Accompanying Seminars

Overview

Seminar title Date
Smoothed Particle Hydrodynamics (SPH) in LS-DYNA11 - 12 June
Crashworthiness Simulation with LS-DYNA 9 - 12 June
Concrete and Geomaterial Modeling 11 - 12 June
NVH & Frequency Domain Analysis with LS-DYNA 11 - 12 June
ALE and Fluid-Structure Interaction 11 - 12 June
LS-OPT – Introduction and Optimization 18 - 19 June
Implicite Analysis using LS-DYNA 18 - 19 June
Damage and Failure Modeling 18 - 19 June
Introduction to Composite Modeling with LS-DYNA 18 - 19 June
Meshfree EFG, SPG, Advanced FE Methods 18 - 19 June
Methods for Simulating Short Duration Events 18 - 19 June
Blast Modeling with LS-DYNA 22 - 23 June
Penetration Modeling with LS-DYNA 24 - 25 June
Explosives Modeling for Engineers 26 June
Electromagnetism in LS-DYNA 22 June
ICFD Incompressible Fluid Solver in LS-DYNA 23 - 24 June
CESE Compressible Fluid Solver in LS-DYNA 25 June

 

Smoothed Particle Hydrodynamics (SPH) in LS-DYNA

11 - 12 June

 

Attendees of this seminar will be introduced to the theoretical basics of the meshless method “Smoothed Particle Hydrodynamics” (SPH) and receive guidance for its practical application in LS-DYNA. The seminar will thoroughly illustrate the necessary configurations in the LS-DYNA input deck to realize a successful nonlinear SPH simulation and will furthermore clarify the differences to conventional FEM. Due to the true meshless nature of SPH, the method is perfectly suitable in situations with very large deformations. Typical applications of SPH in LS-DYNA include impact simulations of fluids or solids or other scenarios where it is essential to capture the momentum exchange accurately. Attendees will learn the application of the SPH with the aid of many workshop examples. The course instructor Prof. Mhamed Soul of the University of Lille is a long-term software developer at LSTC and is frequently implementing new features for the methods ALE and SPH in LS-DYNA. This seminar aims at engineers who have already worked with LS-DYNA and would like to use SPH as a meshless method.

 

Lecturer: Jingxiao Xu (LSTC)

Language: English

Registration

 

Crashworthiness Simulation with LS-DYNA

9 - 12 June

 

This is an advanced course and applies to engineers who have experience in the application of explicit programs or basic knowledge in the field of dynamic and nonlinear calculation with implicit programs. The aim of the course is to show how to perform a crashworthiness simulation in the automobile industry using LS-DYNA, whereby the presented methods are transferable to other kinds of crashworthiness simulations (rail vehicles, components of vehicles, airplanes, vans, etc.).  Each crashworthiness simulation is a compromise between profitability and accuracy. At the moment there is no kind of a guideline for modeling and calculating crash. Therefore, the user has to be aware of advantages and disadvantages of different kinds of modeling procedures depending on the purpose of the simulation. In particular, the aim of the course is to show how to perform an accurate and reliable crashworthiness simulation by thorough modeling and further understanding of the procedure. This course is designated for new employees from automotive development departments of car manufacturers and suppliers of the automobile industry as well as engineering companies and other users in related industrial sectors. The course instructor is an expert in crashworthiness simulation and is working for several car manufacturers using different FE-codes worldwide. He is also an excellent and popular teacher.

