Merge pull request #1 from bliepp/playground

Playground

presentation/index.tex

@@ -4,8 +4,8 @@
 \title[MD simulation of SLM]{Molecular dynamics simulation of selective laser melting}
 \subtitle{
 	%Molekulardynamische Simulation von selektivem Laserschmelzen\\
-	%Bachelor thesis\\
-	Supervisor: Dominic Klein}
+	Supervisor: Dominic Klein\\
+	Bachelor thesis}
 \author{Fabio Oelschläger}
 \date{July 21, 2021}
 

presentation/presentation.cls

@@ -60,10 +60,17 @@
 \definecolor{darkblue}{HTML}{3B3BC4}
 \definecolor{verylightgrey}{HTML}{DDDDDD}
 
+% graphical stuff
+\renewcommand{\arraystretch}{1.8}
+
 %% structural stuff
 \let\oldcolumns\columns
 \def\columns{\vspace{-\baselineskip}\oldcolumns[onlytextwidth]}
 
+%% units
+\newcommand{\powerunit}[1][]{\ensuremath{#1\,\frac{\si{\electronvolt}}{\SI{10.18}{fs}}}}
+\newcommand{\timeunit}{\ensuremath{\,\SI{10.18}{fs}}}
+
 %% infinitesimal elements
 \newcommand{\dinf}{\ensuremath{\text{d}}}
 \newcommand{\dx}[1][x]{\ensuremath{\dinf #1}}

presentation/sections/introduction.tex

@@ -111,15 +111,15 @@ \subsection{Additive manifacturing}
 \end{frame}
 
 
-\begin{frame}{Defects in SLM - Keyhole effect}
-	\visible<2->{
-	\begin{figure}
-		\centering
-		\includegraphics[width=0.5\textwidth]{theory/img/defects/keyhole.png}
-		\caption{Defect due to occurence of keyhole effect \cite{eskandarisabzi2019defect}.}
-	\end{figure}
-	}
-\end{frame}
+% \begin{frame}{Defects in SLM - Keyhole effect}
+% 	\visible<2->{
+% 	\begin{figure}
+% 		\centering
+% 		\includegraphics[width=0.5\textwidth]{theory/img/defects/keyhole.png}
+% 		\caption{Defect due to occurence of keyhole effect \cite{eskandarisabzi2019defect}.}
+% 	\end{figure}
+% 	}
+% \end{frame}
 
 
 \begin{frame}{Parameters}
@@ -269,8 +269,3 @@ \subsection{Additive manifacturing}
 		\end{align}
 	\end{itemize}
 \end{frame}
-
-
-\begin{frame}{Necessary approximations}
-	\missing Simulation goes approximately brrrr.
-\end{frame}

presentation/sections/single.tex

@@ -6,22 +6,149 @@ \section{Reference model and results}
 
 \subsection{Creating a spherical sample}
 \begin{frame}{Creating a spherical sample}
-	\missing
+\begin{columns}
+	\begin{column}{0.75\textwidth}
+		\begin{itemize}[<+->]
+			\item Sample usually cuboid with periodic boundary conditions (PBC)
+			\item What we want: Sphere under influence of gravity
+			\item Strategy:
+			\begin{enumerate}
+				\item Equilibration and heating of an arbitrary cuboid sample
+				\item Cut out sphere (spacing!) + ground
+				\item Make the ground fixed
+				\item Continue equilibration under influence of gravity
+			\end{enumerate}
+			\vspace{1cm}
+			\item Diameter $\sim \SI{400}{\angstrom}$ vs. a few \si{\micro\meter} in reality
+			\item Motivated by work of \cite{glosli2007extending}
+		\end{itemize}
+	\end{column}
+	\begin{column}{0.25\textwidth}
+		\vspace{-1.35\baselineskip}
+		\visible<8->{
+		\begin{figure}
+			\centering
+			\includegraphics[width=0.85\textwidth]{single/img/equilibration/sphere_zoom_vertical.png}
+			\vspace{-0.6\baselineskip}
+			\caption{Fully equilibrated aluminium sphere (green) on ground (red).}
+		\end{figure}
+		}
+	\end{column}
+\end{columns}
 \end{frame}
 
