Ansys LS-DYNA ®
Ansys LS-DYNA is the industry leading 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 to solve complex, real-world problems. Its applications include drop tests, impact and penetration, smashes and crashes, occupant safety, and more.
Benefit from the additional features and capabilities of the Oasys Suite, a powerful software ecosystem designed to empower engineers using Ansys LS-DYNA.
NVH/Frequency Domain
Ansys LS-DYNA offers frequency domain analysis capabilities including:
- Frequency response function
- Steady state dynamics
- Random vibration
- Acoustic BEM and FEM
- Response spectrum analysis
- Fatigue SSD and random vibration
You can use these capabilities for applications such as NVH, acoustic analysis, fatigue analysis and earthquake engineering.
Composites
Composite materials can be modelled using a combination of specialist material models and ply material angle data. Varying material definitions and material angles can be specified through the thickness of the component, and ply failure can be included in the material definition.
- Material models can simulate intralaminar failure mechanisms (fibre and matrix failure).
- Use of tiebreak contacts or cohesive elements to simulate interlaminar failure (delaminations).
- Layered shell elements for modelling ply layup
- Uniaxial and bidirectional fabric material models
- Detailed output on the different failure modes
Crashworthiness
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 advanced connection modelling.
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Case Studies
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Simplifying design processes: Using simulation to maintain a competitive edge in tanker manufacturing
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Game-changing redesign to floating solar panels supports sustainable food production across Northern Europe
Features & capabilities
Drop testing
Ansys LS-DYNA can be used to simulate impact events, 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
Manufacturing processes
Ansys LS-DYNA can be used to model and analyse manufacturing processes and assess proposed metal forming processes and tool design. Along with the forming process users can simulate trimming and springback. Supported processes 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
Ansys LS-DYNA can be used to simulate high energy events making it well suited for blast and high velocity impact events like bird strikes on aircraft structures, air blasts, buried explosive charges and blast loads on structures. Methods include:
– Continuum-based smooth particle hydrodynamics (SPH) and Arbitrary Lagrangian Eulerian (ALE) formulation to accurately simulate large deformations and complex fluid structure interactions (FSI) during high velocity impact events
– Combine pressure time history data taken from external tests
iCFD for incompressible fluid
The incompressible computational fluid dynamics solver (iCFD) can be used to simulate fluid flow and fluid-structure interactions involving incompressible fluids. The stand-alone CFD code includes a steady-state solver, transient solver, turbulence model for RANS/LES, free surface flows and isotropic/anisotropic porous media flow. This can be coupled to structural, EM solver, and thermal solver.
Battery modelling using the Electromagnetics (EM) solver
As the automotive industry moves towards electrification, new demands are placed on simulation software to help designers and engineers create battery systems that integrate efficiently and safely within the vehicle structure. Advanced features are available in Ansys LS-DYNA electromagnetics (EM) solver to model the electromagnetic phenomena at cell level, via the Randles circuit capabilities. These capabilities can be used to address many of the load cases required by the battery regulations including mechanical shock, mechanical integrity, thermal shock, and random vibration.
Discover more
Find out how the Oasys LS-DYNA Environment is supporting users in key industries