 

Lecturer: Paul Du Bois (Consultant)

Language: English

Registration

 

Concrete and Geomaterial Modeling

11 - 12 June

 

The course starts from the common ground of introductory metal plasticity constitutive modeling and successively builds on this base adding the constitutive modeling features necessary to model concrete and geomaterials. The LS-DYNA constitutive models covered are adequate for modeling most types of rock, all concretes, and a large class of soils. The course is intended for those new to concrete & geomaterial constitutive modeling, but will also be useful to those seeking a more in-depth explanation of the LS-DYNA concrete and geomaterial constitutive models covered. A significant portion of the course is devoted to understanding the types of laboratory tests and data that are available to characterize concrete and geomaterials. Unlike most metals, whose strength is characterized by a single value obtained from a simple uniaxial stress test, concrete and geomaterial characterization requires a matrix of laboratory tests. A knowledge of how these tests are performed, the form and format, of typical laboratory test data, and the interpretation of the data for use with a concrete or geomaterial constitutive model, is essential to becoming a successful concrete & geomaterial modeler. The lecturer, Dr. Len Schwer, works since 25 years on the development of material models for geomaterial applications. The so called "Smooth Cap Model" for geomaterials was implemented by himself in DYNA3D and is builded in in the modified version in LS-DYNA. Since 1997 he works with the professors Belytschko and Liu from the Northwestern University on the application of meshless methods for the modeling of concrete.

 

Lecturer: Dr. Len Schwer (Schwer Engineering & Consulting)

Language: English

Registration


NVH & Frequency Domain Analysis with LS-DYNA

11 - 12 June

 

The objective of the training course is to introduce the frequency domain vibration and acoustic features of LS-DYNA to users, and give a detailed look at the application of these features in vehicleNVH simulation. This course is recommended for engineers who want to run NVH or other frequency domain vibration and acoustic simulation problems with LS-DYNA. This course is useful for engineers and researchers who are working in the area of vehicle NVH, aircraft/spacecraft vibro-acoustics, engine noise simulation, machine vibration testing and simulation, etc.

 

Lecturer: Dr. Yun Huang (LSTC)

Language: English

Registration

 

ALE and Fluid-Structure Interaction

11 - 12 June

 

In this seminar, you receive comprehensive information directly from one of the program developers about the latest developments of the features provided by the solver LS-DYNA to analyse fluids and, in particular, the fluid-structure interaction using its Arbitrary Lagrangean Eulerian (ALE) capabilities. The theoretical background to fluid modeling in LS-DYNA is presented and illustrated with several practical applications. Problems solved during the workshop include tank sloshing, tank dropping (partially and completely filled), viscous flow in a channel, underwater explosion, bird strike, ship collision and acoustics in air and water.  The seminar is directed towards advanced LS-DYNA users, whereas prior knowledge of fluid dynamics is not required.

 

Lecturer: Prof. Mhamed Souli (University Lille)

Language: English

Registration

 

LS-OPT – Introduction and Optimization

18 - 19 June


LS-OPT is an independent, comprehensive optimization program from LSTC. It is ideal for solving strongly non-linear optimization problems and is thus highly suitable for use in combination with LS-DYNA. However, LS-OPT can also be combined with any other solver. LS-OPT functions on the basis of a special, highly effective response surface method. The program also includes stochastic methods for assessing the robustness of FE models and illustrating dependencies between optimization variables and desired values. Input from the user is supported by a comfortable graphical user interface.  The seminar gives an introduction to the program LS-OPT. General theory aspects of the Response Surface Method are discussed and the possibilities of applying this method in LS-OPT are especially explained. In particular, the application of LS-OPT in combination with non-linear FE solvers will be discussed in more detail. Seminar participants will be given the chance to implement their newly-gained knowledge by working on practice examples.

 

Lecturer: Katharina Witowski (DYNAmore)

Language: English

Registration

 

Implicite Analysis using LS-DYNA

18 - 19 June


In recent years, the simulation possibilities in LS-DYNA using implicit time integration have been enhanced extensively. The main areas of application for implicit analyses include linear and non-linear static computations, natural frequency analyses, springback, lengthy transient simulations, systems with preload, etc.  The aim of the seminar is to give participants an overview of the possibilities and limits of implicit simulations using LS-DYNA. In particular, attention will be drawn on the required input cards for such simulations.  The seminar is recommended for engineers intending to use LS-DYNA to carry out implicit simulations. In addition, experienced “explicit users” have the opportunity to learn about what to bear in mind when converting explicit input decks to implicit input decks. Examples will be given during the seminar to illustrate the functionality of the implicit options.

