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Composites

Corrosion fatigue characterization of laser structured Al/CFK hybrid composites

Duration: 2020 until 2023 Project partner: lia_dlr_wpt Sponsor: Deutsche Forschungsgesellschaft (DFG)

HerKoLas1HerKoLas2

The aim of the research project is the development of an energy-efficient manufacturing process for firmly bonded Al/-CFK hybrid composites in a single step by combined forming. To increase corrosion resistance a laser pre-treatment of the surface of the metallic component is evaluated for its effectivness by means of instrumented corrosion fatigue assessments. Mechanism-based characterisation of effective damage initiation and evolution processes helps to build up a basic understanding of the deformation and failure behavior of hybrid laminates.

For further information, please refer to:
M.Sc. Alexander Delp

 


 

Material and process development of high strength carbon-polyurethane-composite structures - purCONNECT

Duration: 2019 until 2021 Consortium:

2 Universities
4 Industrial Enterprises

Sponsor: BMWi_en_2

purCONNECT1purCONNECT2

Good abrasion and impact properties are required for the use of carbon fiber-reinforced plastics in exterior components of the aerospace and automotive industries. In the purCONNECT project, innovative processes for the production of carbon fiber-reinforced polyurethane using resin transfer molding (RTM) are being developed. Structures are characterized with regard to thermo-mechanical material behavior. For this purpose, quasi-static, highly dynamic and cyclic tests after impact are carried out in order to evaluate the structural integrity and estimate the remaining lifetime. The investigations are performed from -40 °C to 90 °C in order to determine the temperature influence on the material behaviour under operation-relevant temperatures.

For further information, please refer to:
M.Sc. Lars Gerdes

 


 

Mechanism-correlated characterization of the deformation and damage behavior of thermoplastic-based hybrid laminates for property-oriented process development

Duration: 2019 until 2021 Project partner: MeSH_projektpartner Sponsor: Deutsche Forschungsgesellschaft (DFG)
MeSH

Hybrid laminates made of thermoplastic fiber reinforced plastic and metal offer mechanical advantages over non-reinforced plastic-metal composites and, unlike hybrid laminates with a thermoset matrix, can be subsequently formed and used for multi-variant, continuous mass production. The aim of the research project is to describe the interaction between the consolidation process, structure, and the achievable fatigue and crack propagation properties of hybrid laminates made of carbon fiber reinforced thermoplastic and EN AW 6082. By simultaneously applying optical deformation, electrical resistance, thermal and acoustic emission measurement methods in fatigue tests, the Department of Materials Testing Engineering characterizes the material-specific fatigue behavior.

For further information, please refer to:
M.Sc. Selim Mrzljak

 


 

Development of screw-press-bonding in timber constructions – Spk Holz

Duration: 2018 until 2020 Project partner: hs_rheinmain Sponsor: Bundesministerium für Wirtschaft und Energie (BMWi)
Spk_Holz

Screw-press-bonding is an innovative joining technique, which allows realizing timber connections independently from size and location, whose potential is currently not sufficiently used due to strict restrictions. The research project aims to determine the pressure distribution in the joining area, by using a new pressure measuring system and optimize it by variation of the screw type and arrangement. For this, a finite element model will be developed to simulate the stress and geometry specific pressure distribution. The combination of the experimental and simulative investigations should lead in future to an economical way of realizing screw-press-bondings.

For further information, please refer to:
M.Sc. Ronja Scholz

 


 

Biomechanical qualification of the structurally optimized functional material Cottonid as an adaptive element

Duration: 2017 until 2020 Project partner: Wissenschaftszentrum Straubing Sponsor: Deutsche Forschungsgesellschaft (DFG)
cottonid1 cottonid2

                                                                             Source: FBP Straubing

The aim of the research project is the biomechanical qualification of cellulose-based Cottonid as an adaptive element in the thematic field of bio-architecture. The passive movements in reaction to moisture absorption and desorption will be evaluated qualitative and quantitative in rheological investigations concerning parameters like speed, maximum displacement and reproducibility. A focus lies on the characterization of process-structure-property-relationships with the help of material specific measurement and test techniques. This leads to a profound understanding of the biomechanics that can be transferred to other temperature- and moisture-dependent natural products.

For further information, please refer to:
M.Sc. Ronja Scholz

 


 

Fibre composite plastics and hybrid compounds – Lightweight design in transport engineering

DH_Hybridverbindung_Quelle_LiA_Paderborn_enDH_Korrosionsuntersuchungen
Source: LiA Paderborn

Lightweight design is gaining greater importance in many industrial sectors, in particular in automotive and aerospace industries. The aim is saving resources and fuel. Conventional material systems are insufficient to reach necessary weight reduction. Fibre composite plastics and multi-material-design, i.e. hybrid compounds, are combining the advantages of various materials, whereby components are reinforced partially or extensively and are optimized in regard to mechanical loads. The fatigue behaviour of fibre composite plastics and hybrid compounds are structure-based analysed and model-based described, using new measuring systems. The effect of service life extending and limiting influence factors are characterised in-situ.

For further information, please refer to:
Dipl.-Ing. Daniel Hülsbusch