Materials Behavior and Materials Modelling

Department

Investigation of the material behavior at high temperatures as well as processestaking place in materials and mechanisms acting during stress

Your professional partner

The Units in our Department

High Temperature Materials Testing

High-temperature materials testing is done to demonstrate the material behavior at high temperatures by adequate experiments. As a rule, time-dependent, inelastic deformation plays a decisive role here. This must be determined by high-precision measurement technology in order to be used as a basis for the adaptation of material models and for evaluations. This includes standard tests under uniaxial, purely static, or cyclic as well as superimposed loading at elevated temperatures. Using unique solutions, which are developed and realized in-house, tests can be carried out on a component level with complex loads from stresses, internal pressures, or bending moments. Our experienced team provides you with comprehensive support for your individual problem, from the development of the optimum measurement and testing concept to the practical implementation and evaluation of the measured data.

Material Models and Microstructure Calculation

We offer to investigate and elucidate processes and mechanisms in materials on several length scales under loading. The understanding of the interactions between the microstructure and the deformation and damage behaviour enables a reliable estimation of the component lifetime and provides the basis for the creation of „tailored materials“ with desired properties profiles.

High Speed Loading

The unit High Rate Loading does experimental and numerical research on material and component behaviour at elevated loading rates.
Fields of application are crash simulation, safety analyses at impact load and process simulation for manufacturing.

Tasks and technical focus

Our department offers a comprehensive range of services in the field of experimental testing and numerical calculations of material behavior. You can find out more about the services we offer here or contact us by phone or email!

  • High rate flow properties (e.g. tensile test according to ISO 26203-2)
  • Fracture mechanics tests and damage mechanics at elevated loading rates (e.g. ASTM E1921)
  • Impact tests on components (drop tower, crash)
  • Development, validation and implementation of rate and temperature dependent material and damage models, considering multiaxial stress and Lode angle
  • Determination of material parameters for empirical and phenomenological models  (Johnson-Cook, Zerilli-Armstrong, Voce, Wierzbicki)
  • Numerical simulation of impact events and loadings
  • Experimental and numerical simulation of high rate processing (High rate forming, machining and cutting)
  • 2D and 3D FE-software for modelling of deformation and damage behaviour in idealized and real microstructures
  • Molecular Dynamics simulation software IMD
  • Software for 3D microstructure reconstruction based on tomograms and generation of simulation models
  • Damage mechanical material models for ductile fracture description (e.g. Rousselier model) and brittle fracture description (e.g. Beremin approach)
  • Simulation/network generation and evaluation programs (ABAQUA/CAE,ANSYS,ADINA,PATRAN with interfaces to all common CAD systems
  • Access to high-performance computers at the High Performance Computing Centre Stuttgart (HLRS)

 

Our services at a glance

We do fundamental and applied research on material behavior to support industrial activities and develop unique solutions to solve your material related problems.

Our activities include:

  • Molecular dynamics simulation for the analysis of deformation induced martensite transformation
  • Microstructure investigations and derivation of materials parameters relevant for the development of constitutive laws
  • 2D/3D-modelling of materials mechanical behaviour based on microstructural effects
  • Fracture mechanics at elevated loading rates
  • Development of solutions for implementing component tests at high temperatures
  • Development and optimization of constitutive laws including damage behaviour
  • Generation and optimization of simulation models using the finite element method (FEM)
  • Linking of process-simulation and microstructure mechanics
  • Verification of the Master Curve Method at elevated loading rates
  • Deformation and failure behaviour of thin-walled piping under detonation load

As a part of our corporate social responsibility, we actively participate in technical committees, boards, and panels. Thanks to our independence, we contribute to guidelines and standards with essential findings in research, development, and application.

  • Test facility in the Research Association for High-Temperature Steels and Materials (German Forschungsvereinigung Warmfeste Stähle und Hochtemperaturwerkstoffe (FVWHT))
  • European-Collaborative-Creep-Committee (ECCC)
  • ISO/TC 164 “Mechanical testing of metals”
  • ISO/TC 164/SC 01/WG 07 "Tensile testing at high strain rates"
  • ISO/TC 164/SC 04 “Toughness Testing”
  • German national DIN mirror committees of ISO/TC 164/SC 01 (NA 062-01-42) and ISO/TC 164/SC04 (NA 062-01-46)
  • ASTM Committee E08 on Fatigue and Fracture
  • NA 062 DIN Standards Committee Materials Testing (NMP)
  • NA 062-01-42 AA Working Committee Tensile and ductility testing of metals
  • NA 062-01-46 AA Working Committee Fracture Mechanics
  • Large component testing up to 2.5 m length up to 700°C
  • Large testing machines up to 5 MN
  • Corrosion test bench for generating supercritical steam parameters
  • Strain-controlled internal pressure tests at high temperature
  • Servo-hydraulic High Rate tensile testing machine 100kN up to 20 m/s
  • Including temperature chamber -100°C to +300°C, suitable for optical measurements
  • Split Hopkinson Pressure Bar apparatus
  • Drop towers up to 20 kJ / 10 m drop height
  • High-speed cameras up to 2 million frames per second
  • Strain gauge amplifier with bandwidth up to 1 MHz
  • Force measurement devices for high rate loading

Contact

This image shows Andreas Klenk

Andreas Klenk

Dr.-Ing.

Deputy Director, Commercial Director

This image shows Daniela Dosch

Daniela Dosch

 

Secretary

 

More contacts

Department Materials Behavior and Materials Modelling

To the top of the page