\begin{tabular}{m{4.5cm}||m{0.5cm}|m{0.5cm}|m{0.5cm}|m{0.5cm}|m{0.5cm}|m{0.5cm}}
\hline
     & $K_{\sigma_{11}}$ 
     & $K_{\sigma_{22}}$ 
     & $K_{\sigma_{33}}$ 
     & $K_{\sigma_{12}}$ 
     & $K_{\sigma_{13}}$ 
     & $K_{\sigma_{23}}$ \\
\hline
\hline
  Разрыв волокна основы & 
  $\frac{1.38}{1.17}$ & 
  $\bf\frac{3.90}{3.18}$ & 
  $\frac{1.71}{2.29}$ & 
  $\frac{1.07}{0.91}$ & 
  $\frac{1.62}{1.65}$ & 
  $\frac{1.07}{1.38}$ \\
\hline
  Разрыв волокон основы и утка & 
  $\frac{1.32}{1.47}$ & 
  $\bf\frac{4.16}{2.48}$ & 
  $\frac{1.85}{1.80}$ & 
  $\frac{1.16}{0.97}$ & 
  $\frac{1.64}{1.47}$ & 
  $\frac{2.27}{1.34}$ \\
\hline
\end{tabular}