To reproduce the plots as given in the paper 'Three-dimensional stress analysis for beam-like structures using Serendipity Lagrange shape functions' 

there are two excel files Square section and T-section. All the data points required to reproduce the plots are available in different sheets within these files.

Note: 
All results are in SI units
Length (displacment) - m
Stress - Pa (N/sq. m)

as given in the article.