20 research outputs found
Restraining actively-bent structures by membranes
Membranes can be used to restrain actively-bent structures. The paper explains the structural behaviour behind using membranes to couple actively-bent elements and analyses the influence of different parameters
Restraining actively-bent structures by membranes
Membranes can be used to restrain actively-bent structures. The paper explains the structural behaviour behind using membranes to couple actively-bent elements and analyses the influence of different parameters
Das magnetische Verhalten von Einkristallen aus Fe?Al-Legierungen im �berstrukturgebiet Fe3Al. II. Magnetostriktion und spez. Widerstand
On the design and construction of elastic gridshells with irregular meshes
International audienceDespite the time and cost advantages by the manufacture, transport and assembling of elastic gridshells, high material stresses are induced on the structures during their shaping process. An optimisation of the grid arrangement in order to reduce the curvature of the grid profiles and with it the initial bending stresses is therefore crucial when considering the stress reserves under subsequent external loading.To be able to deploy and bend the structure as a whole grid and thereby accelerate their construction process, elastic gridshells usually exhibit constant mesh size (regular gridshells). However, this condition makes the optimisation of regular gridshells only possible until a certain level. In this paper, several double-curved gridshells have been optimised allowing variation on the mesh size (irregular gridshells), so that a further reduction of the profiles' curvature and lower concentration of stresses could be obtained.By the construction of irregular gridshells, the grid profiles are normally independently bent in an incremental process, generally more time-consuming than by regular gridshells. Nevertheless, if the bending stiffness of the grid profiles is low enough, large deformations can be induced on the irregular meshes and the structures can be built by bending the whole grid. The stresses generated during the construction process must be previously controlled, e.g. using numerical simulation. For this paper, the erection process of an elastic hemisphere with irregular mesh and 10m diameter has been analysed by means of finite element modelling and tested on a 1:1-prototype. The comparison of the resulting geometry and load-bearing behaviour between the modelled and real structures are presented
Immunocytochemical localization of alkane-inducible cytochrome P-450 and its NADPH-dependet reductase in the yeast Candida maltosa
Comparison of two cytochromes P-450 from Candida maltosa: primary structures, substrate specificities, and effects of their expression in Saccharomyces cerevisoae on the proliferation of the endoplasmic reticulum
Designing CNC knit for hybrid membrane and bending active structures structural membranes 2015
Recent advances in computation allow for the integration of design and simulation
of highly interrelated systems, such as hybrids of structural membranes and bending active
elements. The engaged complexities of forces and logistics can be mediated through the
development of materials with project specific properties and detailing. CNC knitting with
high tenacity yarn enables this practice and offers an alternative to current woven membranes.
The design and fabrication of an 8m high fabric tower through an interdisciplinary team of
architects, structural and textile engineers, allowed to investigate means to design, specify,
make and test CNC knit as material for hybrid structures in architectural scale. This paper
shares the developed process, identifies challenges, potentials and future work