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Low velocity impact of a recoverable multistable mechanical metamaterial with negative stiffness elements

  • Xi'an Jiaotong University
  • China Academy of Engineering Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Materials and structures absorbing shock energy are crucial for diverse engineering applications. Conventional materials or structures absorb energy through material destruction or viscoelastic effect, resulting in systems that can be used only once or strongly rate-dependent. Very recently, mechanical metamaterials have been designed in novel geometrics to achieve recoverable energy absorption in elastic systems, opening new avenue for mechanical dissipation of energy. However, numerical modeling of impact response of this mechanical materials is really scarce. Here we build a finite element method (FEM) model of a mechanical metamaterial with negative stiffness elements to simulate the quasi-static and low velocity impact behavior. Quasi-static simulation results agree well with experimental results reported in literature, and low velocity impact results indicate this mechanical metamaterial with multistable negative stiffness elements is ideal for impact energy absorption.

Original languageEnglish
Title of host publicationProceedings of the 26th International Congress on Sound and Vibration, ICSV 2019
PublisherCanadian Acoustical Association
ISBN (Electronic)9781999181000
StatePublished - 2019
Event26th International Congress on Sound and Vibration, ICSV 2019 - Montreal, Canada
Duration: 7 Jul 2019 → 11 Jul 2019

Publication series

NameProceedings of the 26th International Congress on Sound and Vibration, ICSV 2019

Conference

Conference26th International Congress on Sound and Vibration, ICSV 2019
Country/TerritoryCanada
CityMontreal
Period7/07/19 → 11/07/19

Keywords

  • Energy absorption
  • Low velocity impact
  • Multistabe
  • Negative-stiffness

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