Institute of Mechanics

Development of a Design Tool for Flow Diverter Devices

• Trivariant NURBS representation of Flow Diverter Devices
• Contact simulations based on Isogeometric Analysis
• Explicit and implicit transient computations
• Shape Memory Alloys
• BMBF joint research project BELUCCI 

Active and passive vibration and noise reduction on machines and structures

• Design, simulation and testing of active controlled systems
• Design optimization using passive measures

• Vibration and acoustic measurements
• Measurement of frequency-dependent material parameters (stiffness and damping)

Modeling of fracture mechanics

• Phase field methods
• Brittle fracture
• Ductile fracture
• Crack propagation in polycrystalline materials

• Crack propagation in rubber-like materials, large deformations

• Crack propagation with the help of adaptive Finite-Element-Methods

Analysis of electrical drives and machines

• Computation of electromagnetic stimulation and performance
• Usage of this performance studies for numerical vibration analysis

• Calculation of acoustic behaviour of the electrical machines
• Comparison of different configurations to identify the optimal design

Development of new computational methods and software solutions

• Finite element methods for nonlinear and complex problems
• Explicit and implicit transient computations
• Finite element methods with high-order shape functions (p-FEM, SEM, IGA)
• Fictitious area methods (FCM, SCM)

• Semi analytical methods (SAFE, SBFEM)
• Multi-field problems (Thermo-Piezoelektrizität, Fluid-Struktur-Interaktionen)
• Structural computations/-optimization (strength, crash, stability, acousitcs, heat conduction, electromechanics)
• Medical engineering and biomechanics

Mechanical characterization of materials

• Phase field methods
• Computation and design of fiber composite structures (CFK, GFK) and sandwich sttructures
• Micro-macro models
• Numerical homogenization methods

• Fiber and particle reinforced materials, foams, porous media
• Continuum mechanics
• Extended material modeling
• Elastomers

Modeling of mixing and demixing processes

• Phase field simulations
• Diffusion models including the interface energy
• Mixing behavior of polymers
• Mixing behavior in the presence of mechanical loads

• Investigation of the influence of the kinematics at large strains
• IGA for sufficient inter-element continuity when dealing with higher order differential equations

Modeling of oxidation processes including mechanical couplings

• Phase field method for modeling oxidation processes
• Diffusion laws for simulating the oxygen supply to trigger oxidation processes locally
• Considering reaction kinetics

• Shrinkage caused by oxidation (cf. figure)
• Varying material properties dependent on the oxidation state
• Calculation of stress distributions due to local oxidation and shrinkage

Modeling of solidification processes

• Phase-field simulation of solidification processes using finite element methods
• In cooperation with Institute of Materials and Joining Technology (IWF)

Holistic simulation approaches for acoustic evaluation of components and machines

• Detailed analysis of the crank mechanism with the help of a elastic multi-body simulation
• Consideration of elasto-hydrodynamic interactions in the context of multi-body analysis
• Cooperation with Chair of Technical Dynamics

• Making the simulation results audible
• Evaluation considering the auditory perception of the human being

Evaluation of pores in castings

• Distribution of the pores are detected by CT scans and transferred to an STL dataset
• Pores are taken into account in load-relevant areas of the component in order to investigate their effect

• Cost-effective and reliable predictions regarding to material utilization and loading
• Inclusion of the microstructure of heterogeneous and cellular material systems in numerical analysis

Structural Health Monitoring (SHM), Ultrasnic waves/Lamb waves

• Use of high frequency guide waves for structure monitoring
• Particularly for fiber composite materials, damage monitoring is of great importance
• The methods can also be used for all other material classes

• Numerical and experimental analysis of wave propagation and damage mechanisms
• Simulation and design of piezoelectric sensor and actuator networks

Experimental Analysis

• Stress-strain measurements, strain gauges, hydro-pulse system, tensile tests
• Vibration and acoustic measurements (3D-Laservibrometer, Derotator, In-plane Vibrometer)

• Directional characteristic measurements in the far field
• Free field space, microphone arrays

• Measurement of frequency-dependent material parameters
• Impact hammer, accelerometer

Research projects of the chair

• under the direction of Prof. Dr.-Ing. Daniel Juhre

• under the direction of Dr.-Ing. Sascha Eisenträger

• under the direction of Prof. Dr.-Ing. Dr. h. c. Ulrich Gabbert