Session Details
MS07-1: Computational Mechanics and Biomimetics (Ganzes Minisymposium anzeigen)
Friday, 13. October 2017; 08:30 - 10:30 Uhr in Raum 7.22
Sitzungsleitung: Annette Birkhold
08:30
Plant-inspired compliant actuation
Anja Mader (University of Stuttgart), Annette Birkhold (Siemens Healthineers), Marco Caliaro (University of Freiburg), Olga Speck (University of Freiburg), Oliver Röhrle (University of Stuttgart), Jan Knippers (University of Stuttgart)
Kurzfassung:
Compliant systems with an integrated actuation allow adaption to varying requirements. In this context the cellular structure of plants is a valuable source of inspiration. Plant cells are hydraulic systems that can serve as actuators. Specialized motor cells change volume and shape depending on the internal cell pressure. Besides that the stiffness of parenchymatous plant tissues can change with turgor. Inspired by this a cellular pressure driven actuator capable of varying shape and stiffness can be developed.
Plant-inspired compliant actuation
Anja Mader (University of Stuttgart), Annette Birkhold (Siemens Healthineers), Marco Caliaro (University of Freiburg), Olga Speck (University of Freiburg), Oliver Röhrle (University of Stuttgart), Jan Knippers (University of Stuttgart)
Kurzfassung:
Compliant systems with an integrated actuation allow adaption to varying requirements. In this context the cellular structure of plants is a valuable source of inspiration. Plant cells are hydraulic systems that can serve as actuators. Specialized motor cells change volume and shape depending on the internal cell pressure. Besides that the stiffness of parenchymatous plant tissues can change with turgor. Inspired by this a cellular pressure driven actuator capable of varying shape and stiffness can be developed.
08:50
Modelling functional properties of frost-resistant plant tissues for transfer to construction materials
Lukas Eurich (University of Stuttgart), Arndt Wagner (University of Stuttgart), Wolfgang Ehlers (University of Stuttgart)
Kurzfassung:
While frost is a common threat for construction materials, plants have developed strategies to cope with freezing processes. In this contribution, a biologically motivated rigorous modelling approach of a multicomponent aggregate is presented using the framework of the Theory of Porous Media. For a selected numerical example, crucial effects of plants with regard to frost resistance, such as the cell dehydration and the water management, are discussed.
Modelling functional properties of frost-resistant plant tissues for transfer to construction materials
Lukas Eurich (University of Stuttgart), Arndt Wagner (University of Stuttgart), Wolfgang Ehlers (University of Stuttgart)
Kurzfassung:
While frost is a common threat for construction materials, plants have developed strategies to cope with freezing processes. In this contribution, a biologically motivated rigorous modelling approach of a multicomponent aggregate is presented using the framework of the Theory of Porous Media. For a selected numerical example, crucial effects of plants with regard to frost resistance, such as the cell dehydration and the water management, are discussed.
09:10
Upscaling of Self-actuated Wooden Bilayers
Philippe Grönquist (ETH Zürich), Falk K. Wittel (ETH Zürich), Markus Rüggeberg (ETH Zürich)
Kurzfassung:
The hygroscopic and rotational-orthotropic material wood can be used for generating bending motions of cross-ply structures in response to moisture content variations. We investigate the general behavior and the upscaling of such self-actuated wood bilayer structures by a combined experimental and simulation study using Finite element models, including the mechanical behavior of wood and the adhesive bonding. The aim is the manufacturing of complex curved wood parts by self-actuation.
Upscaling of Self-actuated Wooden Bilayers
Philippe Grönquist (ETH Zürich), Falk K. Wittel (ETH Zürich), Markus Rüggeberg (ETH Zürich)
Kurzfassung:
The hygroscopic and rotational-orthotropic material wood can be used for generating bending motions of cross-ply structures in response to moisture content variations. We investigate the general behavior and the upscaling of such self-actuated wood bilayer structures by a combined experimental and simulation study using Finite element models, including the mechanical behavior of wood and the adhesive bonding. The aim is the manufacturing of complex curved wood parts by self-actuation.
09:30
Cellular Solids in sea urchin spines: Numerical analyses and parametric modelling
Immanuel Schäfer (University of Stuttgart), Siegfried Schmauder (University of Stuttgart)
Kurzfassung:
Sea urchin spines show a complex hierarchical lightweight structure which consists of porous calcium carbonate. They can resist high mechanical loads and when getting compressed, they show a graceful failure behavior. Numerical analysis starts with generating models of sea urchin spine parts based on CT-images. The second approach is based on parametric modelling, to create cellular solids with varied parameters. These are then used in simulations to analyze the influence of the microstructure.
Cellular Solids in sea urchin spines: Numerical analyses and parametric modelling
Immanuel Schäfer (University of Stuttgart), Siegfried Schmauder (University of Stuttgart)
Kurzfassung:
Sea urchin spines show a complex hierarchical lightweight structure which consists of porous calcium carbonate. They can resist high mechanical loads and when getting compressed, they show a graceful failure behavior. Numerical analysis starts with generating models of sea urchin spine parts based on CT-images. The second approach is based on parametric modelling, to create cellular solids with varied parameters. These are then used in simulations to analyze the influence of the microstructure.