Numerična analiza obremenjevanja kompozitov z gumeno matrico : magistrsko delo

Buh, Emil

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Title:	Numerična analiza obremenjevanja kompozitov z gumeno matrico : magistrsko delo
Authors:	ID Buh, Emil (Author) ID Kramberger, Janez (Mentor) More about this mentor... ID Donik, Žiga (Comentor)
Files:	MAG_Buh_Emil_2026.pdf (2,55 MB) MD5: 4645392742470491FE05481A9A145B53
Language:	Slovenian
Work type:	Master's thesis/paper
Typology:	2.09 - Master's Thesis
Organization:	FS - Faculty of Mechanical Engineering
Abstract:	Magistrsko delo obravnava numerično analizo mehanskega odziva kompozitnega materiala z gumeno matrico in najlonskimi ojačitvenimi vlakni pri kvazistatičnih nateznih obremenitvah. Izhodišče raziskave so eksperimentalni natezni preizkusi, izvedeni na posameznih fazah kompozita ter v dveh konfiguracijah kompozita z orientiranostjo vlaken pod različnimi koti in dveh debelinah preizkušanca. Na podlagi eksperimentalnih podatkov so bili določeni materialni parametri posameznih faz. Gumena matrica je bila opisana s hiperelastičnim materialnim modelom Blatz-Ko, ojačitvena najlonska vlakna pa z linearno elastičnim. Numerični model je bil razvit v programskem okolju ANSYS Mechanical APDL z uporabo volumskih elementov SOLID185 za matrico ter diskretnih ojačitvenih elementov REINF264 za vlakna vgrajena v matrico. Geometrija in računska mreža sta bili pripravljeni v programskem jeziku Python z uporabo knjižnice PyMAPDL. Primerjava simuliranih rezultatov z eksperimentalnimi podatki je pokazala, da se model z napako pod 20 % dobro ujema z eksperimentom pri deformaciji okoli 10 % za obe konfiguraciji in orientaciji vlaken. Ujemanje je boljše pri orientaciji 0°, kjer vlakna prevzamejo pretežni del obremenitve in je odziv pretežno linearen. Pri orientaciji 45° pride pri večjih deformacijah do izraza nelinearni prispevek gumene matrice, ki ga Blatz-Ko model opisuje manj natančno. Razvit numerični model predstavlja osnovo za nadaljnjo optimizacijo gumenih kompozitnih struktur ter odpira možnosti za zmanjšanje obsega eksperimentalnih testiranj pri razvoju novih aplikacij.
Keywords:	gumeni kompozit, najlonska vlakna, hiperelastičnost, Blatz-Ko model, metoda končnih elementov, ANSYS MAPDL, numerična simulacija
Place of publishing:	Maribor
Place of performance:	Maribor
Publisher:	[E. Buh]
Year of publishing:	2026
Number of pages:	1 spletni vir (1 datoteka PDF (XIV, 54 f.))
PID:	20.500.12556/DKUM-98060
UDC:	519.6:620.172(043.2)
COBISS.SI-ID:	280622339
Publication date in DKUM:	27.05.2026
Views:	236
Downloads:	24
Metadata:
Categories:	KTFMB - FS
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Licences

License:	CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Link:	http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:	The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:	12.05.2026

Secondary language

Language:	English
Title:	Numerical Stress Analysis of Rubber Matrix Composites
Abstract:	This master's thesis addresses the numerical analysis of the mechanical response of a composite material consisting of a rubber matrix reinforced with nylon fibers under quasi-static tensile loading. The research is based on experimental tensile tests performed on the individual composite phases, as well as on two composite configurations with different fiber orientations and two specimen thicknesses. Material parameters for each phase were determined from experimental data. The rubber matrix was described using the Blatz-Ko hyperelastic material model, while the nylon reinforcement fibers were modeled using a linear elastic model. The numerical model was developed in the ANSYS Mechanical APDL environment using SOLID185 solid elements for the matrix and discrete REINF264 reinforcement elements for the fibers embedded in the matrix. The geometry and computational mesh were prepared in the Python programming language using the PyMAPDL library. Comparison of the simulated results with experimental data showed that the model correlate well with the experiment within an error of 20 % at a deformation of approximately 10 % for both configurations and fiber orientations. Correlation is better for the 0° orientation, where the fibers carry the majority of the load and the response is predominantly linear. At 45° orientation, the nonlinear contribution of the rubber matrix becomes significant at larger deformations, which the Blatz-Ko model captures less accurately. The developed numerical model provides a foundation for further optimization of rubber composite structures and opens possibilities for reducing the extent of experimental testing in the development of new applications.
Keywords:	rubber composite, nylon fibers, hyperelasticity, Blatz-Ko model, finite element method, ANSYS MAPDL, numerical simulation

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