Size-dependent mechanical behavior and boundary layer effects in entangled metallic wire material systems

Yanhong Ma, Qicheng Zhang, Dayi Zhang, Di Gao, Fabrizio Scarpa, Jie Hong

Research output: Contribution to journalArticle (Academic Journal)peer-review

20 Citations (Scopus)
328 Downloads (Pure)

Abstract

This paper describes the influence on the compressive and dissipative behavior of Entangled Metallic Wire Material (EMWM) samples provided by their size and mutual connectivity. The mechanical properties of EMWM specimens with different thicknesses are obtained from quasi-static compressive and cyclic loading. The behavior of the stress-strain curves, tangent modulus and loss factor are strongly dependent on the thickness of the samples. The analysis from samples connected in different layouts shows that apart from the global thickness, size scale effects and contact interface also play important roles in controlling the behavior of EMWM systems. The importance of the sample size and its connectivity with adjacent different layers are defined by the unique microstructure and contact properties of the wires near the specimen boundary layer. The boundary layer produces different mechanical behaviors and a distinct structural configuration compared to the EMWM bulk solid. These peculiar characteristics are confirmed by microstructural and qualitative observations obtained from computed tomography (CT) scanning. The results and analysis presented in this work are relevant to designing EMWM material systems with adaptive performance under different loading and geometric constraints.
Original languageEnglish
Pages (from-to)3741–3756
Number of pages16
JournalJournal of Materials Science
Volume52
Issue number7
Early online date8 Dec 2016
DOIs
Publication statusPublished - Apr 2017

Keywords

  • entangled metallic wire material
  • compressive loading
  • scale effects
  • hysteresis
  • connectivity
  • CT scanning

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