Few freeware FE programs offer the capabilities to include 3D finite deformation inelastic continuum analysis; those that do are typically expressed in tens of thousands of lines. This paper offers for the first time compact MATLAB scripts forming a complete finite deformation elasto–plastic FE program. The key modifications required to an infinitesimal FE program in order to include geometric non–linearity are described and the entire code given.
Coombs, W., Crouch, R., & Augarde, C. (2010). 70-line 3D finite deformation elastoplastic finite-element code. In B. T., & N. S. (Eds.), Numerical methods in geotechnical engineering : proceedings of the seventh european conference on numerical methods in geotechnical engineering, Trondheim, Norway, 2-4 June 2010 (151-156). https://doi.org/10.1201/b10551-28