Energy absorption of muscle-inspired hierarchical structure: Experimental investigation

H. H. Tsang, K. M. Tse, K. Y. Chan, Guoxing Lu, Alan K.T. Lau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)

Abstract

Muscles act as a cushioning layer protecting most of our brittle bones and delicate visceral organs. Inspired by the internal architecture of skeletal muscle tissues, a novel tubular section design with structural hierarchy was recently proposed for impact protection (Tsang and Raza, 2018). This paper presents a fundamental experimental investigation of the force resistance and energy absorption capabilities of the proposed hierarchical structure. A soft and ductile thermoplastic polyurethane (TPU) with Shore-A hardness of 95 is used for three-dimensional (3D) printing of the specimens. The enhanced force resistance and energy absorption are then quantified based on the hysteretic behaviour observed in a series of quasi-static compression tests with loading and unloading. The superior force resistance and energy absorption capabilities of the muscle-inspired hierarchical structure are proven.

Original languageEnglish
Article number111250
JournalComposite Structures
Volume226
DOIs
Publication statusPublished - 15 Oct 2019
Externally publishedYes

Keywords

  • 3D printing
  • Bio-inspired
  • Energy absorption
  • Skeletal muscle
  • Structural hierarchy
  • TPU

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

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