A5036665662- Advanced Welding Techniques Analysis
- Mechanical Behavior of Composites
- Metal Forming Simulation Techniques
- Mechanical stress and fatigue analysis
- Additive Manufacturing and 3D Printing Technologies
- Advanced machining processes and optimization
- Metallurgy and Material Forming
- Structural Load-Bearing Analysis
- Composite Material Mechanics
- Hydraulic and Pneumatic Systems
- High Entropy Alloys Studies
- Welding Techniques and Residual Stresses
- Numerical methods in engineering
- Fuel Cells and Related Materials
- Mechanical Engineering and Vibrations Research
- Additive Manufacturing Materials and Processes
Friedrich-Alexander-Universität Erlangen-Nürnberg
2021-2024
TU Dresden
2022
Mechanical joining technologies are increasingly used in multi-material lightweight constructions and offer opportunities to create versatile processes due their low heat input, robustness metallurgical incompatibilities various process variants. They can be categorised into which require an auxiliary element, or do not element. A typical example for a mechanical with element is self-piercing riveting. wide range of exist requiring This allows both point-shaped (e.g., by clinching)...
Clinching as a mechanical joining technique allows fast and reliable of metal sheets in large-scale production. An efficient design dimensioning clinched joints requires holistic understanding the material, process resulting properties joint. In this paper, chain for clinching is described experimental techniques are proposed to analyze process-microstructure-property relationships from sheet joined structure. At example aluminum EN AW 6014, characterization methods applied discussed...
Abstract The progressively more demanding needs of emissions and costs reduction in the transportation industry are pushing engineers towards use increasingly lightweight structures. This goal can be achieved only if dissimilar and/or new materials, including polymers composites, joined together to create complex Conventional fusion welding processes have often been proven inadequate this task because high heat input reducing joint mechanical properties or even making joining process...
Abstract Continuous Fiber Reinforced Thermoplastic (CFRT) hybrid parts offer interesting possibilities for lightweight application, which can exceed the capabilities of mono material metal or CFRT parts. In this case, joining technology oftentimes is limiting factor. This study investigates a operation with pin structures are additively manufactured via powder bed fusion featuring different diameters and tip geometries, inserted into locally infrared heated part. The resulting fiber...
In conjunction with mechanical joining processes. Mechanical processes play a key role for the realization of multi-material lightweight structures, which are essential regard to environmental protection. However, dissimilar high-strength materials is challenging due varying properties partners and their high flow stresses often limited ductility. Thus, evolution established as well development innovative highly productive technologies necessary. Requirements volatile production environment...
Abstract The mass production of bipolar plates for electrolyzers and fuel cells is a central step towards the realization efficient cost-effective energy systems future. However, current processes are reaching their limits can hardly realize quantities that will soon be demanded, nor they scale up to required volumes. Particularly handling half-plates plates, major challenges expected, especially with regard rates. Existing have restricted scalability precision. Therefore, new stacking...
Due to stricter emission targets in the mobility sector and resulting trend towards lightweight construction order reduce weight consequently emissions, multi-material systems that allow a material be placed right quantity place are becoming increasingly important. One major challenge is holding back rapid widespread use of lack adequate joining processes suitable for dissimilar materials. Joining without auxiliary elements have advantage reduced assembly effort no additional added weight....
In this study, quasi-unidirectional continuous fiber reinforced thermoplastics (CFRTs) are joined with metal sheets via cold formed cylindrical, elliptical and polygonal pin structures which directly pressed into the CFRT component after local infrared heating. comparison to already available studies, unique novelty is use of non-rotational symmetric for CFRT/metal hybrid joining. Thus, a variation in orientation as well pins’ relation sample conducted. The created samples consequently...
Resource-saving and sustainable production is becoming increasingly important regarding social, political economic aspects, thus making the use of lightweight-construction technologies a current trend. For this reason, multi-material-systems made high-strength steel aluminium as well metal fibre-reinforced plastics gain in importance. However, different material properties, e.g. stiffness, thermal expansion coefficients or chemical incompatibilities, are challenging for conventional joining...
In this work, an innovative manufacturing approach that includes a fully linked and integrated system consisting of laser-based directed energy deposition (DED-LB/M) module forming press is presented. The alternating additive (AM) process based on combination DED-LB/M using laser power 600 W feed rate 400 mm/min subsequent process, in which the structure upset with hydraulic constant force 500 kN order to smooth surface influence accuracy components. For generation fundamental understanding,...
The paper presents research regarding a thermally supported multi-material clinching process (hotclinching) for metal and thermoplastic composite (TPC) sheets: an experimental approach to investigate the flow pressing phenomena during joining. Therefore, setup is developed compress TPC-specimens in out-of-plane direction with different initial TPC thicknesses varying temperature levels. deformed specimens are analyzed computed tomography resultant inner material structure at compaction...
Lightweight constructions become more and important, especially in the mobility sector. In this industry, increasingly strict regulations regarding emissions of carbon dioxide can be achieved to a certain extent by reducing vehicle weight. Thus, multi-material systems are used. Conventional joining techniques reach their limits when different materials due thermal expansion, unequal stiffness or chemical incompatibilities. This is why additional elements adhesives These must viewed...
Abstract In times of increasing global warming, the awareness necessity for significant CO 2 reduction is growing. Especially in transport and aerospace sector, lightweight construction has potential to achieve emission goals by reducing overall vehicle weight. Thereby, adding fibre-reinforced composites materials such as steel aluminium used weight savings. Furthermore, continuous-fibre-reinforced thermoplastics (CFRTs) begin replace more traditional thermoset due their easier bulk...
Increasing material costs, decreasing availability, and ever-higher demands on environmental compatibility complexity require new strategies in the development production of functional components. Consequently, a combined approach from areas design, science, manufacturing is mandatory, order to meet requirements. Reducing number parts, using lightweight materials applying hybrid components with multimaterial mix are possible solutions. Nevertheless, conventional joining operations like...
Abstract Due to increasingly strict emission targets and regulatory requirements, especially for companies in the transport industry, demand multi-material-systems is continuously rising order lower energy consumption. In this context, mechanical joining processes offer an environmentally friendly flexible alternative established methods, field of lightweight design. For example, cold-formed cylindrical pin structures show high potentials without auxiliary elements. The are joined either by...
The trend towards lightweight design, driven by increasingly stringent emission targets, poses challenges to conventional joining processes due the different mechanical properties of partners used manufacture multi-material systems. For this reason, new versatile are in demand for dissimilar materials. In regard, pin with cold extruded structures is a relatively new, two-stage process materials such as high-strength steel and aluminium well fibre-reinforced plastic systems, without need...
Pin extrusion is a common process to realise pin structures in different geometrical dimensions for subsequent joining operation. Nevertheless, the of offers limits regarding sheet thinning as consequence punch penetration depth into sheet. Thereby, cracks at residual thickness can occur during strength tests, resulting failure complete joint due severe thinning. Therefore, measures have be taken account reduce One possibility application orbital formed tailored blanks with local material...
Abstract. Lightweight design is increasingly used to combine the specific advantages of various dissimilar materials into multi-material systems. The aim make production more resource-efficient and reduce emissions. However, one challenge in adaptation systems lack versatile joining technologies capable these materials. Joining with cold formed pins a two-step process potential metal fibre-reinforced plastics (FRP). These can be joined using two strategies, direct pin pressing an...