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Niko Vujic
2025-08-23 15:00:43 +02:00
parent 35d7dec29a
commit 226f805f4e
11 changed files with 189 additions and 138 deletions
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radno/ispitivanje_cvrstoce_fdm_3d_printanog_uzorka.aux
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radno/ispitivanje_cvrstoce_fdm_3d_printanog_uzorka.blg
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@@ -1103,6 +1103,7 @@ Charpy unnotched [kJ/m$^2$] & 23 °C & 10.4 \\ \
\end{tabular}
\end{table}
\newpage
\subsection{Postav za ispitivanje smične čvrstoće}\label{subsec:postav_za_ispitivanje_smicne_cvrstoce}
%---- → UBACITI DIO SA JIGOM ZA SMIK
Pošto je jedini dostupni stroj za ispitivanje čvrstoće univerzalna kidalica, ispitivanje smične čvrstoće biti će izvedeno uzorkom s V-utorom na linearnim vodilicama.
@@ -1113,17 +1114,33 @@ smično naprezanje.\\
\begin{figure}[H]
\centering
\includegraphics[width=0.7\textwidth]{media/imgs/planiranje_eksperimenta/naprava_smik.jpg}
\includegraphics[width=0.8\textwidth]{media/imgs/planiranje_eksperimenta/naprava_smik.jpg}
\caption{Prikaz naprave za smično opterečenje epruvete}
\label{fig:naprava_smik}
\end{figure}
\begin{flushleft}
Pošto obrada odvajanjem čestica nije dostupna na korištenje u ovom radu, naprava će biti izrađena metodom FDM 3D printanja. Iz istog je razloga potrebno voditi
računa o čvrstoći iste kako ne bi došlo do deformacije naprave u razini u kojoj bi dovela točnost mjerenja pomaka u ispitnom uzorka u pitanje.\\
računa o čvrstoći iste kako ne bi došlo do deformacije naprave u razini u kojoj bi dovela točnost mjerenja pomaka u ispitnom uzorka u pitanje. Na slici
\ref{fig:naprava_smik_sliceano} prikazana je naprava u presjeku, te pripremljena za ispis. Vodilo se računa o tome da slojevi stijenke kritičnog presjeka (stup
na koji se prihvaća ispitni uzorak budu opterećeni na vlak (najpovoljnije), te se broj slojeva stijenke povećao na 15. Ispuna je postavljena na 90\%, te je odabrana
3D vrsta ispune "Gyroid".\\
\end{flushleft}
\begin{figure}[H]
\centering
\includegraphics[width=0.8\textwidth]{media/imgs/planiranje_eksperimenta/naprava_smik_sliceano.jpg}
\caption{Prikaz naprave za smično opterečenje epruvete, pripremljene za ispis, u presjeku}
\label{fig:naprava_smik_sliceano}
\end{figure}
Vodilice su napravljene od dosjednih aluminijskih cijevi, od kojih je čahura napravljena od cijevi $\O 12\mathrm{mm}$ debljine stijenke 1mm, te je
vodilica napravljena od aluminijske cijevi $\O 10\mathrm{mm}$ debljine stijenke također 1mm. Čahura je uprešana u plastični nosač na hladno, te je
osigurana samo steznim spojem.
\pagebreak
\section{Provedba eksperimenta}\label{sec:provedba_eksperimenta}
@@ -1168,23 +1185,27 @@ Na slikama \ref{fig:promjena_povrsine_10x10}, \ref{fig:promjena_povrsine_10x70}
\end{flushleft}
\newpage
\begin{figure}[H]
\centering
\includegraphics[width=0.6\textwidth]{media/imgs/analiza_podataka/promjena_povrsine_10x10.jpg}
\caption{Promjena površine po X i Y osi za bazu 10x10mm.}
\caption{Promjena površine po X i Y osi za presjek na slici \ref{fig:vlak_2d_stojeci}.}
\label{fig:promjena_povrsine_10x10}
\end{figure}
\begin{figure}[H]
\centering
\includegraphics[width=0.6\textwidth]{media/imgs/analiza_podataka/promjena_povrsine_10x70.jpg}
\caption{Promjena površine po X i Y osi za bazu 10x70mm.}
\caption{Promjena površine po X i Y osi za presjek na slici \ref{fig:vlak_2d_lezeci}.}
\label{fig:promjena_povrsine_10x70}
\end{figure}
\pagebreak
\begin{flushleft}
Za slučaj potrebe izračuna površine poprečnog presjeka u točnoj koordinati, moguć je upis zasebne visine na x i y osi, te je nakon izvršavanja programa ispisana i
površina u odnosu na te referentne osi u sljedećem formatu:\\
\end{flushleft}
\begin{verbatim}
==== Grid ispuna 30.0% ====
@@ -1202,9 +1223,11 @@ A_yz(x=-2mm) = 190.9887359198926 mm^2
\end{verbatim}
\begin{flushleft}
Uzevši u obzir da je Bambu Lab Slicer program otvorenog koda, matematički model i način generiranja mrežaste (Grid) ispune preuzet je iz istog, te prepisan iz
programskog jezika C++ u programski jezik Python, te dorađen za 2D prikaz. \\
Izračun površina i geometrijskih momenata presjeka proveden je pomoću vlastitog Python programa izvršavanog u JupyterLab okruženju (vidi Prilog A).
\end{flushleft}
%---------------------------------------------------------------------
%----------------------LITERATURA-------------------------------------

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