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Introduction to explicit structural mechanics with Workbench LS-DYNA

Statics is a thing of the past - highly nonlinear dynamic simulations for real deformations

CADFEM
Training
Structural mechanics
Structural mechanics

Learn how to simulate quasi-static processes (forming/joining) and dynamic processes (drop test/crash) with explicit LS-Dyna solvers.

For structural mechanics tasks with pronounced non-linearities and/or short-duration dynamic effects, explicit time integration is a suitable computation method. In this introductory training, you will begin by learning the requisite knowledge of the theory and application of ...

more details of product

Overview
Level:
Advanced
Target group:
Users, Students, Instructors
Prerequisites:
Basic knowledge of Ansys Mechanical
Benefits:
  • Using LS-DYNA in the conventional Mechanical environment
  • Being able to take advantage of the benefits of explicit time integration
  • Being able to reliably complete highly non-linear tasks
  • Understanding the criteria for assessing the quality of results
Applications:
Dynamics, Contact, Linear/Non-linear Simulation, Material models
Software used:
Ansys LS-Dyna
Level
Advanced
Target group
Users, Students, Instructors
Prerequisites
Basic knowledge of Ansys Mechanical
Benefits
  • Using LS-DYNA in the conventional Mechanical environment
  • Being able to take advantage of the benefits of explicit time integration
  • Being able to reliably complete highly non-linear tasks
  • Understanding the criteria for assessing the quality of results
Applications
Dynamics, Contact, Linear/Non-linear Simulation, Material models
Software used
Ansys LS-Dyna
agenda day 1
  • Theory and Workbench LS-DYNA
  • Analysis settings and postprocessing
  • Loads, boundary conditions and rigid bodies
  • LS-PREPOST and keyword snippets
agenda day 2
  • Contacts and body interaction
  • Contact settings
  • Quasi-static analysis and result verification
  • Engineering data and material models
agenda day 3
  • Meshing and element formulations
  • Connections
  • Practical example: “cell phone” drop test
  • Overview of advanced topics

Available dates

Not the right offer? No suitable date? Whether eLearning, classroom courses, live online training or customized workshops - together we identify the best option for you.

Our offer in detail

This training is offered as a 3-day, consisting of 12 modules.

Day 1

01 Theory and Workbench LS-DYNA

  • Explicit time integration procedure and typical application areas
  • The explicit time step
  • LS-DYNA Workbench: Integration of LS-DYNA into Ansys Workbench

02 Analysis settings and postprocessing

  • Initial example: Taylor impact
  • LS-DYNA results files
  • Results evaluation in LS-DYNA Workbench
  • Analysis settings

03 Loads, boundary conditions and rigid bodies

  • Loads and boundary conditions
  • Rigid bodies and point loads
  • Example: “Profile bending” forming process with rigid tools

04 LS-PREPOST and keyword snippets

  • Post-processing with LS-PREPOST
  • Keywords
  • Keyword snippets
  • Creating keywords in LS-PREPOST

Day 2

05 Contacts and body interaction

  • Bonded contacts
  • Friction contacts
  • Body interaction (self contact)
  • Example: Impact with self contact

06 Contact settings

  • Contact stiffness
  • Contact search
  • Other contact settings
  • Keyword snippets for contact
  • Example: Crimp process with complex contact situation

07 Quasi-static analysis and result verification

  • Quasi-static vs. dynamic analyses
  • Energy balance
  • Results check
  • Example: Quasi-static load capacity computation of a three-point bending test

08 Engineering data and material models

  • Engineering data
  • LS-DYNA material models
  • Keyword snippets for material
  • Example: Drawing process with plastic anisotropy

Day 3

09 Meshing and element formulations

  • Hourglassing and hourglass check
  • Element formulations for volume elements, shells, and beams
  • Meshing in Mechanical for explicit computations

10 Connections

  • Discrete element and beam connections
  • Joints
  • Rigid Body Extra Nodes
  • Example for modeling of screw connections in plastic housing

11 Practical example: “cell phone” drop test

  • Model creation with non-linear contacts, meshing, and materials definition
  • Computation execution
  • Results evaluation and model check
  • Discussion of results
  • Problem handling for contacts and element formulation

12 Overview of advanced topics

  • Restart
  • Bolt preload and dynamic relaxation
  • Multistage computation: Birth and death for boundary conditions and contacts
  • Initial stresses
  • Initial penetration and interference contacts

For structural mechanics tasks with pronounced non-linearities and/or short-duration dynamic effects, explicit time integration is a suitable computation method. In this introductory training, you will begin by learning the requisite knowledge of the theory and application of explicit FEM. The focus topics of the course are modeling in Ansys Workbench and considering non-linear materials and contacts. Using realistic examples, you will learn to simulate quasi-static processes such as forming and joining, or dynamic processes such as drop and impact tests. For displaying results, we will introduce LS-PREPOST in addition to Ansys Mechanical for advanced evaluations. We will also give you the necessary decision criteria for assessing the quality of results.

This training is aimed at users whose responsibilities involve short duration dynamics, such as drop tests and crashes. In addition, it will be of interest to all simulation engineers seeking a solution to highly non-linear tasks in structural mechanics.

You will learn how to use LS-DYNA in the Workbench environment. You will know how to take advantage of the benefits of explicit time integration and be able to use LS-DYNA for your own applications.

Ralph Rauchheld
CAE Engineer, CADFEM GmbH, Chemnitz
Thomas Sparrer
CAE Engineer, CADFEM (Austria) GmbH, Wien
Bernard Feuillard
Engineering Services, CADFEM (Suisse) AG, Renens
Andre Stühmeyer
CAE Engineer, CADFEM GmbH, Hanover

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 seminar fees, the billing address, hotel recommendations, 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 on how to get to the venue. 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 help you change 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 seminar still has free places, it can be booked.

When 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). 

The following time difference to GMT during summer/winter time applies to the individual training providers:

Head of Seminars
Dr. sc. Jörg Helfenstein

Additional Offers

The right training, hardware and additional software products are the keys to success when it comes to a quick introduction to simulation.