3D elastic Finite Element MATLAB code + Abaqus Verification

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I wrote a finite element code for three-dimensional analysis of elastic body using MATLAB programming language.
Here is a video of the results + its verification with Abaqus:

Output results are shown in Tecplot; hexahedron elements are used; Basic conjugate gradient method (BCG) is used to solve linear solutions to be able to solve large number of nodes and elements.
Contact me via email (hosseinali.sut@gmail.com) for MATLAB files (functions):
main.m
basicconjugategradientsolution.m
B.m
rNrkb.m

3D Large Deformation Finite Element Analysis using MATLAB Code

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Here is the MATLAB code for 3D FEM analysis of a large deformation problem.

Both Total and Updated Lagrangian Descriptions are programmed; Tetrahedron elements are used.
Do not hesitate to contact me via email (hosseinali.sut@gmail.com) for MATLAB files:
main.m
At.m
BL.m
Gtensor.m
Volume.m