Energy absorption of muscle-inspired hierarchical structure: Experimental investigation

Published on Oct 15, 2019in Composite Structures5.407
路 DOI :10.1016/J.COMPSTRUCT.2019.111250
Hing-Ho Tsang21
Estimated H-index: 21
(Swinburne University of Technology),
Kwong Ming Tse13
Estimated H-index: 13
(Swinburne University of Technology)
+ 2 AuthorsAlan K.T. Lau1
Estimated H-index: 1
(Swinburne University of Technology)
Sources
Abstract
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.
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Abstract In this study, the underlying mechanism leading to improved impact resistance and energy absorption in bio-inspired composite is investigated through numerical modelling. The bio-inspired composite is inspired from the endocuticle of stomatopods, which is composed of mineralized helicoidal arrangement of fiber layers capable of withstanding high velocity impact. It is shown that the helicoidal architecture gives rise to a unique through-thickness spiralling damage which is in contrast t...
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