Analiza uporabnosti kompozitnih materialov za konstruiranje nosilnih elementov vozil pri povišanih temperaturah

Kranjc, Andraž

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Title:	Analiza uporabnosti kompozitnih materialov za konstruiranje nosilnih elementov vozil pri povišanih temperaturah
Authors:	ID Kranjc, Andraž (Author) ID Ren, Zoran (Mentor) More about this mentor...
Files:	MAG_Kranjc_Andraz_2016.pdf (4,53 MB) MD5: FD69E7658C15083ED616857410CD5F26
Language:	Slovenian
Work type:	Master's thesis/paper
Typology:	2.09 - Master's Thesis
Organization:	FS - Faculty of Mechanical Engineering
Abstract:	Polimeri, ojačani z ogljikovimi vlakni, so sodobni inženirski materiali. Zanima nas ali je implementacija raziskanega materiala primerna za vozila, kjer se pojavljajo raznolike obremenitve ter v veliki večini tudi povišana temperatura. Prednost ojačanih polimerov je majhna masa, relativno visoka trdnost in cena pri serijskih izdelkih. Poznavanje in napovedovanje njihovih mehanskih lastnosti je kompleksen proces zaradi, anizotropnih materialnih lastnosti. V magistrskem delu povzamemo teoretične osnove modeliranja in analiziranja tovrstnih materialov. Pripravili smo testne vzorce in jih natezno porušili pri sobni in povišani temperaturi. Materialne podatke, pridobljene pri sobni temperaturi, smo nato uporabili za določitev materialnega modela. Poleg mikroskopske analize vzorcev, opravimo še analizo povišane temperature, kar nam da splošno dober pregled nad materialom. Kasneje prikažemo pripravo numerične simulacije brizganja osnove ploščice, iz katere smo izrezali testne vzorce. Na podlagi omenjene simulacije analiziramo napoved stopnje orientacije v brizganem izdelku. Nadaljujemo z nastavitvijo trdnostne simulacije ter generiranje in preslikavo nelinearnih ortotropnih materialnih podatkov. Orientacijo vlaken prenesemo v trdnostno analizo in s tem prikažemo način modeliranja tovrstnih materialov. Na podlagi celotnega opravljenega dela analiziramo rezultate ter potrdimo oziroma ovržemo hipotezo. Magistrsko delo je zastavljeno kot osnova in priročnik za daljne raziskave s tega področja. Podaja pomembne in koristne informacije, poleg tega pa podaja bogate izkušnje iz področja kompozitnih materialov.
Keywords:	kompoziti, vlakna, polimeri, ojačani kompoziti, natezni preizkus, natezni preizkus pri povišani temperaturi, simulacija brizganja, metoda končnih elementov, preslikava materialnega modela, ortotropni materialni model, Abaqus, Moldflow, Advanced Material Exchange.
Place of publishing:	Maribor
Publisher:	[A. Kranjc]
Year of publishing:	2016
PID:	20.500.12556/DKUM-62127
UDC:	620.168+004.94(043.2)
COBISS.SI-ID:	20214038
NUK URN:	URN:SI:UM:DK:RKDYKY32
Publication date in DKUM:	14.09.2016
Views:	1624
Downloads:	82
Metadata:
Categories:	KTFMB - FS
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Secondary language

Language:	English
Title:	Fit for purpose analysis of composite materials for design of vehicle load bearing elements at elevated temperatures
Abstract:	Polymers reinforced with carbon fibers are modern engineering materials. In this master's degree we are interested in the implementation of the investigated material on vehicles where there are a variety of loads and a lot of times even heat. The advantages of reinforced polymers are low weight, relative high strength and relative price in serial production. Knowing and predicting their mechanical properties is a complex process due to anisotropic material properties. In this thesis we summarized the theoretical fundamentals of modeling and analyzing such materials. We prepared the test samples, and tested them at room and elevated temperatures. Material data obtained at room temperature were then used to determine the material model. In addition to the microscopic analysis of samples we also performed the analysis of elevated temperature, which give us a good general overview of the material. Later we show the preparation of a numerical simulation of the injection molding of the base plate from which we cut out of the test samples. Based on these simulation we analyzed the level of orientation in the molded product. Proceed by setting the strength simulation, and generating and mapping nonlinear orthotropic material model. We transfer the orientation of the fibers in to our strength analysis and thus show a way of modeling and analyzing such materials. On the basis of the total work performed we analyze the results and confirm or disprove the hypothesis. Master's thesis is conceived as a basis and guide for further research in this field. It specifies relevant and useful information, in addition, it provides a lot of experience in the field of composite materials.
Keywords:	composites, fibers, polymers, reinforced composites, tensile test, tensile test at elevated temperatures, injection molding simulation, finite element method, mapping material model, orthotropic material model Abaqus, Moldflow, Advanced Material Exchange

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