If you want to start to work with Abaqus2Matlab, I recomend you to read our last paper:
G. Papazafeiropoulos, M. Muñiz-Calvente, E. Martínez-Pañeda. Abaqus2Matlab: a suitable tool for finite element post-processing.Advances in Engineering Software. Vol 105. March 2017. Pages 9-16. (2017)DOI:10.1016/j.advengsoft.2017.01.006