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Structural mechanics
Structural mechanics

Explicit Structural Mechanics Using Workbench LS-DYNA

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

Overview

Training eLearning Advanced

In this training, you will learn how to simulate quasi-static processes (forming/joining) and dynamic processes (drop test/crash) with LS-DYNA. This training is offered as a 3-day course or alternatively as a self-paced eLearning course.

Duration
3 days

Prerequisites
Basic knowledge of Ansys Mechanical

Software used
Ansys LS-Dyna

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

Description

For structural mechanics tasks with pronounced non-linearities and/or short-duration dynamic effects, explicit time integration is a suitable computation method. In this 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 provide you with the necessary decision-making criteria for assessing the quality of results.

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.

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.

Test the first module for 30 days free of charge

Get a first impression and test the first eLearning module of this training course without any obligation. No costs, no notice period.

Detailed agenda for this 3-day training

Day 1

01 Theory and Workbench LS-DYNA

  • Method selection for the simulation of large deformations, complex contacts, and nonlinear materials
  • Comparing explicit and implicit solvers
  • Timestep for explicit methods
  • Integration of LS-DYNA in Ansys Workbench
  • Exercise: Taylor Impact

02 Analysis settings and postprocessing

  • Analysis settings: End time, mass scaling, and number of CPUs
  • Extend LS-DYNA result files individually (Output Controls)
  • Result files and their evaluation in the Workbench
  • Demo: Taylor Impact result evaluation

03 Loads, boundary conditions and rigid bodies

  • Definition of loads and boundary conditions for an LS-DYNA model in the Workbench
  • Special features of rigid bodies and point masses
  • Exercise: "Profile bending" forming process with rigid tools

04 LS-PrePost and keyword snippets

  • Post-processing with LS-PrePost: Introduction and Best Practice
  • Demo: Result evaluation with LS-PrePost inside Workbench
  • Building an LS-DYNA input file (*Keyword)
  • Possibilities of keyword snippets
  • Creating keywords in LS-PrePost

Day 2

05 Contacts and body interaction

  • Body Interaction: self-contact for all cases
  • Contacts under frictional influence
  • Bonded contacts and their many possibilities
  • Visualization of typical contact results
  • Defining various contact options
  • Exercise: Impact of a pipe

06 Contact settings

  • Options for matching contact stiffnesses (Penalty & Soft Constrain Formulation)
  • Tips for using contact options
  • How do keyword snippets work for the contact?
  • Exercise: Crimping process with complex contact situation

07 Quasi-static analysis and result verification

  • What is the difference between quasi-static and dynamic analyses?
  • Checking the energy balance and evaluating the simulation
  • What other results need to be checked?
  • Exercise: Quasi-static calculation of a three-point bending test

08 Engineering data and material models

  • Which LS-DYNA materials are available in the Workbench (Engineering Data)?
  • Special LS-DYNA material models and their definition within the Workbench
  • Importing material cards using keyword snippets
  • Exercise: Deep drawing process with plastic anisotropy

Day 3

09 Meshing and element formulations

  • What is Hourglassing and how can the Hourglass control be applied?
  • Element formulations for solid elements, shells, and beams in LS-DYNA Solver
  • Why does an explicit calculation need a corresponding mesh? (Implementation in Mechanical)
  • Tips on mesh generation for an explicit analysis
  • Demo: Plate bending with various element types

10 Connections

  • Connections using discrete elements and beams
  • Joints and their definition
  • Creating connections to rigid bodies (Rigid Body Extra Nodes)
  • Demo: Mechanisms with joints and beam connections (bolts)

11 Workshop 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 penetrations and interference contacts
  • Demo: Dynamic relaxation
  • Demo: Interference contacts

Your Trainers

Ralph Rauchheld
CAE Engineer, CADFEM Germany GmbH, Chemnitz
Dr.-Ing. Ulrich Stelzmann
Technical Manager Chemnitz, CADFEM Germany GmbH, Chemnitz
Dr. sc. ETH Manfred Maurer
Engineering Services, CADFEM (Suisse) AG, Aadorf
Bernard Feuillard
Engineering Services, CADFEM (Suisse) AG, Renens
Dr. Ing. Benoit Fontenier
CAE Engineer - Support, CADFEM France SAS
Ian Turner
Consultancy Manager, CADFEM UK Ltd

Placement in the CADFEM Learning Pathway

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1 to 6 out of 6 matching results

Test the first module for 30 days free of charge

Get a first impression and test the first eLearning module of this training course without any obligation. No costs, no notice period.

Not the right offer or date?

Whether eLearning, classroom courses, live online training or customized workshops - together we identify the best option for you.

What CADFEM customers are saying

Arnold Herrgen
Development Engineer, Drägerwerk AG & Co. KGaA

The course 'Explicit Structural Mechanics Using Workbench LS-DYNA' from CADFEM was recommended to me by a colleague and I wholeheartedly endorse this recommendation. The content was presented very clearly, and the diverse workshop tasks were very well aligned with the course content.

Fabian Kristmann
R&D Innovation & Applied Science, ERNI DEUTSCHLAND GmbH

The CADFEM course Introduction to explicit structural mechanics with Workbench LS-Dyna is the best training for learning simulation with Ansys LS-Dyna! I wholeheartedly recommend the new online training format.

Do you have questions on the training or the eLearning?

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). 

Can I test the eLearning offer without obligation?

To get a clear impression of our online learning format, we offer you a trial allowing you access to the starting module of an eLearning course of your choice. No costs, no cancellation period or anything similar. Moreover, with this free test access you can check all the technical requirements for a smooth learning process. You can easily request the free module from any eLearning course.

How much time should I allow for an eLearning course?

Each online course day comprises four eLearning modules. You should ideally allow 90 to 120 minutes of uninterrupted learning time for each module. This will allow you to acquire the knowledge provided by a module and to consolidate it through quiz questions and Ansys exercises. By dividing each module into micro learning units, you can also make good use of smaller time windows, such as on your commute.

For how long can I access the learning content?

Prerequisite for the use of the eLearning courses is the use of a personalized access to the CADFEM learning platform. When purchasing an eLearning course, access to the learning platform is 365 days. As a subscription user, access to the learning platform starts and ends with the start and end of the flat rate. With the start of a further learning product (Learning Subscription, training, eLearning), access to your content is extended by 365 days.

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