André Haufe

André Haufe
DYNAmore GmbH Stuttgart · R&D

Prof. Dr.-Ing.

About

253
Publications
72,473
Reads
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652
Citations
Introduction
André Haufe is responsible for method development in the field of Process Simulation at DYNAmore GmbH, Stuttgart, Germany. This includes research in material modelling (steel, alloys, all types of polymers), structural mechanics (finite element shell models as well as solid discretization) and respective industrial application of LS-DYNA.

Publications

Publications (253)
Article
The computational analysis of adhesives within finite element simulations is important for many engineering applications, from automotive structures to civil engineering. The underlying material descriptions are closed, analytically formulated models representing the stress-response of the material for given strains. In this publication, we investi...
Article
Full-text available
In modern manufacturing processes such as hot forming or additive manufacturing, the workpiece material undergoes very complex thermomechanical load cycles. The local mechanical properties in the component are process-dependent and the result of the different micro-structure evolution mechanisms in the material. Numerical process simulation tools a...
Article
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Failure and deformation behavior of veneer laminates of ring porous wood species vary with the individual arrangement of early- and latewood zones over a veneer sheet. Therefore, a method is presented, where local failure and damage modes are considered for finite element models with respect to forming simulations, during the development process of...
Conference Paper
https://www.dynalook.com/conferences/16th-international-ls-dyna-conference/aerospace-t9-1/t9-1-a-aerospace-186.pdf/view
Article
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Over the last years, the forecast quality in production and especially (cold) forming simulations has reached a high level at least for standard materials. It has become state-of-the-art to take the results of these process simulations into account e.g. for crashworthiness analyses. For most of the currently used high-performance materials, however...
Chapter
Im Folgenden soll der im Rahmen vom Digitalen Prototyp entwickelte Datenaustauschcontainer vorgestellt und erläutert werden. Die Entwicklung wird im Rahmen des Anschlussprojektes Digitaler Fingerabdruck fortgeführt, so dass die hier vorgestellte Lösung noch nicht als vollständig betrachtet werden kann vgl. Kommentar Christian.
Chapter
Das Übertragen oder auch Mappen von Simulationsergebnissen von einem Prozessschritt auf den Nachfolgenden stellt einen zentralen Bestandteil des Digitalen Prototyps dar. Hierfür wurde das Tool envyo® verwendet und weiterentwickelt. Im Folgenden werden die entwickelten Übertragungsmethoden zwischen den verschiedenen Prozessschritten vorgestellt und...
Article
Full-text available
The main goal of constitutive model calibration in the field of sheet metal forming is to describe the stress and strain relationship for numerical simulation of the production process as accurate as possible. This may be achieved through enlarged reverse-engineering strategies which are based on available classical or even modified experimental in...
Book
Der Forschungscampus ARENA2036 ist ein neuer, langfristiger Projektansatz, der vom deutschen Bundesministerium für Bildung und Forschung (BMBF; Forschungscampus ARENA2036) finanziert wird. Er ist einer der neun großen wissenschaftlichen Campi in Deutschland und ist der einzige, der direkt in die Hauptphase (Phase 1) gestartet ist. Die ARENA2036 bef...
Conference Paper
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In this contribution, it is investigated if machine learning is suitable to support the process of material characterization. Through deep neural networks it is possible to "learn" nonlinear relationships between a set of input values and the corresponding output, also known as labels. As a proof of concept, it is examined whether the shape of the...
Article
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In recent years, one has seen a tremendous progress in methods for the simulation of production processes, especially in the automotive industry. Besides sheet metal forming, casting of alloys, moulding of polymers and various additive techniques are the key methods in manufacturing. In this list, sheet metal forming is unarguably the most mature v...
Conference Paper
Mitte 2018 und nach fünf Jahren Forschungszeit kommt eines der drei technischen Startprojekte der ARENA2036 zum Ende. Zu diesem Anlass und als Projektabschluss sollen Forschungsergebnisse aus dem Projekt DigitPro vorgestellt werden. Der Digitale Prototyp stellt das Bindeglied zwischen klassischen Ingenieurstätigkeiten und der Industrie 4.0 dar. Bau...
Conference Paper
Typically, the material characterization for the simulation is performed based on the virgin material which is used for the preparation of the corresponding component. However, due to the processing of the material, its mechanical properties may vary greatly. A typical example are materials subjected to forming operations. The work hardening during...
Conference Paper
Full-text available
In recent years results of digital image correlation (DIC) techniques have significantly improved in terms of accuracy, resolution as well as the speed of experimental strain measurement. The current availability of 2D or even 3D surface strain history during loading allows new approaches in constitutive parameter identification. In addition, local...
Technical Report
The aim of TWIP4EU is to promote the introduction of modern twinning induced plasticity (TWIP) steels as candidate material for production of lightweight automobile components. To introduce a new steel grade like high strength and ductility TWIP-steel for large scale applications in industrial practice, a thorough validation of the material behavio...
Conference Paper
Full-text available
Typically, the material characterization for the simulation is performed based on the virgin material, which is used for the preparation of the corresponding component. However, due to the processing of the material, its properties may vary greatly. Obviously, a material card adapted to the untreated material would not provide an acceptable match w...
Presentation
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Novel Approach to Model Laminated Glass
Presentation
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Predictive Fracture Modeling in Crashworthiness: A Discussion of the Limits of Shell-Discretized Structures
Presentation
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The Simulation Process Chain: From Manufacturing to Part Performance of Composites
Article
