A bistable structural element

Schioler, Tyge; Pellegrino, Sergio

doi:10.1243/09544062jmes982

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…Additionally, to understand why π 1 controls the peak load ( Fig. 6(b)) of the H-PXCM, one can simply consider Euler Buckling (i.e., the peak load) for an individual tape spring ligament [47]:…”

Section: Energy and Peak Loadsmentioning

confidence: 99%

Mechanics of Chiral Honeycomb Architectures With Phase Transformations

Hector

Restrepo

Bonilla

et al. 2019

Journal of Applied Mechanics

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The mechanics of phase transforming cellular materials (PXCMs) with three different chiral honeycomb architectures, viz., hexachiral, tetra-anti-chiral, and tetra-chiral, are investigated under quasi-static loading/unloading. Each PXCM comprises interconnected unit cells consisting of tape springs rigidly affixed to circular nodes that can rotate and/or translate. The phase change is associated with snap-through instability due to bending of the tape springs and corresponds to sudden changes in the geometry of the unit cells from one stable configuration to another stable (or metastable) configuration during loading/unloading. When compared with similar chiral materials with flat ligaments, the chiral PXCMs exhibit a significantly higher energy dissipation in quasi-static experiments. The hexachiral PXCM was selected for detailed parametric analysis with finite element simulations including 21 models constructed to investigate the effects of PXCM geometry on phase change and energy dissipation. An analytical formalism is developed to predict the minimum compressive load required to induce phase transformation and snap-through. The formalism predictions are compared with those from finite element simulations. An Ashby plot is developed in which the energy dissipated per unit volume versus work conjugate plateau stress of the H-PXCM is compared with other energy absorbing materials.

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Section: Energy and Peak Loadsmentioning

confidence: 99%

Mechanics of Chiral Honeycomb Architectures With Phase Transformations

Hector

Restrepo

Bonilla

et al. 2019

Journal of Applied Mechanics

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“…Silver et al [15] proposed an integral folding hinge to deploy camera and investigated axial loading, bending induced buckling response. Schioler et al and Seffen et al [16,17] analyzed buckling properties of single layer TSH hinge based on Timoshenko theory. Seffen et al [18] got sample points by finite element method and obtained fitting nonlinear mechanical models by single value decomposition method of TSH hinge.…”

Section: Open Accessmentioning

confidence: 99%

Design and Experiment of Triangular Prism Mast with Tape-Spring Hyperelastic Hinges

Yang

Guo

Wang

et al. 2018

Chin. J. Mech. Eng.

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Because of the limited space of the launch rockets, deployable mechanisms are always used to solve the phenomenon. One dimensional deployable mast can deploy and support antenna, solar sail and space optical camera. Tape-spring hyperelastic hinges can be folded and extended into a rod like configuration. It utilizes the strain energy to realize self-deploying and drive the other structures. One kind of triangular prism mast with tape-spring hyperelastic hinges is proposed and developed. Stretching and compression stiffness theoretical model are established with considering the tape-spring hyperelastic hinges based on static theory. The finite element model of ten-module triangular prism mast is set up by ABAQUS with the tape-spring hyperelastic hinge and parameter study is performed to investigate the influence of thickness, section angle and radius. Two-module TPM is processed and tested the compression stiffness by the laser displacement sensor, deploying repeat accuracy by the high speed camera, modal shape and fundamental frequency at cantilever position by LMS multi-channel vibration test and analysis system, which are used to verify precision of the theoretical and finite element models of ten-module triangular prism mast with the tape-spring hyperelastic hinges. This research proposes an innovative one dimensional triangular prism with tape-spring hyperelastic hinge which has great application value to the space deployable mechanisms.

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