 
-\begin{frame}{Equilibrating the sample}
-	\missing
+\subsection{Influence of the laser power}
+\begin{frame}{Influence of the laser power - Setup}
+	\begin{itemize}[<+->]
+		\item Calibrating the laser power at given scanning speed % needed to melt the sample completely
+		\item Picking a scanning speed
+		\begin{itemize}
+			\item Can be arbitrary
+			\item Reasonable time for laser to pass simulation box
+			\item[$\Rightarrow$] \SI{10}{\angstrom} per simulation time unit
+		\end{itemize}
+		\item Repeat same simulation for various laser powers
+	\end{itemize}
+	\vspace{2cm}
+	\onslide<+->{Measure for melting rate: Common Neighbor Analysis (CNA)}
 \end{frame}
 
 
-\subsection{Influence of the laser's power}
-\begin{frame}{Influence of the laser's power}
-	\missing
+\begin{frame}{Influence of the laser power - Results}
+\begin{columns}
+	\begin{column}{0.5\textwidth}
+		\visible<2->{
+		\begin{figure}
+			\centering
+			\captionsetup{justification=centering}
+			\includegraphics[width=\textwidth]{single/plt/power_calibration/cna_vel10_start_en.eps}
+			\caption{short-term development}
+		\end{figure}
+		}
+	\end{column}
+	\begin{column}{0.5\textwidth}
+		\visible<3->{
+		\begin{figure}
+			\centering
+			\captionsetup{justification=centering}
+			\includegraphics[width=0.815\textwidth]{single/img/power_calibration/v10_p160_c420_perspective.png}
+			\includegraphics[width=0.815\textwidth]{single/img/power_calibration/v10_p160_c420_side_cropped.png}
+			\caption{For $P = \SI{160}{\electronvolt}/\SI{10.81}{fs}$ after 21000 time units.}
+		\end{figure}
+		}
+	\end{column}
+\end{columns}
 \end{frame}
 
 
+\begin{frame}{Influence of the laser power - Results}
+	\begin{figure}
+		\centering
+		\captionsetup{justification=centering}
+		\includegraphics[width=0.5\textwidth]{single/plt/power_calibration/cna_vel10_rate_en.eps}
+		\caption{long-term development}
+	\end{figure}
+\end{frame}
+
+
+\begin{frame}{Influence of the laser power - Results}
+\begin{columns}
+	\begin{column}{0.5\textwidth}
+		\onslide<+->{
+		\begin{figure}
+			\centering
+			\captionsetup{justification=centering}
+			\includegraphics[width=0.95\textwidth]{single/img/power_calibration/v10_p100_c225.png}
+			\caption{Cut-through after 11250 time units at $P = \SI{100}{\electronvolt}/\SI{10.81}{fs}$.}
+		\end{figure}
+		}
+	\end{column}
+	\begin{column}{0.5\textwidth}
+		\onslide<+->{
+		\begin{figure}
+			\centering
+			\captionsetup{justification=centering}
+			\includegraphics[width=0.95\textwidth]{single/img/power_calibration/v10_p100_c280.png}
+			\caption{Cut-through after 14000 time units at $P = \SI{100}{\electronvolt}/\SI{10.81}{fs}$.}
+		\end{figure}
+		}
+	\end{column}
+\end{columns}
+\end{frame}
+
+
+\subsection{Cutting the scanning speed in half}
+\begin{frame}{Cutting the scanning speed in half - Finding a matching pair}
+	\begin{figure}
+		\centering
+		\captionsetup{justification=centering}
+		\includegraphics[width=0.5\textwidth]{single/plt/power_calibration/cna_vel5_start_en.eps}
+		\caption{Comparison of various velocity-power pairs.}
+	\end{figure}
+\end{frame}
+
 \subsection{Cutting the scanning speed in half}
-\begin{frame}{Cutting the scanning speed in half}
-	\missing
+\begin{frame}{Cutting the scanning speed in half - Comparison}
+\vspace{-1.1\baselineskip}
+\begin{columns}
+	\begin{column}{0.5\textwidth}
+		\begin{figure}
+			\centering
+			\captionsetup{justification=centering}
+			\includegraphics[width=0.58\textwidth]{single/img/power_calibration/v10_p80_t1250.png}
+			\includegraphics[width=0.58\textwidth]{single/img/power_calibration/v5_p50_t1250.png}
+			\caption{Snapshot at 1250 time units.\\Top: $v = \SI{10}{\angstrom \per \timeunit}$. Bottom: $v = \SI{5}{\angstrom \per \timeunit}$}
+		\end{figure}
+	\end{column}
+	\begin{column}{0.5\textwidth}
+		\begin{figure}
+			\centering
+			\captionsetup{justification=centering}
+			\includegraphics[width=0.58\textwidth]{single/img/power_calibration/v10_p80_t3000.png}
+			\includegraphics[width=0.58\textwidth]{single/img/power_calibration/v5_p50_t3000.png}
+			\caption{Snapshot at 3000 time units.\\Top: $P = \SI{80}{\electronvolt}/\SI{10.81}{fs}$. Bottom: $P = \SI{50}{\electronvolt}/\SI{10.81}{fs}$}
+		\end{figure}
+	\end{column}
+\end{columns}
 \end{frame}

