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FrontISTR is an open-source large-scale parallel finite element method structural analysis software. It provides analysis capabilities necessary for industrial and academic practical work, including nonlinear deformation stress, eigenvalue, frequency response, and heat conduction analyses with material nonlinearity, large deformation, and contact. The license is MIT License.

Official Website: https://www.frontistr.com
Official Documentation: https://manual.frontistr.com/en/ (English) / https://manual.frontistr.com/ja/ (Japanese)

Key Features

Large-scale Parallel: MPI (distributed memory) + OpenMP (shared memory)
Analysis Types
- Static analysis, dynamic analysis (implicit/explicit methods)
- Large deformation, contact, nonlinear materials (elastoplastic, hyperelastic, creep, viscoelastic, etc.)
- Eigenvalue analysis
- Frequency response analysis
- Heat conduction analysis (steady-state/transient)
Solvers: CG / BiCGSTAB / GMRES / GPBiCG / Direct methods (MUMPS / MKL PARDISO)
Preconditioners: SSOR / ILU(0) / AMG (Trilinos-ML), etc.
Element Library: 1st/2nd order solid (TET/PRISM/HEX), plane (triangular/quadrilateral), beam, shell, truss elements, etc.
Visualization: Compatible with ParaView and other tools

System Requirements & Dependencies

Compilers: C/C++/Fortran90 (GCC / Clang / Intel oneAPI, etc.)
Required Libraries for Parallel Computing
- MPI (Open MPI / MPICH, etc.)
- METIS (domain decomposition)
Optional Libraries
- BLAS/LAPACK (used in some features. OpenBLAS/MKL, etc.)
- MUMPS (parallel direct solver) + ScaLAPACK (required for MUMPS)
- Trilinos-ML (AMG preconditioning)
- Intel MKL (parallel direct solver with MKL PARDISO)

Build (CMake)

mkdir build && cd build
cmake ..
make -j$(nproc)

Execution

Single Domain (Thread Parallel)

# In the directory where input files are located

fistr1

Domain Decomposition (MPI Parallel)

hecmw_part1 # Mesh partitioning

mpirun -n 4 fistr1 # Execute with 4 parallel processes

Visualization & Pre/Post Processing

ParaView (VTK file)
REVOCAP_PrePost (mesh generation, preprocessing, execution integration)
FreeCAD FEM_FrontISTR (FrontISTR Workbench): https://github.com/FrontISTR/FEM_FrontISTR

Binary Distributions

Download site:
https://www.frontistr.com/download/

Contributing

Issues and Merge Requests (MR) are accepted on the GitLab side.
When proposing changes, please refer to CONTRIBUTING.md and various templates (issues, MR).

License

Main software: MIT License (see License.txt in the repository)
Integration libraries (METIS/MUMPS/Trilinos-ML/MKL, etc.) follow their respective licenses.

Acknowledgments

FrontISTR is continuously developed by a development community (FrontISTR Commons) consisting of universities, research institutions, and companies. We appreciate the support from related research and development projects (innovative simulation software, etc.).
The porting to the GPU was carried out with the support of the Information Technology Center, the University of Tokyo.