultatov računalniških simulacij ojačanih polimerov.

Keywords

ojačani polimeri;kompoziti;vlakna;računalniške simulacije;metoda končnih elementov;trdnostne simulacije;sumulacije brizganja;homogenizacija;interpolacijska preslikava;materialna nelinearnost;elasto-plastično;ortotropnost;Abaqus;Moldflow;magistrske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: [M. Amon]
UDC: 004.94:678.7.017(043.2)
COBISS: 18867990 Link will open in a new window
Views: 1497
Downloads: 180
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Other data

Secondary language: English
Secondary title: Computational modelling of fiber reinforced polymers with orthotropic material data mapping method
Secondary abstract: Reinforced polymers are becoming the leading materials in a variety of industries which require more of a series of products that ensure relatively high strength, small mass and low price. These materials allow for a variety of industrial uses, and are increasingly being studied by engineers. It is complicated to predict the mechanical characteristics of reinforced polymers, because the elastic, plastic and failure characteristics of the composite product are very anisotropic due to the orientation of the reinforcing fibers. The master thesis presents the different methods of modelling reinforced polymers in order to predict their mechanical properties and, with the obtained results, to come close, as far as possible, to real experimental results. Simplified methods of modelling are presented which do not take into consideration the material non-linearity and/or material orthotrophy. This is followed by presentations of advanced methods of modelling which take into consideration more complex material models. The master thesis clearly presents the disadvantages of certain modelling methods and attempts to evaluate or even improve their results. The main focus of the master thesis is to present the method of mapping non-linear orthotropic material data onto idealised finite elements mesh structural simulations. In doing so, it was established that the method removes the majority of deficiencies of previous methods of modelling reinforced polymers. With a well thought out finite elements mesh, the results of such an analysis come closest to experimental results. With the findings obtained through the work process, the master thesis presents the rich experiences in the field of modelling of reinforced polymers. Based on the obtained experiences, we can predict with great certainty and optimise the mechanic characteristics of products manufactured from such materials. The master thesis thus presents important instructions, advice and experiences in the field of modelling and evaluation of results of computer simulations of reinforced polymers.
Secondary keywords: reinforced polymers;composites;fibers;computer simulations;final element method;structural simulation;injection molding simulation;homogenisation;mapping;material non-linearity;elasto-plasticity;orthotrophy;Abaqus;Moldflow;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za strojništvo
Pages: VI, 105 str.
ID: 8757163