Energy absorption of muscle-inspired hierarchical structure: Experimental investigation

Published on Oct 15, 2019in Composite Structures5.407
· 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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Apr 15, 2019·Composite Structures5.41
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Abstract Through evolutionary process, special biological structures (e.g. micro- or macro-scale helicoidal laminated structures) are formed naturally to resist natural enemies. With some bionic inspirations, anti-impact design of composite laminates applied for aerospace, vehicle, etc. can be stimulated by helicoidal biological structures. In the work, the Non-Linear Rotation Angle (NLRA) based bio-inspired helicoidal layups are designed to enhance the impact resistance capacity of composite la...
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Abstract Geometric configurations in nature could be mimicked in order to develop novel materials and structures with desirable properties. Lots of bio-inspired configurations had been introduced to tubal structures in promoting the energy-absorption performance of thin-walled structures. Nevertheless, these existing studies largely focused on hierarchical hexagonal honeycombs, and the bio-inspired hierarchical circular thin-walled structures under the out-of-plane crushing loads had not been we...
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Abstract Hierarchy has been introduced to honeycomb structures in pursuing ultralight materials with outstanding mechanical properties. Nevertheless, the hierarchical honeycombs under the out-of-plane loads have not been well studied experimentally and analytically for energy absorption to date. This study aimed to apply a special structural hierarchy to the honeycomb by replacing the sides of hexagons with smaller hexagons. The quasi-static test of the hierarchical honeycomb specimen was first ...
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