Universität Stuttgart
Permanent URI for this communityhttps://elib.uni-stuttgart.de/handle/11682/1
Browse
12 results
Search Results
Item Open Access Designing actuation concepts for adaptive slabs with integrated fluidic actuators using influence matrices(2022) Nitzlader, Markus; Steffen, Simon; Bosch, Matthias J.; Binz, Hansgeorg; Kreimeyer, Matthias; Blandini, LucioPrevious work has shown that floor slabs make up most of the material mass of building structures and are typically made of reinforced concrete. Considering the associated resource consumption and greenhouse gas emissions, new approaches are needed in order to reduce the built environment’s impact on the ongoing climate crisis. Various studies have demonstrated that adaptive building structures offer a potential solution for reducing material resource consumption and associated emissions. Adaptive structures have the ability to improve load-bearing performance by specifically reacting to external loads. This work applies the concept of adaptive structures to reinforced concrete slabs through the integration of fluidic actuators into the cross-section. The optimal integration of actuators in reinforced concrete slabs is a challenging interdisciplinary design problem that involves many parameters. In this work, actuation influence matrices are extended to slabs and used as an analysis and evaluation tool for deriving actuation concepts for adaptive slabs with integrated fluidic actuators. To define requirements for the actuator concept, a new procedure for the selection of actuation modes, actuator placement and the computation of actuation forces is developed. This method can also be employed to compute the required number of active elements for a given load case. The new method is highlighted in a case study of a 2 m × 2 m floor.Item Open Access Challenges of using augmented reality to support an efficient and error-free assembly in complex variant environments(2023) Dausch, Valesko; Roth, Daniel; Kreimeyer, Matthias; Bohr, SebastianItem Open Access Function integration in additive manufacturing: a review of approaches(2023) Tüzün, Gregory-Jamie; Roth, Daniel; Kreimeyer, MatthiasItem Open Access Classification of methodologies for design for circular economy based on a literature study(2023) Stölzle, Merlin Gerald; Roth, Daniel; Kreimeyer, MatthiasItem Open Access An investigation of increased power transmission capabilities of elastic-plastic-designed press-fit connections using a detachable joining device(2024) Falter, Jan; Herburger, Daniel; Binz, Hansgeorg; Kreimeyer, MatthiasDrive systems are an important part of general mechanical engineering, automotive engineering, and various other fields, with shaft–hub connections being an important part of such systems. Decisive aspects in the development of such systems today are, for example, high transmittable forces and torques, low masses, and the cheapest possible production of components. A possibly threefold increase in the force and torque transmission capacity can be achieved by using press-fit connections with an elastic-plastic design as opposed to regular elastically designed alternatives. An elastic-plastic design of the press-fit connection is achieved by using a large interference. A large transition geometry on the shaft (which replaces the conventional chamfer) is required to join such an interference. The material and space requirements have a negative impact on lightweight applications and limited building spaces. Therefore, the objective of the research presented in this paper is to design and analyze a detachable joining device that substitutes this geometry. A simulation study was conducted to determine the geometry of the joining device that improves the stress state and consequently the force and torque transmission capacity of the connection. Moreover, the influence of manufacturing tolerances of the joining device and the shaft, corresponding risks, and measures to mitigate them are analyzed using finite element analysis. The results show that large transition radii, enabled by using a joining device, lead to a homogenous distribution of plastic strain and pressure in the press-fit connection, even for large interferences ξ and soft hub materials like wrought aluminum alloys. The influence of manufacturing tolerances on the stress state was quantified, leading to design guidelines that minimize the risk of, e.g., the front face collision of a shaft and hub, while maximizing the power transmission of the connection. The results show the capability of a detachable joining device to enable elastic–plastic press–fit connections and the corresponding threefold increase in the force and torque transmission capacity in lightweight applications, resulting from the substitution of the installation space consuming and mass increasing the transition geometry of the shaft.Item Open Access Implementation of a design guideline for aluminum foam sandwich based on industrial demands(2023) Hommel, Patrick; Roth, Daniel; Binz, Hansgeorg; Kreimeyer, MatthiasItem Open Access Barriers to the use of artificial intelligence in the product development : a survey of dimensions involved(2023) Müller, Benedikt; Roth, Daniel; Kreimeyer, MatthiasItem Open Access Requirements for a smart product-service system development framework(2023) Paliyenko, Yevgeni; Heinz, Daniel; Schiller, Christian; Tüzün, Gregory-Jamie; Roth, Daniel; Kreimeyer, MatthiasItem Open Access Artificial intelligence techniques for improving cylindrical shrink-fit shaft-hub couplings(2023) Saeed, Muhammad Shahrukh; Falter, Jan; Dausch, Valesko; Wagner, Markus; Kreimeyer, Matthias; Eisenbart, BorisItem Open Access Systematic classification of adaptive façades : preparing a database(2023) Voigt, Michael P.; Roth, Daniel; Kreimeyer, Matthias