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View new features for Radioss 2026.
Radioss Overview
Radioss is a leading explicit finite element solver for crash and impact simulation.
Tutorials
Discover Radioss functionality with interactive tutorials.
Radioss User Guide
This manual provides details on the features, functionality, and simulation methods available in Altair Radioss.
Radioss Reference Guide
This manual provides a detailed list of all the input keywords and options available in Radioss.
Radioss Example Guide
This manual presents examples solved using Radioss with regard to common problem types.
Radioss Verification Problems
This manual presents solved verification models.
- Elements
- Contact
- Materials
- Loads
- FSI
- Blast
  - RD-V: 0500 Shyue Shock Tube (JWL EOS)
    A 1D shock tube filled with detonation gas products is used as a test model for the JWL equation of state.
  - RD-V: 0505 Shock Tube
    The transitory response of a perfect gas in a long tube separated into two parts using a diaphragm is studied. The problem is well-known as the Riemann problem. The numerical results based on the finite element method with the Lagrangian and Eulerian formulations, are compared to the analytical solution.
  - RD-V: 0510 Prandtl-Meyer Expansion Fan
    An expansion wave appears in a supersonic flow as it turns around a convex corner.
  - RD-V: 0520 Double Oblique Shock
    A supersonic flow encounters two successive wedges and oblique shock are formed.
  - RD-V: 0530 Wave Propagation
    A sinusoidal imposed displacement is applied to a hollow sphere to study wave propagation.
  - RD-V: 0540 Free Air Burst
    Evaluation of the /LOAD/PBLAST option for free air burst blast waves. This analysis focuses on evaluating the /LOAD/PBLAST keyword by comparing Radioss results with experimental data on free-air bursts (Exp_data = 1).
  - RD-V: 0550 Surface Burst
    Evaluation of the /LOAD/PBLAST option for surface burst blast waves. This analysis focuses on evaluating the /LOAD/PBLAST keyword by comparing Radioss results with surface burst experimental data (Exp_data = 2).
  - RD-V: 0560 Air Burst
    Evaluation of the /LOAD/PBLAST option for air burst blast waves. This analysis focuses on evaluating the /LOAD/PBLAST keyword by comparing Radioss results with surface burst experimental data (Exp_data = 3).
- Tools
- Failure
- General Controls
- Equation of State
Radioss Frequently Asked Questions
This section provides quick responses to typical and frequently asked questions regarding Radioss.
Radioss Theory Manual
This manual provides detailed information about the theory used in the Altair Radioss Solver.
Radioss User Subroutines
This manual describes the interface between Altair Radioss and user subroutines.

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