Install calculix-ccx by entering the following commands in the terminal:
sudo apt update sudo apt install calculix-ccx
Three-Dimensional Structural Finite Element Program
CalculiX is a free and open source finite element analysis application that uses a similar input format to Abaqus. It has an implicit and explicit solver and a pre and post processor (CGX). This package contains the solver CalculiX CrunchiX (cxx).