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

J. Heczko, Z. Dimitrovová, H.C. Rodrigues

Research output: Contribution to conferencePaperpeer-review

Abstract

It is known from literature that extreme damping can be achieved in materials incorporating negative 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 supplied 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). © 2015 Taylor & Francis Group, London.
Original languageEnglish
Number of pages5
Publication statusPublished - 1 Sep 2014
Event4th International Conference on Engineering Optimization - Lisbon, Portugal
Duration: 8 Nov 201411 Nov 2014

Conference

Conference4th International Conference on Engineering Optimization
Abbreviated titleEngOpt 2014
CountryPortugal
CityLisbon
Period8/11/1411/11/14

Keywords

  • Damping
  • Finite element method
  • Stiffness

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