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Robotic Insertion of Timber Joints using Visual Detection of Fiducial Markers
(2020)ISARC Proceedings ~ Proceedings of the 37th International Sympsoium on Automation and Robotics in Construction (ISARC)Timber building industry is facing a major transformation with digitalization and automation being more broadly adopted. Prefabricated timber frame structures can be mass-produced on large robotic assembly lines, increasing the productivity and competitiveness of wood over standard inorganic materials such as steel or concrete. While standardization is likely to limit creativity, new digital tools, on the contrary, give the possibility ...Conference Paper -
Modelling Workflow for Segmented Timber Shells Using Wood-Wood Connections
(2020)Impact: Design With All SensesThis paper presents a modelling method based on planarization for double-curved segmented timber shell made from quad polygons and assembled by wood-wood connections. The inspiration is taken from timber dome structures [1, 2], where solid timber walls were built from planks, connected side by side. Furthermore, the research is based on a collaboration with a local timber company located in a mountain area. In this context, timber has a ...Conference Paper -
Material properties of features produced from EN AW 6016 by wire-arc additive manufacturing
(2020)Procedia Manufacturing ~ 23rd International Conference on Material FormingWire-arc additive manufacturing is an additive manufacturing technology which allows for high deposition rates and is well suited for manufacturing larger parts in a short time compared to other additive manufacturing technologies. The technology has already received considerable industrial take-up for various materials and applications. The aim of this work is to investigate the alloy EN AW 6016 as wire stock for WAAM. To establish this, ...Conference Paper -
Development of tool paths for multi-axis single stage incremental hole-flanging
(2020)Procedia Manufacturing ~ 23rd International Conference on Material FormingIn this paper, multi-axis single stage incremental hole-flanging is explored in place of three axis multi-stage tool paths in order to prevent flange conicity in hole-flanging by single point incremental forming (SPIF). The angle of inclination of the forming tool, the starting radius and step size of the tool paths are varied to investigate the feasibility of new tool paths. Using the proposed tool paths, an optimization is performed by ...Conference Paper -
On the potential of using selective laser melting for the fast development of forging alloys at the example of waspaloy
(2020)Procedia Manufacturing ~ 23rd International Conference on Material FormingForged high-performance components form the basis of technical innovations in the energy and transport sector. Great efforts are undertaken to develop new materials for forging, aiming at optimizing both the material performance and the effort needed for materials processing. The development of new forging alloys is accomplished using computational methods in combination with experimental techniques. The experimental characterization is ...Conference Paper -
On the numerical prediction of process-dependent properties of current high-performance materials with material model *MAT_254 in LS-DYNA
(2020)Procedia Manufacturing ~ 23rd International Conference on Material FormingOver the last years, the forecast quality in production and especially (cold) forming simulations has reached a high level at least for standard materials. It has become state-of-the-art to take the results of these process simulations into account e.g. for crashworthiness analyses. For most of the currently used high-performance materials, however, the manufacturing processes do not only result in plastic deformation and thinning of the ...Conference Paper -
Mathematical modeling and optimization for powder-based additive manufacturing
(2020)Procedia Manufacturing ~ 23rd International Conference on Material FormingIn powder-bed additive manufacturing, a laser beam melts a thin layer of metallic powder, which solidifies during cooling and bonds to the already processed solid material. After finishing one layer, the surface is covered with a new thin powder layer, and the melting process iterates, until an entire three-dimensional object emerges. Current scanning strategies are not optimized with respect to certain optimality criteria such as ...Conference Paper -
Prediction of mechanical properties of Ti-6Al-4V forgings based on simulation of microstructure evolution
(2020)Procedia Manufacturing ~ 23rd International Conference on Material FormingTitanium alloys are widely used in the aerospace industry as a structural material. Since this application is critical, the titanium alloys must have high mechanical properties both at room and at elevated temperatures. The thermomechanical processing of titanium alloys during forging determines the microstructure of the manufactured parts to a large extend. The final mechanical properties are attained by the subsequent heat treatment. ...Conference Paper -
Rule-based path identification for direct energy deposition
(2020)Procedia Manufacturing ~ 23rd International Conference on Material FormingAdditive Manufacturing (AM) provides the possibility to produce complex part geometries on a layer-by-layer basis. In AM processes, a heat source moves over the part to either deposit powder or wire feedstock or to melt thin powder layers that are spread onto a powder bed. The moving heat source inevitably creates an inhomogeneous temperature distribution, which affects the residual stresses, part distortion, and local mechanical properties. ...Conference Paper -
Hot workability of a spark plasma sintered intermetallic iron aluminide alloy above and below the order-disorder transition temperature
(2020)Procedia Manufacturing ~ 23rd International Conference on Material FormingThe Fe-25Al-1.5Ta alloy has proved to be qualified for structural applications at and above 600°C due to a superior creep resistance to its binary counterpart. The creep resistance of the Fe-25Al-1.5Ta alloy at 650°C surpasses that of the P92 martensitic-ferritic steel, which is one of the most developed creep resistant alloys for steam turbine applications. From the viewpoint of cost-effectiveness in real-scale forgings, it is important ...Conference Paper