PUMA publications for /user/itke/ComputerWed Feb 01 11:30:31 CET 2023Heritage ScienceApplication‑based principles of islamic geometric patterns; state‑of‑the‑art, and future trends in computer science/technologies: a review((2023) 11:222023Islamic körner Aesthetic-based Structural patterns 2023 knippers mahdavinejad Application-based ranjazmay technology bemanian science azari itke from:petraheim Computer geometric principles Sustainable architecture Currently, there is a tendency to use Islamic Geometric Patterns (IGPs) as important identities and cultural elements of building design in the Middle East. Despite high demand, lack of information about the potential of IGPs principles have led to formal inspiration in the design of existing buildings. Many research studies have been carried out on the principles of IGPs. However, comprehensive studies relating to new possibilities, such as structure-based, sustainablebased, and aesthetic-based purposes, developed by computer science and related technologies, are relatively rare. This article reviews the state-of-the-art knowledge of IGPs, provides a survey of the main principles, presents the status quo, and identifies gaps in recent research directions. Finally, future prospects are discussed by focussing on different aspects of the principles in accordance with collected evidence obtained during the review process.Tue Jan 17 13:24:46 CET 2023Alfonso XII, 3; 28014 Madrid, SpainJournal of the International Association for Shell and Spatial Structuresdec4272 - 288Timbr Foldr – A Design Framework and Material System for Closed Cross - Section Curved Folded Structures632022Structures Structural magna knippers 2022 Transformable framework Spatial itke material from:petraheim klammer Bending-Active rihaczek Aided Free-Form curved basnak Retractable körner Digital Deployable Timber Optimization origami Design Additive Manufacturing Computer This research investigated building components that can be produced and transported in a flat state and transformed to a spatial state without scaffolding on-site. Curved folding was employed to allow for a shape change between flat and spatial bending active structures. Bending generally allows for expressive curvature with simple flat production as well as easy customization. Limitations presented by laborious forming and upscaling of individually bent plates were overcome by large-scale curved folding. The present research builds upon the context but adds a design framework for volumetric curved folded components, a bistable behavior, and comprehensive detailing regarding upscaling and increased structural capacity. The mechanism was studied on a kinematic level, considering geometrical rules of curved folding and the design space. It was also studied on a kinetic level under the consideration of material properties specific to plywood. As a proof of concept, a 1:1 scale demonstrator was built. Finite element modeling software was used to optimize the shape. The demonstrator was fabricated flat, folded up, and locked in its stable configuration by the bistability and bases. It supported twelve people with a self-weight of approximately 300kg.