 

Lecturers: Dr.-Ing. Tobias Erhart, Dr.-Ing. Nils Karajan (DYNAmore)

Language: English

Registration

 

Damage and Failure Modeling

18 - 19 June

 

This two-day seminar will discuss issues related to the adjustment of material models considering the failure, which can sometimes be relatively complex. The seminar intends to look at the complete picture, reaching from the approach to test design to the actual creation of a material card using LS-DYNA, thus reflecting the entire verification and validation process.  In more detail, the conversion of test data to real stress and expansion values will be explained, as well as the dependencies of deformation patterns on anisotropy and tri-axial condition, including complex descriptions of failure. In addition, the seminar intends to explain, in particular, the influence of model reduction in shell elements, using descriptions of failure. e.g. according to Wierzbicki, on the basis of Gurson, Johnson-Cook and extended Barlat models. The influence of the dependency on element size will be discussed in the context of expansion and energy equivalence. The issues of material stability and strength loss will be discussed in detail using the Gurson material model. Exercise examples illustrate the theoretical findings.

 

Lecturers: Dr.-Ing. Markus Feucht (Daimler); Dr.-Ing. André Haufe (DYNAmore)

Language: English

Registration

 

Introduction to Composite Modeling with LS-DYNA

18 - 19 June

 

Increasing requirements on resistance and durability in conjunction with weight reduction have advanced the development of composite materials very strongly within the last decades. Composites are no longer used for special applications or subordinate components, but increasingly for components in volume production. Hence concepts are on demand to capture the complex mechanisms of load transfer and failure within numerical simulations. Very important subgroups of “Composites” are long fiber reinforced composite materials. They typically consist of high-strength carbon or glass fibers which are unidirectionally embedded in thin layers of an epoxy resin matrix. This seminar gives an overview on potential modeling technics of this subgroup. The strong anisotropy of these composite structures leads to complex mechanical behavior which has to be captured in the simulation. Therefore, the available material models in LS-DYNA are introduced and discussed in-depth. Some of these models are implemented and co-developed with the support from DYNAmore employees. Furthermore, different possibilities to model the phenomena of delamination are shown. The applicability and limits are demonstrated by means of small numerical examples.

 

Lecturers: Christian Liebold, Dr.-Ing. Thomas Klöppel, Dr.-Ing. Stefan Hartmann (DYNAmore)

Language: English

Registration

 

Meshfree EFG, SPG, Advanced FE Methods

18 - 19 June

 

Attendees of this seminar will be introduced to the fundamental background of various Meshfree and advanced FEM methods. Particular attention is drawn on the application of the meshless method “Element-Free Galerkin” (EFG) as well as the newly developed method “Smoothed Particle Galerkin” (SPG). The seminar will thoroughly refer to the settings required in the LS-DYNA input deck to carry out a successful nonlinear meshfree or advanced FEM simulation. Herein, the difference between the conventional EFG and SPG formulations and the adaptive or discontinuous formulations will be explained. Common applications of these methods are materials made of rubber or foam that undergo large deformations. The adaptive EFG formulation is the method of choice for the efficient simulation of cutting, bulk forming and forging processes. In particular, the new features of local mesh refinement in combination with the implicit time integration are the key enablers for these processes. Moreover, fracture simulations can be carried using the discontinuous EFG formulation.

