LS-DYNA is a general-purpose finite elementprogram capable of simulating complex real world problems. It isused by the automobile, aerospace, construction, military,manufacturing, and bioengineering industries. LS-DYNA is optimizedfor shared and distributed memory Unix, Linux, and Windows based,platforms, and it is fully QA’d by LSTC. The code’s origins lie inhighly nonlinear, transient dynamic finite element analysis usingexplicit time integration.
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LS-DYNA consists of a single executable file and is entirelycommand line driven. Therefore all that is required to run LS-DYNAis a command shell, the executable, an input file, and enough freedisk space to run the calculation. All input files are in simpleASCII format and thus can be prepared using any text editor. Inputfiles can also be prepared with the aid of a graphicalpreprocessor.
There are many third party software products available forpreprocessing LS-DYNA input files. LSTC also develops its ownpreprocessor, LS-PrePost, which is freely distributed and runswithout a license. Licensees of LS-DYNA automatically have accessto all of the program’s capabilities, from simple linear staticmechanical analysis up to advanced thermal and flow solvingmethods. Furthermore, they have full use of LS-OPT, a standalonedesign optimization and probabilistic analysis package with aninterface to LS-DYNA.
Capabilities
LS-DYNA’s analysis capabilities include:
– Full 2D & 3D capabilities
– Nonlinear dynamics
– Rigid body dynamics
– Quasi-static simulations
– Normal modes
– Linear statics
– Thermal analysis
– Fluid analysis
– Eulerian capabilities
– ALE (Arbitrary Lagrangian-Eulerian)
– FSI (Fluid-Structure Interaction)
– Navier-Stokes fluids
– Compressible fluid solver, CESE (Conservation Element& Solution Element)
– FEM-rigid multi-body dynamics coupling (MADYMO, Cal3D)
– Underwater shock
– Failure analysis
– Crack propagation
– Real-time acoustics
– Implicit springback
– Multi-physics coupling
– Structural-thermal coupling
– Adaptive remeshing
– SPH (Smoothed Particle Hydrodynamics)
– EFG (Element Free Galerkin)
– Radiation transport
– EM (Electromagnetism)
Material Library
LS-DYNA’s material library includes:
– Metals
– Plastics
– Glass
– Foams
– Fabrics
– Elastomers
– Honeycombs
– Concrete & soils
– Viscous fluids
– User-defined materials
Element Library
LS-DYNA’s element library includes:
– Beams (standard, trusses, discrete, cables, and welds) (with over10 beam element formulations)
– Discrete Elements (springs and dampers)
– Lumped inertias
– Lumped masses
– Accelerometers
– Sensors
– Seatbelts
– Pretensioners
– Retractors
– Sliprings
– Shells (3, 4, 6, and 8-node including 3D shells, membranes, 2Dplane stress, plane strain, and axisymmetric solids) (with over 25shell element formulations)
– Solids (4 and 10-node tetrahedrons, 6-node pentahedrons, and8-node hexahedrons) (with over 20 solid element formulations)
– SPH Elements
– Thick Shells (8-node)
Contact Algorithms
LS-DYNA’s contact algorithms include:
– Flexible body contact
– Flexible body to rigid body contact
– Rigid body to rigid body contact
– Edge-to-edge contact
– Eroding contact
– Tied surfaces
– CAD surfaces
– Rigid walls
– Draw beads
I am facing problems regarding meshing of a solid geometry in LS Dyna software. I tried to mesh it with AUTO MESH command. But I am not sure whether it is shell meshing or solid meshing.
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