presentation/sections/summary.tex

@@ -1,15 +1,50 @@
-\section[Summary]{Summary and Outlook}
+\section[Summary]{Summary, Limitations and Outlook}
 \subsection*{Outlook}
 \begin{frame}{Outline}
 	\tableofcontents[currentsection]
 \end{frame}
 
 
 \begin{frame}{Summary}
-	\missing
+	\begin{itemize}[<+->]
+		\item Additive manifacturing: layer by layer fabrication
+		\item SLM: Fusing metal powder with a laser
+		\item Quality (i.e. defects count, defect size, accuracy, etc.) highly influenced by different parameters
+		\item Atomistic simulation using MD of a downscaled system
+		\item Simulation gives hint on known mechanisms (e.g. porosities)
+		\item Model has some problems to be solved
+		\vspace{1cm}
+		\item[$\Rightarrow$] In principle suitable for this problem
+	\end{itemize}
 \end{frame}
 
 
-\begin{frame}{Outlook}
-	\missing
+\begin{frame}{Limitations and Outlook}
+	\begin{itemize}[<+->]
+		\item In reality not pure aluminium in vacuum
+		\item Not a complete model (yet)
+		\begin{itemize}
+			\item surrounding gas (e.g. argon)
+			\item simulation of active cooling
+		\end{itemize}
+		\item Still usable right now for specific aspects $\rightarrow$ different samples
+		\begin{itemize}
+			\item Row of multiple spheres
+			\item Stacked spheres
+			\item Spheres of different sizes
+			\item Making ground meltable
+			\item Classic: more atoms
+		\end{itemize}
+	\end{itemize}
+\end{frame}
+
+
+\section*{Additionial}
+\subsection*{Information}
+\begin{frame}{Slides and Thesis}
+	\vspace{2cm}
+	\begin{center}
+		You can find my thesis and these slides as a release on my GitHub:\\
+		\url{https://github.com/bliepp/bachelor-thesis}
+	\end{center}
 \end{frame}

thesis/chapter/main/single.tex

@@ -115,7 +115,7 @@ \section{Erstellung und Equilibrierung der Probe}
 
 		\begin{figure}[!ht]
 			\centering
-			\includegraphics[width=\textwidth]{chapter/main/single/img/equilibration/sphere.zoom.png}
+			\includegraphics[width=\textwidth]{chapter/main/single/img/equilibration/sphere_zoom.png}
 			\caption{Eine vollständig equilibrierte Kugel aus Aluminiumatomen (grün) auf einem
 			festen, unbeweglichen Untergrund (rot) vergrößert die Kontaktfläche unter dem eigenen
 			Gewicht}