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The goal of this contribution is to formally present an incremental damage model conceived to predict failure of ductile materials in forming and crash applications. Denoted henceforth by the acronym Generalized Incremental Stress State Dependent Damage Model (GISSMO), the present model’s framework is based on an incremental damage accumulation whi...
Presentation
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A new versatile tool for simulation of failure in LS-DYNA and the application to aluminium extrusions
Presentation
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Process simulation of induction heated carbon fiber- reinforced thermoplastics using LS-DYNA ®
Presentation
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Process simulation of induction heated carbon fiber- reinforced thermoplastics using LS-DYNA ®
Conference Paper
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As there is a trend in the automotive industry towards using FRP composites for reducing the weight of vehicles, adequate simulation tools to effectively and accurately predict the structural response of composite structures in crashworthiness are needed. Due to the manufacturing induced fiber orientation, which is particularly for short fiber rein...
Presentation
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Predictive fracture modelling in crashworthiness: A discussion of the limits of shell discretized structures
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Predictive fracture modelling in crashworthiness: A discussion of the limits of shell discretized structures
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Predictive fracture modelling in crashworthiness: A discussion of the limits of shell discretized structures
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Integrative Simulation for short and continuous fiber reinforced composites
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Zur Modellierung der Dehnratenabhängigkeit bei Blechwerkstoffen
Presentation
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Zur Modellierung der Dehnratenabhängigkeit bei Blechwerkstoffen
Book
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The aim of the project was to significantly improve the formability assessment of Advanced High Strength Steel (AHSS) and to improve the reliability of using AHSS in industrial stamping applications. Consequently, a more efficient and thus also economical use of AHSS becomes feasible. The focus of the project is on complex stamping parts, in which...
Presentation
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Eine Übersicht über aktuelle Modellierungsmöglichkeiten von Stanzprozessen.
Presentation
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Car body parts based on sandwich panels: presumptions for model building and simulation of the forming process
Article
High manganese content TWinning Induced Plasticity (TWIP) steels are promising for the production of lightweight components due to their high strength combined with extreme ductility, see [1]. This paper deals with the implementation of a constitutive model for the macroscopic deformation behavior of TWIP steels under mechanical loading with the ai...
Article
Forming, press hardening and welding are a well-established production processes in manufacturing industry, but predicting the finished geometry and the final material properties of the processed parts is still a major issue. In particular, deformations caused by welding are often neglected in the virtual process chain, although they have to be com...
Conference Paper
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The paper describes parts of the joint research project Swim-RTM including several industrial and academic partners. Its goal is to combine LS-DYNA and the open-source CFD solver OpenFOAM to simulate the production process of continuous fiber-reinforced plastics, particularly the resin-transfer-molding (RTM) process, in which the layers of dry fabr...
Presentation
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Prediction of Dynamic Material Failure – Part II: Application with GISSMO in LS-DYNA
Presentation
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Prediction of Dynamic Material Failure – Part I: Strain rate dependent plastic yielding
Article
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Reliable prediction of damage and failure in structural parts is a major challenge posed in engineering mechanics. Although solid material models predicting the deformation behaviour of a structure are increasingly available, reliable prediction of failure remains still open. With SAMP (a Semi-Analytical Model for Polymers), a general and flexible...
Presentation
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Versagensprognose in der Crashberechnung: Aktuelle Aspekte der Modellierung
Presentation
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Neue Entwicklungen und Trends bei der Crash-Simulation von FVK-Komponenten in der industriellen Anwendungen
Article
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Due to their high strength (tensile strength < 1GPa) in combination with an extreme ductility (failure strain 30-50%) TWinning Induced Plasticity-steels (TWIP-steels) can be considered as promising materials for the production of lightweight automotive components. The industrial application of TWIP-steels requires a fundamental experimental validat...
Presentation
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Recent developments and trends for composite modeling in LS-DYNA
Article
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During the last decade the simulation of the airbag deployment process has become a standard application of explicit finite element codes. At the beginning of the development the focus was to capture the influence and improve the results of dummy impact on fully inflated airbags. Later the deployment kinematics of folded airbags, different folding...
Data
Full-text available
Workshop “Simulation in der Umformtechnik“, Institut für Statik und Dynamik, Universität Stuttgart
Article
In recent years, the requirements on passive safety of cars have grown to high standards, leading to a permanent demand on an increase in simulation accuracy. Additionally, demands on fuel efficiency and CO2 – reduction are confronting car body designers with the need of substantial weight reduction. Hence, the increasing use of high and ultra-high...
Article
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The increasing demands with regard to the predictive capabilities and the exactness of crash simulations require more and more investigations into numerical models in order to capture the physical behavior reliably. Steps towards this goal are the usage of finer meshes which allow for a better geometrical representation and more sophisticated mater...