LS-DYNA®, developed by Livermore Software Technology Corporation (LSTC), is a multi-purpose explicit and implicit finite element and multiphysics program used to analyse the nonlinear response of structures.
Its fully automated contact analysis and wide range of material models enable users worldwide to solve complex, real-world problems.
Occupant and Pedestrian Safety
High Velocity Impacts
Compressible Fluids Flow
Incompressible Fluids Flow
Explicit and Implicit Time Integration
Linear and Non-Linear Statics
Arbitrary Lagrange Eulerian (ALE)
Sophisticated Material Models
Complex Contact Conditions
Thermal Analysis & Thermostructural Coupling
Fluid Dynamics and Fluid Structure Interactions
Smooth Particle Hydrodynamics (SPH)
Element Free Galerkin (EFG)
Discrete Element Analysis
Frequency Domain Problems
For many automotive companies, LS-DYNA is a tool for understanding the deformation of complex systems such as vehicle structures. The ability of LS-DYNA to model contacts and its wide range of material models make it ideally suited for this type of analysis. It also includes a number of specific features for automotive applications such as airbags, accelerometers, and adhesive connection modelling.
LS-DYNA has been used to simulate impact events for many years, ranging from small electronic products such as mobile phones and laptop computers, to large nuclear fuel containers. Features include:
- Fluid Structure Coupling (ALE / SPH) for modelling liquid filled containers
- Element Free Galerkin (EFG) for modelling cracks
- Explicit–implicit switching for studying steady state deformation
LS-DYNA can be used to model and analyse manufacturing processes and to assess a proposed metal forming process and tool design. Along with the forming process users can simulate trimming and springback. Processes supported include:
- Deep Drawing and Springback
- Rolling, Pressing, Forging, Casting and Spinning
- Superplastic Forming
- Multi-stage Processes and Metal Cutting
- Roller Hemming and Profile Rolling
Blast and High Velocity Impact
LS-DYNA can be used for the simulation of high energy events making it well suited to blast events. It is possible to simulate air blasts as well as buried explosive charges and blast loads on structures. Blast methods include:
- ConWep Analysis.
- Fluid–structure Interaction Analysis.
- Can also combine pressure time history data taken from external tests.
Frequency Domain Analysis
LS-DYNA offers frequency domain analysis capabilities including:
- Response Function
- Steady State Dynamics
- Random Vibration
- Acoustic Boundary Element Method
- Acoustic Finite Element Method
- Response Spectrum
- Fatigue Analysis
Composite materials can be modelled in LS-DYNA using a combination of specialist material models and ply material angle data. Varying material definition and material angle can be specified through the thickness of the component, and ply failure can be included in the material definition.
- Material models can simulate both fibre and matrix failure
- Layered shell elements for modelling ply layup
- Uniaxial and bidirectional fabric material models
- Detailed output on the different failure modes