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Structural mechanics
Structural mechanics

Advanced Explicit Structural Mechanics with LS-DYNA

For dynamic engineers "simple" is just not good enough


Training Expert

In this training, you learn the best modeling options for explicit calculations with contact, non-linear materials, and failure. This training is offered as a 3-day course.

3 days

Basic knowledge of LS-Dyna

Software used
Ansys LS-Dyna

  • Learning comprehensive modeling options with LS-DYNA
  • Deciding which modeling is the best for which application
  • Increasing the accuracy, robustness, and efficiency of simulations
  • Opening up entirely new fields of application


Are you already using LS-DYNA, but want to get even more out of your simulations? Then this training is perfect for you. The course covers the topics of “robust and effective contact modeling,” “non-linear material behavior and failure modeling,” “modeling adhesive bonding technologies,” and “examining and evaluating explicit simulations”.

You will learn about the comprehensive modeling options offered by LS-DYNA and be able to decide which options are the most appropriate for your application. This will allow you to increase the accuracy, robustness, and efficiency of simulations and may help open up entirely new fields of application.

The training is aimed at simulation engineers with some initial experience of LS-DYNA and who now wish to dive deeper into explicit non-linear structural dynamics.

Detailed agenda for this 3-day training

Day 1

01 The diversity of contact types in LS-DYNA

  • The difference between nodes and surface options
  • The magical world of AUTOMATIC contacts
  • Handling shells and beams
  • Which options can be used for which contact types?
  • Recommendations for standard settings

02 Function and use of penalty- and constraint-based contacts

  • The theory and properties of penalty contacts
  • Optimal adjustment of contact stiffness and damping
  • Handling initial penetration, wanted and unwanted
  • When are constraint-based contacts a good idea?

03 Node or area-based contact search: when to choose what?

  • Symmetrical or asymmetrical contact, more is not always better
  • The efforts and benefits of SOFT2 and MORTAR contacts
  • Smoothing faceted contact surfaces
  • Contact with element failure
  • Considering and evaluating friction

04 Troubleshooting: when the contact doesn’t do what I want

  • Debugging options in Output
  • Displaying and interpreting contact results in the Interface Force file
  • Understanding contact energies
  • Finding the positions of contact bugs and rectifying the causes
  • Special contacts: Stonewalls, analytical contact bodies, and slide guides

Day 2

05 Permanent connections

  • Efficient model creation with TIED contacts
  • Contact selection for robust, reliable, accurate modeling
  • Penalty or constraint procedures
  • Avoiding overdeterminacy
  • Models with solids, shells, and beams

06 Adhesive bonded connections with failure

  • TIEBREAK contacts and cohesive elements
  • Failure models with and without damage
  • Connection techniques for solids and shells
  • Modeling decomposition
  • Evaluation in the Interface Force file

07 Spot welds and seams, bolts and rivets

  • Mesh-independent weld spot modeling
  • The pros and cons of beam and solid modeling
  • Different ideas for weld seams: what needs to be evaluated?
  • Bolts as beams or solids, with and without prestress

08 Testing and evaluating explicit simulations

  • General model check with the Message files
  • Energy balance check
  • Force and moment balance check
  • Hourglass and mass scaling check
  • Filtering forces and acceleration
  • Recommended Solver settings

Day 3

09 Material characterization and mechanical principles

  • The diversity of material models in LS-DYNA, an overview
  • Hyper- and hypoelasticity
  • Strain and stresses, principle and equivalent values
  • The significance and evaluation of history variables

10 Elasticity and plasticity

  • Isotropic and anisotropic elasticity
  • Plasticity and yield theory – von Mises
  • Isotropic and kinematic hardening
  • Viscoplasticity
  • Handling softening
  • Anisotropic plasticity
  • Two-parameter models: Mohr-Coulomb and Drucker-Prager

11 Material and element failures in connection with damage models

  • The difference between materials failure and element erosion
  • Failure criteria, defined locally or globally
  • Damage models in accordance with Gurson and GISSMO
  • Mesh dependence on failure and its regularization

12 Hyperelasticity, foams, and plastics

  • Rubber modeling with Mooney-Rivlin and Ogden models
  • Considering viscosity and internal friction
  • Elastic foams – comfort foam
  • Plastic foams – energy absorption
  • Plastics: Special characteristics, options, and limits

Your Trainers

Dr.-Ing. Ulrich Stelzmann
Technical Manager Chemnitz, CADFEM Germany GmbH, Chemnitz
Yury Novozhilov
CAE Engineer, CADFEM Germany GmbH, Grafing

Placement in the CADFEM Learning Pathway

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Do you have questions on the training?

When will I receive the final confirmation for my training booking?

Straight after you sign up, an automatic confirmation of receipt will be sent to the email addresses you provided. Once you have successfully verified the data you provided, you will receive your personalized sign-up confirmation, containing further information on course fees, the billing address, etc., by email within two to three working days.  

As soon as the minimum number of attendees has been reached, you will receive a final training confirmation containing further information. If you have booked an on-site training, we recommend that you wait until you have received this final confirmation before booking your travel and accommodation.

If the minimum number of attendees is not reached, we reserve the right to cancel the training seven days before it is due to start at the latest. We are happy to inform you on changing your booking to an alternative date. Please note that we accept no liability for hotel or travel bookings that attendees have already made.

When is the sign-up deadline for a training?

Training places will generally be allocated based on the order in which attendees sign up. For this reason, we always recommend booking for your desired date as early as possible.

As long as a coures still has free places, it can be booked.

At what time do the training courses begin and end?

Usually the training courses start at 9:00 am and end at 5:00 pm of the respective local time. The actual course times will be stated in the booking confirmation. Please note that, depending on the training host, there may be a possible time shift between your and the provider's local time. Therefore all local times are provided with the valid time shift to Greenwich Mean Time (GMT). 

Head of Seminars
Dr. sc. Jörg Helfenstein