Examinando por Materia "BIOMIMESIS"
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- Ponencia en CongresoCombining additive manufacturing and biomimetics for the optimization of satellite structures(2018-10) Vogel, Daniel; Geismayr, L.; Langer, Martin; Leslabay, Pablo; Schlickc, G."Successful utilization of Additive Manufacturing (AM) in the space sector implicates two aspects: First, an understanding of the process inherent characteristics has to be developed, where the anisotropic behavior of material is of significant importance. Second, the part design methodology has to be adapted, since it is often coupled and limited to traditional shapes and production methods and thus prevent an exploitation of the full AM potential. In a research collaboration between the Technical University of Munich, the Instituto Tecnológico de Buenos Aires, and the Fraunhofer Research Institution for Casting, Composite and Processing Technology, the structural optimization of a microsatellite yielded in research in both areas. In this paper the evaluation of the Total Mass Loss (TML), Coefficient of Thermal Expansion (CTE) and tensile strength for the materials polyether-ether-ketone (PEEK) and Ti6Al4V, which are both relevant for space applications, will be reported. Tensile and dilatometer specimen with orthogonal placement on the build platform for all three printing directions were produced via Fused Deposition Modelling (FDM) for PEEK and laser powder bed fusion (L-PBF) for Ti6Al4V in accordance to national standards. Outgassing tests of the specimen show that the TML for both materials is below the limit of 1%. CTE values deviate 13% from the manufacturers’ specified mean value for injection molded PEEK. Mean tensile strength values for PEEK were 57% worse than the injection molded values specified by the manufacturer. Ti6Al4V samples showed no anisotropy and fitted the expected values for both, CTE and tensile strength. The overall results indicate the need for additional tests and safety factors when using additive manufactured PEEK for space applications. The second part of this paper presents a holistic design approach, composed of several already known methodologies. For the selection of suitable part candidates for AM specific redesign, different parts and assemblies in terms of manufacturability, economic feasibility and the potential of functional improvements were compared. For the subsequent part redesign, a biomimicry inspired design methodology in combination with AM design rules was applied, overcoming common thinking patterns. The approach was verified through a case study, where a star tracker’s housing was systematically redesigned. The new design includes an integrated thermal link, which helps to keep the commercial off the shelf (COTS) sensor at low temperatures during operation, and an integrated compliant mechanism for the fine adjustment of the sensor. Finally, the design was validated through thermal analysis in ESATAN-TMS and structural analysis in ANSYS."
- Artículo de Publicación PeriódicaSystemic innovation, education and the social impact of the systems sciences(2017-09) Laszlo, Alexander; Luksha, Pavel; Karabeg, Dino"Education, in and of itself, is neither irrelevant nor outmoded. However, the current need to educate a planetary citizenry under conditions relevant to the living context of our planet is palpable. A new education paradigm is emerging to address this need, and it takes its cue from the life sciences—biomimicry, ecosystem studies, permaculture and the like, and from the sciences of complexity—complex adaptive systems theory, second order cybernetics, social systems dynamics and the emerging field of systemic innovation. This article explores both the pressures for such a new paradigm of education, tracing their sources to contemporary dynamics in society and environment, and outlines of the new paradigm in education that is emerging in various parts of the world. Key to this new paradigm is the emphasis on lifelong learning and empathy oriented education, both critical ingredients to the transformative role of education for individual and collective thrivability."