 

Lecturers: Dr. Cheng-Tang Wu, Dr. Wei Hu (LSTC)

Language: English

Registration

 

 

Methods for Simulating Short Duration Events

18 - 19 June

 

Most applications of LS-DYNA are for complex, and often combined, physics where nonlinearities due to large deformations and material response, including failure, are the norm. Often the goal of such simulations is to provide predictions which will ultimately be used to guide product development and safety assessments. Insights into modeling and simulation are illustrated through examples and numerous modeling ‘tricks’ and options are discussed. An emphasis is placed on modeling techniques, guidelines for which technique(s) to select, which techniques work well and when, and possible pitfalls in modeling choice selections. Simulation credibility is demonstrated through solution of multiple models, with associated multiple solvers, required checks of global and local energies, and mesh refinement strategies. This two day class provides instruction on the selection and use of the LS-DYNA solvers used for analyzing blast and penetration related problems. It is intended for the LS-DYNA analysts possessing a comfortable command of the LS-DYNA keywords and options associated with typical Lagrange analyses. The training class will attempt to provide the analyst with the additional tools and knowledge required to make appropriate modeling decisions and convey the level of confidence in predictive results.

 

Lecturers: Paul Du Bois (Consultant); Dr. Len Schwer (Schwer Engineering & Consulting)

Language: English

Registration

 

 

Blast Modeling with LS-DYNA

22 - 23 June

 

Blast events form a class of simulation environments well suited to the solution capabilities of LS-DYNA. LS-DYNA is unique in offering the analyst the choice of Lagrange, Eulerian (ALE) and Simple Engineering solvers, and combinations of these solvers, for simulating high energy events such as blast loading. In addition to air blast, the traditional focus of blast modeling, buried explosive charges have recently become important in the design of troop transportation. This class focuses on the application of LS-DYNA for the simulation of high energy events. The analysis methods, and modeling, are illustrated through case studies. An emphasis is placed on modeling techniques: guidelines for which technique(s) to select, insights into which techniques work well and when, and possible pitfalls in modeling choice selections. Sufficient mathematical theory is presented for each technique to provide the typical user with adequate knowledge to confidently apply the appropriate analysis technique. However, this training class is not a substitute for the in-depth treatments presented in the associated LS-DYNA training class, i.e. „ALE/Eulerian & Fluid Structure Interaction.”

 

Lecturers: Paul Du Bois (Consultant); Dr. Len Schwer (Schwer Engineering & Consulting)

Language: English

Registration

 

 

Penetration Modeling with LS-DYNA

24 - 25 June

 

Penetration events form a class of simulation environments well suited to the solution capabilities of LS-DYNA. LS-DYNA is unique in offering the analyst the choice of Lagrange, Eulerian (ALE) and Meshfree Methods, and combinations of these methods, for simulating high energy events such as penetration and perforation. In addition to high energy, these events are typically associated with large deformations, damage, and failure both on the material and structural level. During the past decade successful modeling of such damage and failure has moved steadily from a „Black Art” to a widely accepted engineering practice. This class focuses on the application of LS-DYNA for the simulation of high energy events. The analysis methods, and modeling, are illustrated through case studies. An emphasis is placed on modeling techniques: guidelines for which technique(s) to select, insights into which techniques work well and when, and possible pitfalls in modeling choice selections. Sufficient mathematical theory is presented for each technique, especially Meshfree Methods, to provide the typical user with adequate knowledge to confidently apply the appropriate analysis technique. However, this training class is not a substitute for the in-depth treatments presented in the associated LS-DYNA training classes, i.e. „ALE/Eulerian & Fluid Structure Interaction” and „Mesh-Free Methods (SPH-EFG)”, respectively.

 

Lecturers: Paul Du Bois (Consultant); Dr. Len Schwer (Schwer Engineering & Consulting)

Language: English

Registration

 

 

Explosives Modeling for Engineers

26 June

 

This class focuses on the application of LS-DYNA to modeling explosives. LS-DYNA simulations involving explosives can be modeled on several engineering levels from simple application of equivalent pressure histories via *LOAD_BLAST_EN-HANCED, explicit inclusion of explosive charges using Equations-of-State and detonation via *IN-ITIAL_DETONATION, and detonation of explosive due to impact using *EOS_IGNITION_AND_GROW-TH_OF_REACTION_IN_HE. The analyst selects the appropriate degree of model sophistication to satisfy the intended use of the model results.  The modeling methods are illustrated through case studies with sufficient mathematical theory to provide the user with adequate knowledge to then confidently apply the appropriate modeling method. This training class is intended for the LS-DYNA analyst possessing a comfortable command of the LS-DYNA keywords and options associated with typical Lagrange and Multi-Material Arbitrary Lagrange Eulerian (MM-ALE) analyses. The training class will attempt to provide the analyst with the additional tools and knowledge required to model explosives for a range of applications. The theory and illustrations portions of the class will benefit LS-DYNA users and non-LS-DYNA users alike.

