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Abstract
Helical lattice structures as investigated by Pirrera et al. [1] possess non-linear elastic responses that may be tuned to offer various distinct behaviours such as zero stiffness and multi-stability. Potential applications of such helices were explored in further detail by O'Donnell et al. [2] by combining the lattice with an elastic medium permitting the system to display pseudo-ductility, thus highlighting one of many possible applications. Other such applications include, for example, adaptive and deployable structures, robotics, and vibration isolators. By coupling the helical lattice with a secondary system, additional response characteristics, that cannot be achieved by the lattice alone, can be obtained. A natural extension of [1,2], explored in this paper, is to consider the effects of combining multiple concentric lattice structures, coupled through radial springs, resulting in a design space that offers significant potential for non-linear elastic tailoring.
As is often observed in biological systems, structural hierarchy offers mechanisms through which novel response characteristics may be observed [3-6]. The helices in this investigation were inspired by the virus bacteriophage T4 [1]. The composite behaviour of the system under investigation exploits such hierarchy in order to obtain highly tuned nonlinear force displacement behaviour. The helices in each lattice are formed from pre-stressed composite strips, the lattices are then combined concentrically via elastic springs to form a composite helical system. An outline of the analytical modelling framework developed to capture this behaviour is now discussed.
As is often observed in biological systems, structural hierarchy offers mechanisms through which novel response characteristics may be observed [3-6]. The helices in this investigation were inspired by the virus bacteriophage T4 [1]. The composite behaviour of the system under investigation exploits such hierarchy in order to obtain highly tuned nonlinear force displacement behaviour. The helices in each lattice are formed from pre-stressed composite strips, the lattices are then combined concentrically via elastic springs to form a composite helical system. An outline of the analytical modelling framework developed to capture this behaviour is now discussed.
Original language | English |
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Number of pages | 2 |
Publication status | Published - 28 Oct 2016 |
Event | Multiscale Innovative Materials and Structures: MIMS16 - October 28-30, 2016 - Cetara - Cetara, Salerno, Italy Duration: 28 Oct 2016 → 30 Oct 2016 http://www.multiscale.unisa.it/index |
Conference
Conference | Multiscale Innovative Materials and Structures |
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Country/Territory | Italy |
City | Salerno |
Period | 28/10/16 → 30/10/16 |
Internet address |
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Dive into the research topics of 'Coupling of helical lattice structures for tunable non-linear elasticity'. Together they form a unique fingerprint.Projects
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Structural Efficiency and Multi-functionality of Well-Behaved Nonlinear Composite Structures
Pirrera, A. (Principal Investigator)
1/04/15 → 31/08/20
Project: Research