Some updates to the demo of FEA extruder, adding plasticity in beams
Some updates to the demo of FEA extruder, adding plasticity in beams

rserban/chrono,projectchrono/chrono,dariomangoni/chrono,armanpazouki/chrono,dariomangoni/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,dariomangoni/chrono,armanpazouki/chrono,Milad-Rakhsha/chrono,dariomangoni/chrono,projectchrono/chrono,rserban/chrono,projectchrono/chrono,dariomangoni/chrono,rserban/chrono,dariomangoni/chrono,rserban/chrono,projectchrono/chrono,projectchrono/chrono,rserban/chrono,rserban/chrono,armanpazouki/chrono,armanpazouki/chrono,rserban/chrono,armanpazouki/chrono