[Tex/LaTex] How to achieve this chapter style without using the memoir class

Question

As fncychap has no such chapter style, and using the memoir class will cause a lot conflicts with my current settings (book class), how to make this style (perhaps using the titlesec package)?

Table of contents and Chapter style:

and

Here are my setting for chapters:

\usepackage[ ]{titlesec}  
\titleformat{\chapter}[display]
{\normalfont\LARGE\bfseries }{\chaptertitlename\  \thechapter}{10pt}{\huge}
\titlespacing*{\chapter}{0pt}{40pt}{40pt}  % left, vertical, skip

Answer 1

Here's a way with titlesec; I also used microtype for spacing the small caps.

\documentclass{book}
\usepackage{titlesec,microtype}

\titleformat{\chapter}[display]
 {\normalfont\normalsize\scshape}
 {\makebox[\textwidth]{\titlerule[0.8ex]\quad\textls{\chaptername}\ \thechapter\quad\titlerule[0.8ex]}}
 {1ex}
 {\titlerule\vspace{1ex}\centering\huge\textls[50]}
 [\titlerule]

\titleformat{name=\chapter,numberless}[display]
 {\normalfont\normalsize\scshape}
 {\makebox[\textwidth]{\titlerule[0.8ex]}}
 {1ex}
 {\titlerule\vspace{1ex}\centering\huge\textls[50]}
 [\titlerule]

\begin{document}

\chapter*{Contents}

\chapter{FETCH Automated Verification and Validation}

\end{document}