 

Lecturers: Paul Du Bois (Consultant); Dr. Len Schwer (Schwer Engineering & Consulting)

Language: English

Registration

 

Electromagnetism in LS-DYNA

22 June

 

This course provides an introduction to the Electromagnetics (EM) solver in LS-DYNA. The Maxwell equations are solved in the Eddy-Current approximation suitable for cases, where the propagation of electromagnetic waves in air (or vacuum) can be considered as instantaneous. The solver is coupled with the solid mechanics and thermal solvers of LS-DYNA allowing the simulation and solution of applications such as magnetic metal forming, welding, bending, induced heating, resistive heating and so forth. The course includes a presentation of the solver’s general principles and applications, a complete keyword description for setting up an Eddy-Current problem, an introduction to the more advanced features (Inductive heating problems, exterior magnetic field, magnetic materials and so forth) as well as an advanced description of the available controlling tools to ensure a safe analysis. Key electromagnetic concepts are reviewed throughout the course and a general knowledge about electromagnetics is therefore appreciated but not mandatory.

 

Lecturer: Dr. Iñaki Çaldichoury (LSTC)

Language: English

Registratration


ICFD Incompressible Fluid Solver in LS-DYNA

23 - 24 June

 

This course provides an introduction to the incompressible fluid solver (ICFD) in LS-DYNA. It focuses on the solution of CFD problems, where the incompressibility constraint may be applied, e. g. ground vehicle, aerodynamics, hemodynamics, free-surface problems, ship hydrodynamics, etc. The solver may run as a stand-alone CFD solver, where only fluid dynamics effects are studied, or it can be coupled to the solid mechanics solver to study loosely or strongly coupled fluid-structure interaction (FSI) problems. The first day of the course includes a presentation of the general principles and applications of the solver, a step by step guide to setting up a simple CFD problem, advanced feature introduction (FSI, conjugate heat transfer) and so forth. A brief review of basic fluid mechanics and CFD concepts are also offered such that no expert knowledge of fluids is required. The second day will deal with the newly implemented features and advanced applications.

 

Lecturer: Dr. Iñaki Çaldichoury (LSTC)

Language: English

Registration

 

CESE Compressible Fluid Solver in LS-DYNA

25 June


Compressibility effects in fluid mechanics are typically considered significant if the Mach number of the flow exceeds 0.3 or if the fluid undergoes very large pressure changes. The most distinct phenomenon associated with high speed flows is the existence of shock waves or non-isentropic solutions. The new compressible flow solver CESE in LS-DYNA is based on a novel numerical framework originally proposed by Dr. Chang of the NASA Glenn Research Center. The method exhibits many non-traditional features, including a unified treatment of space and time, the introduction of a conservation element (CE) and a solution element (SE), and a novel shock capturing strategy without using a Riemann solver, which is able to simultaneously capture both strong shocks and small disturbances. Moreover, the spatial gradients are treated as unknowns which allows for more accurate solutions of the shock waves than normal second order schemes. So far, this method has been used to solve many different types of flow problems, such as detonation waves, shock/acoustic wave interaction, cavitating flows, and chemical reaction flows. In LS-DYNA, it has been extended to also solve fluid-structure interaction (FSI) problems with the embedded (immersed) boundary approach or moving (fitted) mesh approach.

 

Lecturer: Dr. Iñaki Çaldichoury (LSTC)

Language: English

Registration