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Explicit Simulation with LS-DYNA

LS-DYNA can be used to determine how structures behave over a certain period of time when subjected to time-dependent loads.  LS-DYNA is offered by CADFEM as a version integrated into ANSYS Workbench. 

LS-DYNA in ANSYS Workbench

The seamless integration of LS-DYNA into ANSYS Workbench with associative CAD connection allows explicit calculations in a parametric work process and speeds up both the calculation of the variants as well as the optimization.

Front crash simulation of a Toyota Yaris against a deformable barrier according to EU frontal impact protection ECE R94 (source: National Crash Analysis Center (NCAC) of The George Washington University).


Automotive Industry

LS-DYNA is widely used in crash simulation to analyze the behavior of vehicles and their substructures as well as dummies during an accident - for example with passenger cars, commercial vehicles, ships or aircraft. One of the most intensive users is the automotive industry. In addition to vehicle crashes, there is also the detailed calculation of safety-relevant components, the active and passive vehicle safety as well as occupant and pedestrian protection in the center.

Making a crimp connection between a plug and the strands of a cable. Analysis of the forming forces, the material load and the resulting contact pressure (source: Tyco Electronics).


Metal Forming

LS-DYNA is often used in material processing for the simulation of processes such as forging, thermoforming or punching. The analysis in the case of metal forming processes goes beyond the pure forming process and includes, for example, creasing or crack formation as well as optimization approaches with regard to surface properties or reformation.



Falling test of a partially water-filled barrel, the liquid being described in a moving Euler's space and interacting directly with the Lagrange elements of the barrel. 


Fall Tests

Simulated drop tests also belong to the application spectrum of LS-DYNA. A wide range of impacts can be simulated in a wide variety of industrial and consumer goods - whether Castor containers, mobile phones, washing machines, thermal imaging cameras or water barrels (see video). Apart from the fact that this eliminates the time and costs for the creation of prototypes, simulated case tests convince by a detailed analysis and the fast repeatability under changed conditions.

Production of a spiral spring: Driven by four rollers, a steel wire is bent into the form of a spiral spring. Analysis of the kinematics with changed tool positions, material loading and tool wear. 


Other Fields of Application

LS-DYNA can support development processes where nonlinearities and dynamics are of great relevance, for example when simulating explosions or earth impacts. Further fields of application are analyzes of the dielectric strength of mechanical shielding (containment) and explosion protection in turbines, machine tools, safety equipment and large transformers as well as failure analysis of mechanical structures such as machines, buildings and plants.  


LS-DYNA offers special functionalities, eg for the automotive sector (features for modeling safety belts, airbags, dummies and seatbelt pretensioners) as well as metal forming (adaptive meshing, special contact formulations).

Thanks to explicit solution technology at a tremendous speed, including massive parallelization and high robustness in complex tasks, you get quick answers to your questions.

Through a comprehensive library of more than 130 material models for a variety of applications such as plasticity, tearing, shearing and punching, the real material behavior can be accurately imaged.

The model preparation can be shortened by application-specific functions such as belt tensioners or airbags.

Using advanced simulation techniques such as net-free methods such as Smooth Particle Hydrodynamics (SPH) or Element-free Galerkin Method (EFG), you can see the strongest deformations and distortions.

Using additional tools such as LS-PREPOST and LS-OPT as well as the possibility to input and output in ASCII format, you use a command-based simulation process with high flexibility.

The seamless integration into ANSYS Workbench with associative CAD connection allows explicit calculations in a parametric work process and accelerates both the calculation of the variants as well as the optimization.

The intuitive user interface is fast to learn and easy to use.