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Optimization of a material with a negative stiffness provided by an inherent bistable element

Citace:
HECZKO, J., DIMITROVOVÁ, Z., RODRIGUES, H. Optimization of a material with a negative stiffness provided by an inherent bistable element. In Engineering Optimization IV. London: Taylor & Francis Group, 2015. s. 439-443. ISBN: 978-1-138-02725-1
Druh: STAŤ VE SBORNÍKU
Jazyk publikace: eng
Anglický název: Optimization of a material with a negative stiffness provided by an inherent bistable element
Rok vydání: 2015
Místo konání: London
Název zdroje: Taylor & Francis Group
Autoři: Ing. Jan Heczko , Zuzana Dimitrovová , Helder Rodrigues
Abstrakt EN: It is known from literature that extreme damping can be achieved in materials incorporating neg- ative stiffness inclusions. In this paper a material realization of such a structure is presented and its behaviour is analysed. Polyethylene foam sheets are utilized as a base material and a negative stiffness component is sup- plied by an inherent bistable element introduced with the help of curved cuts. The damping performance can be optimized by a shape optimization provided a reliable finite element model is available. This paper gives guidelines to material fitting of such a structure, namely two methods are presented and a suitable material model is identified. The work presented is done in continuation of Heczko et al. (in press).
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