Making efficient and safe use of composites

Composite Materials

We investigate the relationship between the structure and properties of composite materials with polymer, ceramic and metal matrices, in order to assess their operational behavior. Our testing concepts account for microstructure and real loads. The sample data is translated to real components through a combination of experimental and numerical methods. Newly developed material models enable us to predict the operational and failure behavior of composites and components and subsequently save time and money during material and component development.

Services

Identification of the mechanical and fracture mechanical parameters of composite materials taking account for anisotropy and operational conditions

Mechanical assessment of composites with polymer, ceramic and metal matrices, GFK, CFK, CMC, MMC and foamed and cellular materials

Development of testing concepts for newly developed composites and composite components bearing in mind the effects of temperature, creep, fatigue or multi-axial loading

Numerical modeling to determine the relationship between microstructure and properties, and prediction of material behavior

Development and implementation of material models for composites that account for all the relevant environmental and load scenarios for use in conventional FEM systems

Simulation of the operational and failure behavior of composite components

Material optimization

Topics

 

Safe composite materials – mechanical characterization

 

The mechanical properties of composite materials with polymer, metal or ceramic matrices are measured under operational conditions – be it quasi-static, cyclical or dynamic loads under tensile, compressive, shear or flexural loads. We perform standardized tests and can define testing concepts that are appropriate to the particular demands of the materials...

 

Numerical simulation of composite materials and components

 

Numerical simulation is an important tool with which to reduce the experimental costs associated with material and component development. Simulations of the microstructure of composites reinforced with fibers and particles make it possible to reliably predict and optimize the thermal and mechanical properties of modern materials such as long-fiber thermoplastics (LFT) and fiber ceramics. Component properties are modified in component simulations to ...

 

Characterization and modeling of creep in composite materials

 

Composite materials with a thermoplastic matrix have a range of attractive properties, but are subject to creep deformation at higher temperatures. The creep behavior of fiber-reinforced polymers can be determined in retardation trials under tensile, compressive and flexural loads in a controlled atmosphere (temperature and humidity) according to DIN EN 843. Displacement transducers or optical measuring techniques continuously ...

 

Testing concepts for ceramic composite materials

 

The inherent homogeneity and anisotropy of ceramic composites (CMC) makes it a challenge to determine the material parameters needed for component design. The latest developments such as short fiber reinforced CMCs, extreme operating conditions and manufacturing-related limitations to sample geometry mean that CMCs need to be tested and assessed in modified trials such as diametral compression tests. Together with ...

 

 

 

Probabilistic material and component simulation

 

Many composites, such as those reinforced with short or long fibers or solid foams, have a marked disordered microstructure and, as a result, demonstrate widely varying material behavior. Modern probabilistic simulation methods on the basis of the known variance of microstructural properties can reliably predict the expected variance of material properties. Similarly, a probabilistic component simulation can be used to predict the variance in component ...

 

 

 

Publications regarding Composite Materials


Contributions to newspapers, books and conferences as well as dissertations and project reports...