Results 181 to 190 of about 7,008 (229)
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Auxetic Cellular Materials and Structures
Aerospace, 2005Auxetic materials and structures exhibit the very unusual property of becoming wider when stretched and narrower when squashed (i.e. they have a negative ‘Poisson’s ratio’). This property results in many beneficial effects in the characteristics of the system that make auxetics superior to conventional systems in many practical and high tech ...
Joseph N. Grima +4 more
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Auxetic warp knit textile structures
physica status solidi (b), 2012AbstractThe design, manufacturing and characterization of warp knit textile structures with enhanced drapeability and energy absorption is reported in this paper. Four textile structures were produced, all based on a triangular or double arrowhead structure, which is known to lead to a negative Poisson's ratioν.
Kim Alderson +5 more
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Mixed auxeticity of auxetic sandwich structures
physica status solidi (b), 2012AbstractPreviously, a sandwich structure in which the Poisson ratios of the core and facesheets possess opposite signs has been shown to exhibit overall conventional and auxetic behavior depending on the loading mode – axial loading or bending – for an intermediate range of relative core thickness.
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Development of spiral auxetic structures
Composite Structures, 2018Abstract An auxetic tow or fiber bundle that will expand in diameter when extended axially would be very useful. It could be woven into a shape-changing cloth, perhaps used for ballistic protection , or as an easily cleaned filter. To explore this concept, spiral fiber bundle structures under tension were explored. Theory describing the geometry of
Qian Ma, Larry D. Peel
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Pressure Sensors Developed Using Auxetic Structures
Volume 4: Advanced Materials: Design, Processing, Characterization and Applications; Advances in Aerospace Technology, 2023Abstract Auxetic structures have shown great potential in the development of pressure sensors, owing to their unique mechanical properties. Such structures exhibit a negative Poisson’s ratio due to controlled deformations in the opposite lateral direction to that of typical materials.
Brandon Yang +3 more
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Optimization of auxetic structures for MEMS applications
2016 17th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), 2016Complex inertial Micro Electro Mechanical Systems (MEMS) usually require the simultaneous motion of the masses in more than one direction and an overall linear behavior. Furthermore, since it is usually very difficult to actuate the device in all the required directions, complex spring configurations for the conversion of the motion are needed. Here we
BRUGGI, MATTEO +2 more
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Crush behaviour of auxetic cellular structures
Science and Technology of Materials, 2018Abstract The auxetic cellular structures build from inverted tetrapods were fabricated and experimentally tested using uniaxial compression tests in two orthogonal directions. Based on experimental results, the computational models using homogenised material model were developed and validated in LS-DYNA. Furthermore, the computational models based on
N. Novak, M. Vesenjak, Z. Ren
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Adaptive-Curvature Structures with Auxetic Materials
Advanced Materials Research, 2018Advancements in computational tools are offering designers the possibility to change their relationship with materials and establishing new synergies between matter, form and behaviour. This work explores this paradigm by introducing the use of auxetic metamaterials, specifically engineered to obtain properties beyond those found in nature, to generate
Naboni, Roberto +2 more
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Auxetic aluminum sheets in lightweight structures
Materials Testing, 2018Abstract This paper deals with the auxetic deformation behavior of periodically perforated aluminum sheets and their application for lightweight design. If commercially available metal sheets are provided with perforations, this can significantly change the mechanical properties of the sheets.
Ripplinger, Wolfgang +3 more
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Conventional and Auxetic SMA Cellular Structures
Aerospace, 2005This work illustrates the manufacturing and tensile testing of a novel concept of honeycomb structures with hexagonal and auxetic (negative Poisson’s ratio) topology, made of shape memory alloy (SMA) core material. The honeycombs are manufactured using Nitinol ribbons having 6.40 mm of width and 0.2 mm of thickness.
Mohd R. Hassan +3 more
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